【摘要】 土壤中存在过多裂缝会增加水分入渗率和蒸发率,引起土壤中表层水分减少,深层渗漏增加,不利于作物生长。裂缝产生的原因与土壤结构、土壤含水量、土壤性质、气候变化等多种因素有关,为了研究翻埋秸秆对抑制土壤开裂的影响程度,进行了不同秸秆密度下的土壤裂隙度田间试验,通过剪切仪对采集的不同秸秆密度下的土体样品与无秸秆的土壤样品进行剪应力和压力测试,采用SAS和Excel软件对数据进行分析,发现,随着添加秸秆量的增加,土壤的抗剪强度和粘聚力不断提高,降低了土壤裂缝的宽度。更多还原

【Abstract】 Too much crack exist in the soil will increase the rate of water infiltration and evaporation rate,and will cause the soil surface moisture decreased,deep leakage,which is not conducive to crop growth.The factors of the cracks in the soil caused by soil structure,soil water content,soil properties,climate change and other factors.In order to prevent soil cracking,keep soil moisture,this article has carried on the soil under different density of straw fracture degree of field experiment.The shear stress and pressure test of the soil samples with different straw density were collected by shear apparatus.Data were analyzed by SAS and Excel software.The results showed that Along with the increase of the amount of straw,the shear strength and cohesion of the soil increased,and the width of soil cracks was reduced.更多还原