The effects of different doses of cattle manure on yield and yield components as second crop organic soybean production

Abstract

Soybean {Glycine max (L.) Merill} is not only an important food source containing fat, protein, carbohydrate and minerals but also an important industrial plant providing raw material for many industries. Organic farming is an important element for sustainability of farming, protection of environment, and reduction of chemical fertilizers usage. Soybean, like other legumes, has rhizobium bacteria in its roots providing nitrogen and organic materials which facilitate the sustainability of organic farming. This study was conducted with the aim of researching the effects of the organic cattle manure doses on yield and yield elements of soybean under semi-arid climatic conditions in organic farming. In this study, organic cattle manure with the doses of 0, 500, 1000, 1500 and 2000 kg ha -1 were applied to Adasoy Soybean [Glycine max (L.) Merill] cultivar under the second crop conditions. There search was conducted according to the random blocks experimental design with three replications during 2013 and 2014. In results obtained from the two-years study determined that the seed yield varied between 1678.9 and 2611.8 kg ha -1 ; plant height varied between 87.00 and 112.00 cm; number of branches per plant varied between 3.04 and 6.28; first pod height varied between 7.68 and 12.81 cm; number of pod per plant varied between 103.83 and 138.66 per plant -1 ; protein ratio varied between 39.31% and 41.74%; 100 seeds weight varied between 12.49 g and 15.28 g; and oil ratio varied between 20.51% to 21.91%. According to the results of correlation analysis, positive and important correlations between seed yield with number of branches per plant (r=0.4964**), and number of pod per plant (r=0.4964*) and 100 seeds weight (r=0.5782**) were observed.