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)

Water relations, transpiration rate, stomatal behaviour and leaf sap pH of Aloe vera and Aloe eru

Egyptian Journal of Biology Vol.3 2001: 140-14

Growth and aloin production of Aloe vera and Aloe eru under different ecological conditions

Egyptian Journal of Biology Vol.3 2001: 149-15

Optimized Potential of Utilization Efficiency and Productivity in Wheat by Integrated Chemical Nitrogen Fertilization and Stimulative Compounds

Foliar sprays application is an important crop management strategy, which could help to maximize yield and other beneficial substances. Therefore, a field experiment was conducted at Kafrelsheikh University research farm, Egypt, to study the effect of stimulating compounds (control, salicylic acid and ascobien) and nitrogen levels (0, 57.5, 115, 172.5 and 230 kg N ha-1) on yield and nitrogen utilization efficiency of wheat. Results indicated that spraying of ascobien and increasing nitrogen level had significant effect on yield traits. Interaction between stimulating compounds and nitrogen were achieved progressive increases in all yield traits, furthermore, the magnitude of increments was much more pronounced in response to salicylic acid and control treatments in both seasons. It was observed no statistically significant difference between 172.5 and 230 kg N ha-1 in both seasons. A significant interactive effect were observed on grain N uptake, whole plant N uptake, nitrogen harvest index (NHI), nitrogen utilization efficiency (NUtE) and nitrogen use efficiency (NUE) by using foliar spraying combined with N fertilizer. Grain N uptake and whole plant N uptake were closely correlated with nitrogen under stimulating compounds, whereas ascobien with 172.5 kg N ha-1 was more effective than salicylic acid in both seasons. Interestingly, foliar spraying of ascobien and N level of 172.5 kg ha-1 was the optimal and could be a useful to improve the efficiency of N-fertilizer and it can be saved 57.5 kg N ha-1. Consequently, could be the key to reduce the need for chemical fertilizers and decrease the cost of production