Interaction Effect of some Biofertilizers and Irrigation Water Regime on Mung bean (Vigna radiata) Growth and Yield

Abstract

: The interactive effect of biogin and nitrobin biofertilizers and compost on growth, yield and metabolic products of mung bean (Vigna radiata L.) cv. Kawmy l under different irrigation water regimes of 5d, 10d & 15d drying cycle studied. Growth and yield were suppressed in plants of water regime II (10d drying cycle), while plants under regime III (15d drying cycle severely and harmfully affected. Addition of biofertilizers mitigated the harmful effect of water stress. The greatest yield/plant was obtained in plants of water regime I (5d drying cycle) treated with biogin amounting to 282% of unfertilized plants. Plants treated with biogin under regime II (10 d drying cycle) yielded 145% of unfertilized control (regime I). Biofertilized plants exhibited higher values of leaf metabolic products than nonfertilized plants. The response of leaf metabolic products to nitrobin was more marked than for the other biofertilizers. Commonly slightly higher amounts of total carbohydrates, lipid and total crude protein contents were obtained in seeds of plants irrigated every 5 d than those of 10 d drying cycle while they were more or less comparable for the biofertilized and nonfertilized plants. Plants treated with nitrobin produced the highest level of genistein (isoflavonoid) under water regime I or II and the least level of quercetin (flavonoid).