【摘要】 为探讨玉米超高产的土壤肥力特性,改良土壤的理化性状,对辽宁省内已达到超高产地块的土壤物理性质进行了调查分析。结果表明:玉米的产量与土壤容重和土壤总空隙度有极显著的相关性。超高产土壤的耕层厚度都大于25 cm,土壤容重一般在1.10~1.31 g/cm3范围内,田间持水量都大于22%,孔隙度达到50.94%以上,粉粒、黏粒所占比例超过了80%,土壤的pH值在5.56~7.91范围内。更多还原

【Abstract】 In order to understand the soil fertility characteristics on super-high-yield of maize and improved the soil conditions,we investigated and analysised the soil physicalreach super-high-yield investigation and analysis of the soil physical properties of reach super-high-yield in Liaoning province.The result showed that maize yield and soil bulk density and soil total porosity was significant correlation,and field capacity,particle composition,pH had no significant correlation.High yield soil is greater than 25 cm thick topsoil,Soil bulk density in the general context in 1.10~1.31 g/cm3,Greater than 22% field capacity,Up 50.94 percent over the porosity,silt,clay percentage over 80%,soil pH values in the 5.56~7.91 range.更多还原