Effect of Microbial Inoculation and Bentonite Amendments on Growth, Enzyme activity and Yield of cowpea cultivated in sandy soil

S. A. Abd-elgwad
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引用次数: 4

Abstract

A field experiment was conducted twice at the farm of Environmental Studies and Research Institute, Sadat City University, Egypt, during the two consecutive seasons of 2015 and 2016 to study the effect of different additives of bentonite (0, 3, 6 and 9 t fed.-1), and microbial inoculation with Bradyrhizobium sp. and Azospirillum brasilense either alone or mixed on vegetative parameters, enzyme activity and yield of cowpea plants. Results revealed that co-inoculation treatment and addition of 9 ton fed.-1 bentonite significantly enhanced plant height, number of branches, fresh and dry weight of plant in both seasons compared with the control at 60 days from sowing and this increase reflected on enzyme activity which attained 25.56, 27.66 (µmol/ C2H4/h/g dry nodules) and 50.93, 54.57 (µg TPF/g dry soil/h) for nitrogenase (N2-ase) and dehydrogenase (DHA) in the two growing seasons, respectively. On the other hand, the highest total seed yield of cowpea was recorded from use the co-inoculation with 9 ton ton/fed which was 0.679 and 0.682 (ton fed-1) for seed yield and 0.316, 0.324 (ton fed-1) for straw yield during 2015 and 2016 seasons, respectively. Consequently, it is to recommend that mixture inoculate with Bradyrhizobium sp. and Azospirillum brasilense and addition of 9 ton fed.-1 bentonite could be improving crop growth of cowpea and improve sandy soil fertility.
微生物接种和膨润土改性对沙土豇豆生长、酶活性和产量的影响
2015年和2016年连续两季在埃及萨达特城市大学环境研究与研究所的农场进行了两次田间试验,研究了不同添加剂膨润土(0、3、6和9 t投喂),以及单独或混合接种慢生根瘤菌和巴西氮螺旋菌对豇豆植株营养参数、酶活性和产量的影响。结果表明,与对照相比,共接种和添加9吨投喂膨润土在播种后60 d显著提高了两季植株的株高、枝数、鲜重和干重,这主要体现在两季氮氧化物酶(n2酶)和DHA酶活性分别达到25.56、27.66(µmol/ C2H4/h/g干根瘤)和50.93、54.57(µg TPF/g干土/h)。另一方面,在2015年和2016年两季,共接种9吨/饲料的豇豆总种子产量最高,种子产量分别为0.679和0.682(吨饲料-1),秸秆产量为0.316和0.324(吨饲料-1)。综上所述,混合接种缓生根瘤菌和巴西固氮螺旋菌,并添加9吨饲用膨润土,可促进豇豆作物生长,提高沙质土壤肥力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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