IMPROVING SEEDLING EMERGENCE AND DEVELOPMENT OF SOUR ORANGE AND CARRIZO CITRANGE ROOTSTOCKS BY SOME PRE-SOWING TREATMENTS | ||||
| Journal of Plant Production | ||||
| Article 23, Volume 34, Issue 4, April 2009, Page 3597-3609 PDF (630.63 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2009.117185 | ||||
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| Author | ||||
| M. A. Bassal* | ||||
| Horticulture Dept., Fac. of Agric., Suez Canal Univ., 41522, Ismailia, Egypt | ||||
| Abstract | ||||
| Seeds of Sour orange (SO) and Carrizo citrange (CC) rootstocks were treated by soaking for 24 h in tap water, Ca++NO3 at 0.2%, KNO3 at 0.2%, Goëmar (bio-stimulant) BM86 at 0.3 and 0.5%, Goëmar MZ63 at 0.5%, GA3 at 50 ppmor control (directly sowing) in a trial to improve the emergence and growth of seedlings aiming to produce good transplants. The seeds were sown under plastic house during February of 2006 and 2007 seasons. SO seeds had higher emergence percentage, emerged faster and gave lower number of seedlings/seed than those of C.C. Moreover, seedling of S.O was higher at 70 days after sowing, but after 6 months those of CC were the highest in stem length and diameter, and the lowest in fresh and dry weight. On the other hand, the leaves of CC had higher N content in both seasons and lower P content in the first season only, compared to SO. Treatments with Goëmar BM860.3% increased the emergence % (90.8 & 92.8%) as compared with all other ones, followed by GA3 (85.0 & 88.5%), tap water (86.5 & 88.0%) and KNO3 (84.7 & 85.8%). No significant differences were found in the emergence % among Ca++NO3, Goëmar BM86 (0.5%), Goëmar MZ63 (0.5%) and the control treatments. The average number of days required to complete the seedling emergence was reduced by soaking the seeds in tap water before sowing (emergence rate were 34.9 & 36.3 days, in both seasons, respectively). After 6 months from sowing, Goëmar MZ63 (0.5%) treatment produced seedlings with stem length (31.2 & 36.5 cm) higher than those of control one (28.4 & 33.7 cm). Seedling fresh and dray weights increased with tap water treatment compared to the control and GA3 ones. On the other hand, leaf N content increased with Ca++NO3 and Goëmar MZ63 (0.5%), while P leaf content was higher with all treatments, except KNO3 and GA3 compared to the control. | ||||
| Keywords | ||||
| Citrus; rootstocks; seeds; pre-sowing treatments; Sour orange; Carrizo citrange; emergence | ||||
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