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首页> 外文期刊>Journal of Plant Nutrition >Effect of nitrogen sources on the yield of common bean (Phaseolus vulgaris) in western Kenya
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Effect of nitrogen sources on the yield of common bean (Phaseolus vulgaris) in western Kenya

机译：氮源对肯尼亚西部常见豆（Phopololus vulgaris）产量的影响

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Depletion of soil nutrients due to continuous cultivation without adequate external fertilization is one of the challenges facing many smallholder farmers in western Kenya. This study was conducted to assess the effects of organic (water hyacinth compost), inorganic (urea) nitrogen (N) sources, and commercial Rhizobia inoculant on the yield of common bean (Phaseolus vulgaris) for two consecutive seasons in the short rains (2013) and long rains (2014). The experiments were laid out in a randomized complete block design and replicated four times. Triple superphosphate was applied to all treatments except those with compost to ensure that the soil had adequate phosphorus (P). Yellow and Rose coco bean varieties grown with urea and inoculated with commercial Rhizobia inoculant gave significantly higher yield of 382kg ha(-1) and 341kg ha(-1), respectively in the short rains (SR) season. In the long rains (LR) season bean yield was high in water hyacinth compost (1526kg ha(-1)) and control with non-limiting P (1300kg ha(-1)) treatments. Commercial Rhizobia inoculant did not significantly increase in yield in the SR and LR seasons. There was no significant influence on soil properties after two seasons of continuous cultivation of common bean and application of organic and inorganic fertilizers. These results demonstrate that water hyacinth compost improved bean yield in the LR season. However, longer field testing and economic analysis are required for it to be recommended as a substitute for inorganic N source among smallholder farmers.
机译：由于不充分的外部施肥而导致的土壤养分枯竭是肯尼亚西部许多小农农民面临的挑战之一。进行该研究以评估有机（水葫芦堆肥），无机（尿素）氮（N）源和商业根瘤菌占常见豆类（Phessolus vulgaris）在短期下连续两个季节的影响（2013年）和长雨（2014年）。该实验是在随机的完整块设计中布置并复制四次。除了堆肥之外，将三重超磷酸盐应用于所有处理，以确保土壤具有足够的磷（P）。用尿素生长的黄色和玫瑰椰子豆品种和用商业根瘤菌接种的植物植物产生了382kg ha（-1）和341kg ha（-1）的显着提高，在短的下雨（sr）季节中。在长的降雨（LR）季节豆产率在水葫芦堆肥中高（1526kg ha（-1））和非限制性p（1300kg ha（-1））治疗。商业根瘤菌incululant在SR和LR Seasons中没有显着增加产量。连续培养常见豆类和应用有机和无机肥的应用后，对土壤性质没有显着影响。这些结果表明，水葫芦堆肥改善了LR季节的豆产量。然而，需要更长的现场测试和经济分析，以便建议作为小农农民的无机N个来源的替代品。

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