Dinitrogen Fixation and Growth of Faba Bean (Vicia Faba) Lima Bean (Phaseolus Limensis) and Soybean (Glycine Max) as Affected by Three Insecticides PDF Download
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Author: Rana Tayyar Publisher: ISBN: Category : Nitrogen Languages : en Pages : 160
Book Description
Insecticides when applied in combination with rhizobial inoculation on legume seeds might be harmful to the Rhizobium and may reduce biological dinitrogen fixation (N2-fixation). In a pot experiment in 1986, three insecticides were tested for their effects on N2-fixation and growth of faba bean (Vicia faba), lima bean (Phaseolus limensis) and soybean (Glycine max). The chemicals were carbofuran (soil applied), actellic 2% and malathion(seed applied) at the rates of 4 g/m, 0.5g/kg of seeds and 2cc/kg of seeds respectively. Actellic showed no significant effect on any of the characters studied. On the other hand, carbofuran significantly increased the foliage dry weight, nodule number, nodule dry weight, pod number and seed yield in most cases. In contrast, malathion significantly decreased the nodule number, nodule dry weight, pod number and seed number particularly in soybean. By regression analysis, a highly significant and positive relationship was observed between shoot % nitrogen on one hand and foliage dry weight and nodule number on the other in almost all treatment combinations. In addition, a positive and significant relationship was also found between foliage dry weight, nodule number and nodule dry weight at the flowering, pod initiation and pod filling stages.
Author: Rana Tayyar Publisher: ISBN: Category : Nitrogen Languages : en Pages : 160
Book Description
Insecticides when applied in combination with rhizobial inoculation on legume seeds might be harmful to the Rhizobium and may reduce biological dinitrogen fixation (N2-fixation). In a pot experiment in 1986, three insecticides were tested for their effects on N2-fixation and growth of faba bean (Vicia faba), lima bean (Phaseolus limensis) and soybean (Glycine max). The chemicals were carbofuran (soil applied), actellic 2% and malathion(seed applied) at the rates of 4 g/m, 0.5g/kg of seeds and 2cc/kg of seeds respectively. Actellic showed no significant effect on any of the characters studied. On the other hand, carbofuran significantly increased the foliage dry weight, nodule number, nodule dry weight, pod number and seed yield in most cases. In contrast, malathion significantly decreased the nodule number, nodule dry weight, pod number and seed number particularly in soybean. By regression analysis, a highly significant and positive relationship was observed between shoot % nitrogen on one hand and foliage dry weight and nodule number on the other in almost all treatment combinations. In addition, a positive and significant relationship was also found between foliage dry weight, nodule number and nodule dry weight at the flowering, pod initiation and pod filling stages.
Author: Wendela El-Kareh Publisher: ISBN: Category : Fava bean Languages : en Pages : 230
Book Description
A field experiment was conducted at AREC to determine the effects of microenvironmental changes on seed quality and yield of faba beans. Three row spacings (30, 50, and 75 cm), three plantings dates (11 December, 20 January and 5 February) and four nitrogen fertilizer levels (0, 45, 90, and 135 kg/ha) were used to induce variability in the microenvironment of the canopy. Analysi s of variance revealed significant to very highly significant effects of the three factors and their interactions on percentages of glucosides in green seeds: latest planting date, highest nitrogen fertilizer level and widest row spacing combined, lead to highest percentages. The effects on glucoside percentages in dry seeds ranged from non significant to very highly significant. Glucoside percentages were found to be most influenced by delaying planting till 5 February. Yield and primary yield components were generally very highly significantly affected by the three factors and their interactions. Simple correlation coefficients between glucoside percentages in green seeds and yield and primary yield components were highly significant and negative at the third planting date, but non significant at the first two dates. The correlation coefficients between the same variables were negative at the three row spacings. Path analysis was carried out to determine direct and indirect effects on the basis of some significant correlation coefficients and path diagrams hypothesizing causal relations. The number of pods per plant had the largest direct negative effect on glucoside percentages in green seeds.
Author: Rana Tayyar
Author: Rana Tayyar
Author: 
Author: American University of Beirut
Author: Vernon Rodd
Author: 
Author: J.-D. Gu
Author: 
Author: Vernon Rodd
Author: Wendela El-Kareh
Author: Kenneth K. Nyalemegbe