麦草覆盖对果园土壤理化性质影响的研究

The Effect of Covering Straw in Orchard on Soil Physical and Chemical Characteristics

对覆草 3～ 5 a的苹果园和葡萄园土壤进行采样分析。结果表明 ;果园覆草后土壤有机质提高 0 .92～ 3.33g/ kg,全氮和全磷的平均值分别提高 0 .194mg/ kg和 0 .140 mg/ kg。土壤容重降低 0 .0 68g/ cm3 ,田间持水量增加2 .82 % ,CEC提高 1.82 cmol/ kg,p H变化不显著 ,对土壤有效养分的影响达极显著水平 ,影响大小的顺序为有效钾>有效磷 >

The soil of apple orchard and grape orchard which were covered by straw for 3~5 years were analyzed. The results indicated as below: After covering straw the content of soil organism increased by 0.92 ~ 3.33 g/kg. Soil bulk density decreased by 0.068 g/cm 3. Field moisture capacity increased by 2.82 % and CEC 1.82 cmol/kg. But pH was not affected obviously. The content of the total N increased by 0.194 mg/kg and that of the total P did by 0.14 mg/kg. On the other hand contents of soil available nutrients were affected obviously in the order of available K >available P>available N.