EFFECT OF FORMS AND LEVELS OF POTASSIUM FERTILIZER ON YIELD OF COMPONENTS OF ONION AND SOYBEAN | ||
| Journal of Plant Production | ||
| Article 2, Volume 28, Issue 7, July 2003, Pages 5129-5138 PDF (1.32 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpp.2003.252487 | ||
| Author | ||
| A. A. Darwish, | ||
| Soil, Water and Environment Res. Inst. Agric. Res. Center, Egypt. | ||
| Abstract | ||
| Two field experiments were carried out at Gemmeiza Agricultural Research Station Farm during 1999 and 2000 seasons to study the influence of two potassium fertilizer forms. i.e, potassium sulphate and potassium chloride at three different rates o , 30 and 60 kg K20/fad on yield. yield components, NPK, and total carbohydrates contents of onion and soybean. 1. Onion The obtained data indicated that fresh and dry weights of bulb and onion bulbs yield / fad (as fresh and dry weights) was higher with K2SO. than those treated with KCI. Application of 30 and 60 kg K20/ fad significantly increased fresh and dry weight (g) of bulb and, bulbs yield / fad. (as fresh and dry weights), compared to untreated plants. On the other hand. increasing K fertilizer levels from 30 to 60 K20/ fad did not affect bulbs yield / fad (as fresh and dry weights) as well as fresh and dry weights of bulb. The NPK content and total carbohydrates in bulbs tended to increase with application of KzS04• compared to KC!. Increasing applied K levels to 30 and 60 kg K20 / fad led to increase P and K contents of bulbs whereas bulb N content did not affect by incremental dose of K. 2. Soybean Yield components of soybean l.e, number of branches / plant number of bods/plant. number of seeds/body. bod weight. seed yield/plant and 100- seed weight ware not significantly affected by potassium source. Seed and straw yields of soybean, fertilized with KzSO., was higher than those treated with KC!. Application of 30 and 60 kg KzO/ fad increased number of bods/plant. number of seeds/bod. seed yield/plant. seed yield/ fad compared to control. The N. P and K contents were not significantly affected by potassium source or levels. From the aforementioned results it can be concluded that for high yield production of onion and soybean potassium fertilizer, must be applied at 60 for onion and 30 for soybean Kg K20/ fad as potassium sulphate. | ||
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