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Effects of different tillage systems and herbicide on soil microflora ofLablab bean rhizosphere

机译:不同耕作制度和除草剂对扁豆根际土壤微生物区系的影响

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摘要

A long term field study was conducted at the Agronomy Farm, Department of Agronomy, Dr. B.S. KKV, Dapoli (Maharashtra) in Rabi season lablab bean crop to evaluate the effect of different tillage systems visa-vis different weed control measures on thesurvival and growth of total bacteria, total fungi, total free living nitrogen fixers and total phosphate solubilizers in rhizosphere soil. Four types of tillage systems were evaluated, viz. (i) Conventional-conventional (ii) Conventional-zero (iii) Zero-conventional and (iv) Zero-zero tillage systems. Among weed control measures, comparative effects of hand weeding and recommended herbicides application (oxadiargyl as pre-emergence) were tested along with weedy check. The results of the investigation revealed that tillage systems didnot significantly influence microbial population. The marginal growth of different microorganisms was observed in conventional-conventional tillage system, whereas minimum was in zero-tillage system. There were no adverseeffects of herbicide use on all the estimated microbial population at all the stages of the crop. In short use of recommended herbicide oxadiargyl at 0.12 kg/ha had no long term adverse effects on rhizosphere microflora of lablab bean crop.
机译:B.S.博士在农学系农学农场进行了长期的实地研究。 KKV,Dapoli(马哈拉施特拉邦)在拉比季节的扁豆作物上评估了不同耕作制度对不同杂草控制措施对根际土壤中总细菌,总真菌,总游离生活固氮剂和总磷增溶剂的存活和生长的影响。评估了四种耕作系统,即。 (i)常规-常规(ii)常规-零耕种(iii)常规-零耕种和(iv)零-零耕种制度。在杂草控制措施中,对人工除草和推荐使用除草剂(草二炔为发芽前)的比较效果以及杂草检查进行了测试。调查结果表明,耕作制度对微生物种群没有显着影响。在常规-传统耕作系统中观察到了不同微生物的边缘生长,而在零耕作系统中则观察到了最小限度的增长。在作物的所有阶段,除草剂的使用对所有估计的微生物种群均无不利影响。短时间使用推荐的除草剂草二恶唑(0.12 kg / ha)对扁豆类作物的根际微生物区系没有长期不利影响。

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