【摘要】 在0～3次中耕条件下研究了中耕方式对土壤理化特性和玉米产量形成的影响。结果表明,多次中耕降低了0～20cm耕层土壤水分含量,玉米生育后期0～10cm土层土壤容重差异不显著,免中耕处理平均值高于其它处理;收获期10～20cm土壤容重处理间差异显著,在子粒形成期、乳熟期土壤容重差异不显著,其中各时期免中耕土壤容重最大。中耕对土壤孔隙度数量、比例有一定的调节作用。中耕降低了脲酶、中性磷酸酶、过氧化氢酶及转化酶的活性。少中耕有增产的趋势,并且可以降低生产成本、增加经济效益。更多还原

【Abstract】 The effects of different inter-tillage styles on physical and chemical characteristics of soil and maize yield formation were studied.The results showed that under multi-tillage,soil water content in 0-20 cm underground decreased,and soil enzyme activities of urease,neuter phosphorus,catalase and invert enzymes declined.The effect of tillage on bulk density was not significant at 0-10 cm soil layer during the period from anthesis to mature,but bulkdensity of zero tillage surpassed that of other treatments.There was not able effect on bulk density at 20-40 cm soil layer in harvest time,unapparent effect at grain filling stage,and bulk density under zero tillage was higher than that of other treatments.The grain yield was higher under minimum tillage than that under multi-tillage.Minimum tillage reduced production costs and increased economic benefits.更多还原