期刊名称：International Journal of Development and Sustainability
印刷版ISSN：2186-8662
出版年度：2014
卷号：3
期号：5
页码：1013-1025
出版社：International Society for Development and Sustainability (ISDS)
摘要：Snap bean (Phaseolus vulgarisL.) ranks first among vegetables produced for the export market in Kenya. All Snap beanswere planted in different treatments containing various levels of Nitrogen of Calcium Ammonium Nitrate (CAN) Treatments T1-T2ha d IgN,1.5gN, 2.0gN, 2.5gN, 5gN, 10gN and 15gN res pectively while T8was inoculated with Rhizobium. The control T9lacked nitrogen. All were supplied with equal amounts of phosphorus fertilizer (5.5g) single super phosphate per plant. The effects of different levels of nitrogen were determinedon the vegetative growth, seed and pod production and nodulation. It was found that an increase in nitrogen application increased vegetative growth, dry matter production, seed and pod production. Increased Nitrogen application had a negative effect on nodulation. T1which had the least level of nitrogen application managed to modulate moderately and also had high yields and dry matter production as compared to the control. However, inoculation alone had best nodulation but s eed production, vegetativ e growth and dry matter production was low compared to the treatment with least nitrogen indicating that the nitrogen fixed through nodules was not enough for maximum production. From this study, it can be recommended that 22kg N/ha would be economical for snap beans production.
