RESPONSE OF SOYBEAN (Glycine max L.) TO BIO AND MINERAL PHOSPHATE FERTILIZATION UNDER DIFFERENT LEVELS OF SOIL MOISTURE. | ||||
| Journal of Plant Production | ||||
| Article 1, Volume 27, Issue 10, October 2002, Page 6523-6532 PDF (3.61 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2002.256519 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| M. I. Abdel- Mohsen.; M. S. Aly; A. M. A. Rizk | ||||
| Food Legumes Res. Section, Field Crops Res. Inst. ARC, Giza Egypt. | ||||
| Abstract | ||||
| Two field experiments were conducted at Gemmiza Agricultural Research Station, Agricultural Research Center Gharbia Governorate, Egypt, during 2000 and 2001 seasons. The aim of this investigation is to study the difference between superphosphate application and inoculation with phosphate solubilizing microorganisms (phosphobactrin and vesicular arabuscular mycorrhiza VAM ) on soybean variety Giza 21grOWrl under two levels of soil moisture ( 40 % and 80 % depletion from soil available water). Increasing available soil moisture content caused significant increases in number of seeds per plant , seed weight per plant, seed yield ton per feddan , number of seeds per pod and maturity date in first season , while in second season it caused significant increases for number of pods, seeds , seed weight per plant and maturity date. So it caused significant increases for protein and phosphorus percentages. The inoc!:lla~ion by phosphobactrin , VAM and superphosphate application caused significant increases for all characters in both seasons except number of seeds per pod . (Table 3). The inoculation by phosphobactrin solid, micorrhiza solid , . phosphobactrin with superphosphate and micorrhiza with superphosphate caused significantincreases for characters number of branches , pods , seeds , seed weight per plant and seed yield ton per feddan in both seasons. Inoculation by mycorrhiza with 22 P2 05 gave the highest values of seed yield ton per feddan (1.830 - 1.850 tonlf~d.) compared to (1.100 - 1.187 ton/fed. of control in the first season, while in the second season gave (1.730 -1,747 ton/fed.) compared to (1.007 -1.160 ton/fed.) for control. So inoculation by mycorrhiza and superphosphate caused increases of protein percentage (41.40 % compared to 37.84 % for control and increases of phosphor percentage in seeds 0.62 % compared to 0.30 % of control. The available phosphorus in soil was higher by VAM inoculation than phosphobactrin inoculation and phosphorus application at rate of 22 P2 051 fed. Therefore it is recommended to inoculate the soil with VAM and phosphobactrin and decrease the phosphorus application doses or use rock phosphate to decrease the costs with soil moisture for field capacity to 40 % depletion from available soil water. | ||||
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