Working Document Series Open Access 2014 RUF-34121

Response of introduced soybean varieties to inoculation with rhizobium in Sud Kivu province, Democratic Republic of Congo

A.A. AngelaniK.D. BamulekeB.J. BashagalukeB.L. ShukuruM.J. Walangululu

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Abstract

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Soybeans are a major source of protein; they contribute to combating malnutrition especially among children. They play very important roles in NRM because they contribute to biological nitrogen fixation through the inoculation with rhizobium. After finding that the response of soybean to inoculation with rhizobium was more evident on soybean than on beans and that the response varied from soybean varieties used, this work reports on the response of introduced soybean germoplasm in many locations in the mandate N2Africa areas in Sud Kivu province, DR Congo to the inoculation with rhizobium, adding P and K so as to not be limitant factors. Trials were carried out first on split split plot design in Mudaka, administrative area of Kabare and then on split plot design in Murhesa, Mushinga, Mudaka local areas, in Kabare and Walungu administrative areas; a total of 10 varieties were tested, among them 8 introduced varieties, compared to 2 local check. Results showed that the response of varieties to inoculation varied with varieties and with locations. P application revealed significant effect even where the soil was considered as fertile. These trials have allowed understanding where to apply inoculation in the perspective of soybean variety dissemination in the mandate areas of N2Africa project. The analysis of additive main effect and multiplicative interaction (AMMI) based on inoculation and potassium factors showed genotype variability on performance of tested varieties; this allow to know where to disseminate which variety.

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Agricultural research Research methods

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