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标题：Rhizobium leguminosarum bv. viciae sp. inoculation improves the agronomic efficiency of N of common bean (Phaseolus vulgaris L.)
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作者：Anteneh Argaw ; Anteneh Argaw ; Ayele Akuma 等
期刊名称：Environmental Systems Research
电子版ISSN：2193-2697
出版年度：2015
卷号：4
期号：1
页码：1-13
DOI：10.1186/s40068-015-0036-z
语种：English
出版社：Springer
摘要：Abstract Background Due to common bean derives lower nitrogen (N) from symbiotic N2-fixation, it requires N either from inorganic fertilizer or soil N. Field experiments were conducted at four locations to evaluate the effect of Rhizobium leguminosarum bv. phaseoli inoculation on agronomic efficiency of N of common bean var. Dursitu major growing areas of eastern Ethiopia. Methods Six levels of inorganic N (0, 20, 40, 60, 80 and 100 kg N ha−1) and two inoculation treatments (uninoculated and inoculated) were factorially combined and laid out in randomized completely block design, replicated three times. Results AE-N, nodule number per plant (NN) and nodule dry weight per plant (NDW) decreased with N rates of application beyond 20 kg N ha−1. The highest AE-Ns at Babillae, Fedis and Haramaya sites were obtained from 20 kg N ha−1 applied with Rhizobium inoculation while 40 kg N ha−1 supplied with Rhizobium inoculation at Hirna site. Regardless of experimental sites, inoculation improved AE-N. A positive relationship between AE-N and NDW was also observed in all experimental sites. Significant increase in grain yield with increasing rates of N application was also observed. Conclusion Hence, it can be concluded that inoculation is recommendable to increases the efficient utilization of applied Mineral N.
关键词：Agronomic efficiency of N;Common bean;Inoculation;Rhizobium sp.