土壤管理方式对李园土壤理化性质影响研究

Effects of Soil Managements on Soil Physical and Chemical Properties in Plum Orchards

研究了四川大英县不同土壤管理方式下李园的土壤理化性质 ,结果表明 :不同土壤管理方式下 ,夏旱期间土壤含水量以刈割覆盖处理最高。刈割压埋、畜粪还园处理在土壤保温和降温方面的效果不如刈割覆盖处理明显 ,但优于清耕处理。各处理间土壤容重变化较大 ,0～ 2 0cm土层畜粪还园处理的土壤容重较清耕减少 0 4 5 g/cm3 。土壤养分指标值较试验前均有不同程度地提高 ,各处理土壤养分值以畜粪还园处理为最好。

Soil's physical and chemical properties of different soil managements in the plum orchard of Sichuan Daying are studied, and the results show: during the summer drought period, as far as water-containing soil layers are concerned, among different soil management modes, mowing and covering contains the highest moisture content. In terms of the soil's thermal retardation and cooling, mowing and burying and returning the livestock's feces to the orchard are not as effective as mowing and covering, but more effective than clean tillage. Among these managements, the soil's bulk densities vary much. Compared with clean tillage, in the soil layer ranging from zero to 20、cm deep, the soil's bulk density is 0.45、g/cm3 less when returning the livestock's feces to the orchard. There are commonly variant levels of improvement in all the soil's nutrient indexes when compared with those before the treatments. All the processed nutrient indexes are best in returning the livestock's feces to the orchard.