EFFECT OF POTASSIUM AND BORN ON GROWTH
AND PRODUCTIVITY OF BROAD BEAN IN SANDY
SOIL - BALOZA-NORTH SINAI
Habib, A.A.M. 1 ; F.A.El- Azizy 1 and A.M. Abd-El baset 2
1Desert Research Center, Soil Fertility and Microbiology Dep.
2Desert Research Center, Plant Production Dep.
Key Word: K silicate, K sulphate, Boron, nutrients concentrations and
uptake Sandy soil North Sinai.
ABSTRACT
The experimental field is located bean
crop is cultivated in winter season 2019.The objective of this work was to
study the effect of B and K as foliar application at rates of 50, 75 ppm for B
while 1000 and 2000 ppm for K as silicate and K sulphate on growth and
productivity of broad bean grown sandy soil at Baloza station-North Sinai.
The obtained results indicated that the yields components of broad bean
were improved with increasing B application. The K –forms took the same
behavior of B where the K2 showed the higher effect on the yield
parameters than K1. The K silicate had the priority than sulphate. The
nutrients concentrations increased with increasing rates of K and the silicate
forms gave higher values than sulphate forms. Also N, P, K and B uptake
had the same behavior as nutrients concentrations. The most efficient
treatment was found where using the second rate of both B and K silicate
form which achieved 2.92 and 1.11 ton/ fed of shoots and seeds broad bean
plants and noticed that highest K- utilization of yields (shoot + seeds) with
K- silicate form addition.
INTRODUCTION
Faba bean (Vicia faba, L.) is one of the most important leguminous
crops used as a human diet in many countries. Sandy soils encourage rapid
loss of added fertilizers and hence, they are mostly poor in their nutrient
contents.
B is one of the essential elements for plant growth and productivity,
especial importance in retaining flowering and fruit setting. It is leachable in
sandy soils. Researches have been done on Boron foliar application near pod
setting and seed –filling stages (Zhang, 2001). Shaaban, et al., (2004)
reported that the boron deficiency found to affect plant growth and reduced
yields. Better growth and good yields were obtained when crops were
supplied with boron (Gupta, 1989 & Li and Liang, 1997). Shaaban and
El-Fouly, (2001) reported that boron application increased phosphorus
uptake by faba bean roots. Mola, et al., (1998) reported that the Ca, B and
K/Na ratios declined in leaves of faba bean as a response of boron
Egypt. J. of Appl. Sci., 35 (11) 2020 125-139
application. Boron has a synergetic effect on nitrogen and other nutrients
uptake and utilization by faba bean plants, in sandy soil (Mahmoud, et al.,
2006).
Potassium is an important nutrient for plant growth and
physiological functions, including regulation of water and gas exchange in
plants, protein synthesis, enzyme activation, and photosynthesis and
carbohydrate translocation in plants. Potassium has favorable effects on
metabolism of nucleic acids, proteins, vitamins and growth substances
(Bednarz and Oosterhuis, 1999). Wang, et al., (2013) and Salami and
Saadat, (2013) pointed out that the K plays an essential roles in enzyme
activation, protein synthesis, photosynthesis, osmoregulation, stomata
movement, energy transfer, phloem transport, cation-anion balance and
stress resistance. The foliar applications of K can improve yield and quality,
especially in heavy clay or in sandy soils where K is not readily available for
the plants (Marchand and Bourrie, 1999). Various sources of K salts are
used for plants nutrition such as potassium chloride (KCl), potassium
sulphate (K2SO4), mono potassium phosphate (KH2PO4), and potassium
nitrate (KNO3) (Magen, 2004). Also potassium silicate (K2O.4SiO2) caused
very good results to improve the growth and yield of plants under saline
conditions (Salim, et al., 2011 & 2013 and Salim, 2014). Sufficient
potassium help plants resist frost, drought and certain diseases. Tahir, et al.,
(2006) reported that potassium has a significant role in improving plant
water status and mitigating the toxic effects of Na.
Silicon has not been proven to be an essential element for higher
plants, but its beneficial effects on growth have been reported in a wide
variety of crops, including rice, wheat, barley and cucumber. Si fertilizer is
applied to crops in several countries for increased productivity and
sustainable production (Ma, et al., 2001). The amount of Si in soil may vary
considerably from 1 % to 45 % (Sommer, et al., 2006). Most Si is present in
the soil as insoluble oxides or silicates, but plants can easily absorb silicic
acid Si (OH)4 from soil. Silicic acid is generally found in the range of 0.1-
0.6 mM in soils (Epstein, 1994 & 1999) The agricultural benefits of silicon
amendments on a soil ecosystem are well established. Silicon has been
shown to mitigate adverse effects of water, mineral deficiency (Ma, et al.,
2001) and alleviate the effects of biotic stresses including salt stress, metal
toxicity and nutrient imbalance (Ma, 2004).
Pandey and Yadav, (1999) reported that spraying silicon increased
grain yield/plant of wheat. As well as increase in plant water status,
chlorophyll content, biological yield and harvest index, coupled with
126 Egypt. J. of Appl. Sci., 35 (11) 2020
reduced values of water potential, increase in dry matter accumulation, dry
matter production rate, leaf area/ plant at the flowering stage, productive
tillers, grains and grain yield/main spike and per plant and transpiration rate
coupled with a decrease in stomata conductance. Silicon application correct
to some extent the negative effects of salinity either on growth, yield,
nutrients uptake.
Concerning the nutrients effect on other nutrients concentration and
uptake, Ati and Ali, (2011) reported that the nitrogen and phosphorus
percentage (%) of dry weight and as uptake by beans increased with
increasing rate of boron applications. Hossain, et al., (2011) reported that
the effect of B on the nutrient uptake of six elements followed the order K>
N> S> P> B> Zn and these were significantly influenced by increasing B
application. Khattab, et al., (2016) reported that the spray foliar application
of boron (150 ppm), potassium sulphate (2%) and potassium phosphate
(1.5%) significantly increased all the studied characters, with superiority the
interaction of boron 150 ppm and potassium phosphate 1.5% which caused
the highest increases in all the studied characters. Taha, et al., (2016)
decided that the mean values of vegetative growth parameters as (plant
height, fresh and dry weight as well as leaf area), fresh weight of pods and
seeds of faba bean, N, P, K, Fe in plant foliage and seeds were increased
significantly with increasing rates of potassium fertilizers. Siam, et al.,
(2018) stated that the N, P and K content and uptake by shootss, and grains
increased by Si addition as they compared with those without Si addition.
Fertilizer efficiency is an objective for all involved in agriculture, the
fertilizer industry, and researchers to helping farmers to increase crop yield.
This describes between yield, nutrient efficiency, and the environment was
soundly suitable by Dibb (2000). The Present investigation aimed to study
the effect of Boron (B) as foliar application and some sources of potassium
(K) fertilization (sulphate and silicate) and their interaction on yield and
yield component as well as the chemical composition of shoots, seeds and
their K –utilization efficiency of broad bean plants grown in sandy soil
under drip irrigation system at Baloza station at North Sinai.
MATERIAL AND METHODS
A field experiment was carried out at Baloza Research Station of the
Desert Research Center, Egypt, located N E. Using
Broad bean crop in winter season 2019.The main target is to study the effect
of B and K as foliar application at rate 50, 75 ppm for B as (Boric acid 17%
B) while 1000 and 2000 ppm for K as (silicate or sulphate) [K2SO4
(contained 50% K2O) or K2SiO3 (contained 10% K2O and 25% SiO2)] on
Egypt. J. of Appl. Sci., 35 (11) 2020 127
growth and productivity of broad bean grown in sandy soil at Baloza station,
North Sinai.
The studied treatments are compared with farmer treatment in the
region. The treatments (B) and (K) were added foliarly after 25 & 50 and 75
days after sowing (DAS). Broad bean seeds were sown at 1 November,
2018, in rows spacing 70 cm .w and 20 cm between seeds/hills (30,000
plant/fed). All treatments received 30 kg P2O5/fed as ordinary
superphosphate, 75 kg N/fed as ammonium sulphate (20.5% N) and half
douse of potassium sulphate (25% K2o). Compost as organic manure at rate
of 20 m3/ fed and P were added during soil preparation .While nitrogen
fertilizer was applied in three equal doses at sowing and after 25 & 50 and
75 days from planting.
The experiment was carried out in a split plot design with three
replications (Snedecor and Cochran, 1967), where the main factor was the
foliar application of B and sub main was K sources. The experiment was
irrigated using drip irrigation system. Some physical and chemical
properties of the studied soil were determined acceding to Page et al.,
(1982) and Klute (1986), as recorded in Table (1).
Table (1). Initial status of some physical and chemical properties of
the experimental soil
Soil depth
(cm)
pH
Soil
past
E. C
dsm-1
Soluble Cations
(me/l)
Soluble Anions
(me/l)
Texture
class
0 - 30 8.04 1.07
Ca++ Mg++ Na+ K+ HCO3
-
SO4= Cl-
Sandy
2.24 3.17 4.66 0.64 4.13 3.18 3.40
Available
nutrients
(ppm)
N P K Fe Mn Zn Cu
34 3.2 46 5.52 2.18 0.97 0.28
pH: Acidity E.C.: Electrical conductivity me/l: mille equivalent per liter.
Chemical analysis of the irrigation water was presented in Table
(2). It is clear that such water having pH value of 7.23, which mean that
it enriched with soluble alkaline ions. It is also having EC value of 2.60
dS/m and SAR value of 3.06, which mean that, it is suitable for irrigation
Ayers and Westcot (1985).
Table (2). Chemical analysis data of the used irrigation water.
Parameters pH
E.C
(dSm-1)
Soluble cations
(me/l)
Soluble anions (me/l)
SAR
Ca++ Mg++ Na+ K+ HCO3
- Cl- SO4
=
Values 7.23 2.60 13.90 0.43 8.20 3.50 6.0 15.20 4.80 3.06
At maturity (150 days after sowing) the plants were harvested.
Number of pods per plant, number of seeds per pod, seed yield/ (Fed) and
shoots yield (ton/Fed) were determined of the seeds and shoots were ground
128 Egypt. J. of Appl. Sci., 35 (11) 2020
and wet digested using mixture of H2SO4 and HClO4 as recommended by
Peterburgski (1968) and the following chemical analyses were carried out:
- Total nitrogen was determined using Microkjeldahl method, Phosphorus
was calorimetrically determined using ascorbic acid and ammonium
Molybdate (Jackson, 1958). Potassium was determined by flame
Photometric and (B) by atomic absorption spectrophotometry, all were
determined according to the methods described by Chapman and Pratt,
(1961).
- Protein content was calculated by multiplying the N concentration with
factor 6.25.
- The equation used for calculating K- utilization efficiency (KUTE)
according to Graham, et al., (1992).
- (KUTE) = (kg dry matter /kg uptake).
Nitrogen, P, K and B available in soil at the end experiment were
determined according to the methods described by Klute (1889).
RESULTS AND DISCUSSION
Effect of foliar Boron and K on yield components of broad bean:
Data in table (3) showed that the yield components of broad bean
were increased with increased B application. The K –forms took the same
behavior where the K2 showed the higher effect on yield parameters than
K1. The K silicate showed superior effect on yield components than
sulphate. The superior treatment was the 1st rate of B and the 2nd rate of K
silicate which achieved 2.92 tons seeds per fed. This variation in the yield
may be due to the potassium forms. These results agreed with the obtained
by Marchand and Bourrie, (1999); Salim et al., (2011); Abou-Baker et
al., (2011); Salim, (2014) and Mahmoud et al., (2019).
Also, the increasing effect of potassium silicate may be due to the
positive impact of due to its role in improving physical, chemical and
biological condition of soil, its direct effect attributed to its metabolic
activity in plant growth. Therefore when plants were treated with potassium,
chlorophyll contents were increased which enhanced overall photosynthetic
activities of plants and thereby yield. These results are in agreement with
(Abdo et al., 2001) who reported that the addition of 1 kg K2O/fed, as foliar
spray, to bean plants significantly increased number of pods/plant, weight,
seed yield/plant and seed yield/ (Fed). Silicate solutions had the superiority
effect compared with sulphate solutions. This may be refer to silicon which
promotes the growth of various higher plant species (Zhu et al., 2004),
although there is a plenty supply of sulphate by addition of all commercial
fertilizers and rarity of silicate supply.
Egypt. J. of Appl. Sci., 35 (11) 2020 129
Table (3). Effect of treatments on yield parameters at harvesting of
broad bean plants
*B
Rates
K Forms
*K
Rates
No. of Plant
Weight
(g plant-1)
Weight
(ton fed-1)
Pods Seeds Pods Seeds Shoots Seeds
Control 1.50 1.37 9.01 7.99 0.61 0.24
B1
Sulphat
1 3.67 3.33 21.97 19.50 1.48 0.58
2 5.00 4.33 27.10 25.37 2.07 0.76
Silicate
1 4.33 3.67 27.53 25.20 1.69 0.76
2 5.33 4.67 32.30 30.80 2.31 0.94
B2
Sulphat
1 5.00 4.67 30.70 28.47 2.17 0.85
2 5.67 5.33 32.40 30.64 2.38 0.91
Silicate
1 5.33 4.67 35.40 32.78 2.69 0.98
2 6.33 5.00 40.27 37.17 2.92 1.11
Farmer 3.33 2.67 17.53 12.96 1.13 0.41
Means of Treatments
Means of B rates
1 4.58 4.00 27.2 25.2 1.89 0.760
2 5.58 4.92 34.7 32.3 2.54 0.963
Means
of K
Sulphat
1 4.34 4.00 26.3 24.0 1.83 0.715
2 5.34 4.83 29.8 28.0 2.23 0.835
Silicate
1 4.83 4.17 31.5 29.0 2.19 0.870
2 5.83 4.84 36.3 34.0 2.62 1.03
LSD (0.05)
LSD (0.05) Boron 0.655 Ns 0.618 0.748 35.7 28.5
K-forms Ns Ns 0.222 0.690 7.33 22.8
K-rates 0.720 0.544 0.604 0.539 9.03 18.4
Boron x K-forms 2.54 Ns 0.314 Ns 10.4 Ns
Boron x K-rates Ns Ns 0.854 0.762 12.8 26.0
K-forms x K-rates 1.02 Ns 0.854 Ns 12.8 26.0
Boron x K-forms x K-rates Ns Ns 1.21 1.08 Ns Ns
*B Rates as B1, 2= 50, 75 mgL-1 or *K Sulphate or Silicate Rates as1, 2= 1000, 2000 ppm.
Effect of foliar Boron and K on nutrients concentrations of broad
bean
Data in table (4) clearly showed that nutrients concentration were
increased with increasing, also rates of both B and K silicate forms
showed the high effect on nutrients concentrations than sulphate forms.
The most efficient treatment was the addition of the 2nd rate of boron and
potassium silicate which achieved highest concentrations of nutrients as
following 1.34 and 2.58% of N, 0.17 and 0.31% of P, 1.70 and 164% of
K and 18.80 and 24.40 ppm of B ppm in shoots and seeds respectively.
The provirus results are agreed with the obtained by Mola et al., (1998);
Shaaban and El-Fouly, (2001); Shaaban et al., (2004); Mahmoud et
al., (2006) and Mahmoud et al., (2019).
130 Egypt. J. of Appl. Sci., 35 (11) 2020
Table (4). Effect of treatments on nutrients concentration in shoots
and seeds of broad bean plants
*B Rates
K Forms
*K Rates
N (%) P (%) K (%) B (ppm)
Shoots
Seeds
Shoots
Seeds
Shoots
Seeds
Shoots
Seeds
Control 0.34 0.86 0.06 0.09 0.56 0.46 0.23 0.34
B1
Sulphat
1 0.83 2.10 0.14 0.22 1.36 1.11 15.97 19.30
2 0.87 2.13 0.14 0.23 1.43 1.21 16.40 19.73
Silicate
1 1.15 2.43 0.15 0.26 1.51 1.41 16.70 20.37
2 1.17 2.49 0.16 0.26 1.56 1.48 17.87 21.07
B2
Sulphat
1 0.93 2.24 0.15 0.24 1.46 1.31 16.93 20.70
2 1.09 2.33 0.15 0.25 1.48 1.37 17.63 22.93
Silicate
1 1.29 2.52 0.17 0.27 1.64 1.58 18.43 21.17
2 1.34 2.58 0.17 0.31 1.70 1.64 18.80 24.40
Farmer 0.75 2.06 0.16 0.22 1.13 0.97 6.55 7.91
Means of treatments
Means of B Rates
1 1.01 2.29 0.148 0.243 1.47 1.30 16.7 20.1
2 1.16 2.42 0.160 0.268 1.57 1.48 17.9 22.3
Means of K
Sulphat
1 0.88 2.17 0.145 0.230 1.41 1.21 16.5 20.0
2 0.98 2.23 0.145 0.240 1.46 1.29 17.0 21.3
Silicate
1 1.22 2.48 0.160 0.265 1.58 1.50 17.6 20.8
2 1.26 2.54 0.165 0.285 1.63 1.56 18.3 22.7
LSD (0.05)
Boron 0.020 0.038 0.0024 0.0013 0.018 0.011 0.459 0.542
K-forms 0.029 0.041 0.0013 0.0028 0.019 0.011 0.362 0.406
K-rates 0.012 0.016 0.0012 0.0019 0.008 0.015 0.252 0.269
Boron x K-forms Ns 0.058 0.0019 0.004 0.027 Ns Ns Ns
Boron x K-rates 0.017 Ns Ns 0.0026 0.012 Ns Ns 0.380
K-forms x K-rates 0.017 Ns 0.0017 0.0026 Ns Ns Ns 0.380
Boron x K-forms x K-rates 0.025 0.031 Ns 0.0037 0.017 Ns 0.504 Ns
*B Rates as B1, 2= 50, 75 mgL-1 or *K Sulphate or Silicate Rates as1, 2= 1000, 2000 ppm.
Data presented in Table (5) showed that, effect of foliar application
K form (sulphat and silicate) on K- utilization by dry matter yields (shoot
+ seeds) in Broad bean plants. As for the effect of K foliar on kutilization
they are found that, highest K-utilization on yields of Broad
bean were with K – silicate form addition high rate and were 62.32 kg/
fed compared with control treatments. And noticed that, low Kutilization
with K-sulfate form addition and were 70.98 kg with low rate
of K sulphate form addition.
Egypt. J. of Appl. Sci., 35 (11) 2020 131
Table (5). Effect of treatments on Potassium utilization in shoots and
seeds of broad bean plants.
*B Rates K Forms *K Rates Yield K Uptake K Uti.
Control 849.70 4.52 188.04
B1
K Sulphate
1 2061.00 26.57 77.57
2 2834.33 38.79 73.08
K Silicate
1 2446.00 36.15 67.67
2 3250.67 49.93 65.11
B2
K Sulphate
1 3024.00 42.83 70.62
2 3293.33 47.82 68.88
K Silicate
1 3677.00 59.80 61.49
2 4036.33 67.81 59.52
Farmer 1540.00 16.75 91.96
Means of treatments
Means of B Rates
1 2648.00 37.86 70.86
2 3507.67 54.56 65.13
Means of K
K Sulphate
1 2542.50 34.70 74.09
2 3063.83 43.30 70.98
K Silicate
1 3061.50 47.98 64.58
2 3643.50 58.87 62.32
*B Rates as B1, 2= 50, 75 mgL-1 or *K Sulphate or Silicate Rates as1, 2= 1000, 2000 ppm.
Effect of foliar Boron and K on nutrients uptake (kg fed-1) by broad
bean
Data in figures (1- 4) showed the N (Fig. 1), P (Fig. 2), K (Fig. 3) and
B (Fig. 4) uptakes. It is noticed the that the effect of the studied treatments
indicated the same effect as showed in these concentrations, where
increasing application of both B and K increased the uptake of N, P, K and
B. Also, Silicate form indicated the high values compared with sulphate
form of K. These results are in agreement with Ati and Ali (2011); Hossain
et al., (2011); Khattab et al., (2016); Taha et al., (2016); Siam et al.,
(2018) and Mahmoud et al., (2019).
Fig. (1). Effect of treatments on N uptake in shoots and seeds of broad bean plants.
*B Rates as B1, 2= 50, 75 mgL-1 or *K Sulphate or Silicate Rates as1, 2= 1000, 2000 ppm.
0
5
10
15
20
25
30
35
40
45
Control Farmer
t.
R1 R2 R1 R2 R1 R2 R1 R2
K.Sulph. K.Silic. K.Sulph. K.Silic.
B1 B2
N uptake (Kg/fed)
Shoots Seeds
132 Egypt. J. of Appl. Sci., 35 (11) 2020
Fig. (2). Effect of treatments on P uptake in shoots and seeds of broad bean plants.
*B Rates as B1, 2= 50, 75 mgL-1 or *K Sulphate or Silicate Rates as1, 2= 1000, 2000 ppm.
Fig. (3). Effect of treatments on K uptake in shoots and seeds of broad bean plants.
*B Rates as B1, 2= 50, 75 mgL-1 or *K Sulphate or Silicate Rates as1, 2= 1000, 2000 ppm.
Fig. (4). Effect of treatments on B uptake in shoots and seeds of broad bean plants.
*B Rates as B1, 2= 50, 75 mgL-1 or *K Sulphate or Silicate Rates as1, 2= 1000, 2000
0
10
20
30
40
50
60
Control Farmer
t.
R1 R2 R1 R2 R1 R2 R1 R2
K.Sulph. K.Silic. K.Sulph. K.Silic.
B1 B2
B uptake (g/fed)
Shoots Seeds
0.0
1.0
2.0
3.0
4.0
5.0
6.0
Control Farmer
t.
R1 R2 R1 R2 R1 R2 R1 R2
K.Sulph. K.Silic. K.Sulph. K.Silic.
B1 B2
P uptake (Kg/fed)
Shoots Seeds
0
10
20
30
40
50
60
Control Farmer
t.
R1 R2 R1 R2 R1 R2 R1 R2
K.Sulph. K.Silic. K.Sulph. K.Silic.
B1 B2
K uptake (Kg/fed)
Shoots Seeds
Egypt. J. of Appl. Sci., 35 (11) 2020 133
Effect of foliar Boron and K on protein content (%) by broad bean:
At figure (5) it is noticed that bean increased with increasing rates
of both B and K. Also, Silicate form of K showed the superior effect
compared with sulphate form. Those facts are agreed with the obtained
results by Ati and Ali (2011); Hossain et al., (2011); Khattab et al.,
(2016); Taha et al., (2016) and Siam et al., (2018).
Fig. (5). Effect of treatments on protein content in seeds of broad bean plants.
*B Rates as B1, 2= 50, 75 mgL-1 or *K Sulphate or Silicate Rates as1, 2= 1000, 2000 ppm.
Mineral content in soil after harvesting:
The sandy soil had a much lower exchange capacity and
concentration of elements such as N, P, K and B than heavier soil. And
suffer from loss of elements by leaching. Data in table (6) showed that
the studied available elements after harvesting reveal the flowing:
Addition of K fertilization form associated with B increased the
extractable amounts of N, P, K and B this increase of elements in soil
after harvesting may be due to B and K addition increases nodes of roots
hair by Broad bean plants and compost analysis in soil after harvesting.
Although, this increase had no arrived to adequate elements of N, P, K
and B in soil after harvesting. The following Tables give an interpretation
of the index values for P and K for the DTPA soil test (Soltanpour et al.,
1979); and N by (Jackson, 1958).
Category P (mg/kg) K (mg/kg) N (mg/kg)
Low 0 - >4 0 - >60 0 - 40
Marginal 4 -7 60-120 40 - >80
Adequate <7 <120 <80 - 160
While being the highest extractable amounts of N, P, K and B in
soil after harvesting were 40.6 ppm for N, 5.4 ppm for P and 43.4 ppm
0.0
2.0
4.0
6.0
8.0
10.0
12.0
14.0
16.0
18.0
Control Farmer
t.
R1 R2 R1 R2 R1 R2 R1 R2
K.Sulph. K.Silic. K.Sulph. K.Silic.
B1 B2
Protien (%)
Seeds
134 Egypt. J. of Appl. Sci., 35 (11) 2020
for K and 0.75 ppm for B at addition of high level of B and K silicate
form. It is concluded that plants grown at higher K level and sufficient B
had better development of nodules and consequently higher nitrogen
fixation, it is due to increase of nutrients in the soil after harvesting.
Table (6). Effect of treatments on available N, P, K and B (ppm)
after harvesting broad bean plants.
B
Rates
K
Forms
K
Rates
N P K B
(ppm)
Control 12.4 1.1 14.4 0.11
B1
Sulphat
1 35.4 3.2 41.2 0.62
2 35.8 3.7 41.3 0.64
Silicate
1 36.3 4.3 42.4 0.69
2 37.1 4.5 42.7 0.71
B2
Sulphat
1 36.2 3.5 41.5 0.66
2 36.7 4.2 41.6 0.67
Silicate
1 38.2 4.8 43.1 0.74
2 40.6 5.4 43.4 0.75
Farmer 24.8 3.3 26.5 0.51
LSD(0.05)
LSD(0.05) Boron 0.37 0.043 0.61 0.021
K-forms 0.49 0.112 0.55 0.010
K-rates 0.66 0.077 0.81 0.011
Boron x K-forms 0.20 0.047 0.23 0.004
Boron x K-rates 0.91 0.106 1.13 0.014
K-forms x K-rates 0.93 0.108 1.14 0.016
Boron x K-forms x K- rates 0.90 0.104 1.10 0.015
CONCLUSION
The aim of work is studding the effect of B and K as foliar
application K silicate or K sulphate on growth and productivity of broad
bean grown in sandy soil at Baloza station, North Sinai. The yield
parameters were increased with B increasing application. The K –forms
took the same behavior in the rates where the K2 showed higher effect on
yield parameters than K1. The K silicate showed the superior of effect on
yield parameters than sulphate. The nutrients concentrations and uptake
increased with increasing rates of K and the silicate forms give the better
results than sulphate forms. The most efficient treatment was B2K2 as
silicate which achieved 2.92 ton seeds fed of bean broad.
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تاثير البوتاسيوم والبورون على نمو وانتاجية الفول الرومى بالا ا رضى الرملية -
بالوظة – شمال سيناء
اشرف احمد محمد حبيب 1, فتحى عبدالفتاح العزيزى 1, اشرف محمد عبدالباسط 2
1 مرکز بحوث الصح ا رء – قسم خصوبة وميکروبيولوجيا الا ا رضى.
2 مرکز بحوث الصح ا رء – قسم الانتاج النباتى.
أقيمت تجربة حقمية عمى محصول الفول الرومى في فصل الشتاء 2012 وکان اليدف
من التجربة ىو د ا رسة تأثير رش البورن اولبوتاسيوم عمى نمو وانتاجية الفول الرومى في الارض
50 ممجم بو ر ون /لتر ، الرممية بمحطة بحوث بالوظو- شمال سيناء وکانت الاضافات بمعدل 00
2000 کجم بوتاسيوم /فدان عمى صورتين ىما سيميکات والکبريتات. ، والبوتاسيوم 1000
أظيرت النتائج زيادة مکونات المحصول بزيادة معدل رش البورون.کما تأخذ
صو ا رلبوتاسيوم المضافة نفس السموک حيث کان لمترکيز الثانى من البوتاسيوم المضاف أعمى
التاثير الکبير عمى مکونات K تأثير عمى الإنتاجية من الترکيز الاول. أوظيرت سيميکات
المحصول من تأثير الکبريتات. ولخصت النتائج أن أکثر المعاملات فاعمية في ىذه الد ا رسة
کانت إضافة 50 ممجم /لتر من البو ر ون مع 2 کجم /فدان من سيميکات البوتاسيوم حيث أعطت
تمک المعاممة 2.22 طن بذور/فدان من الفول مقارنة بالمعاملات الاخرى. کما لوحظ أن أعمى
استفادة من السماد البوتاسى بالرش عمى المحصول )القش + البذور( کان مع البوتاسيوم فى
صورة سيميکات .
Egypt. J. of Appl. Sci., 35 (11) 2020 139
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