毛竹林不同经营措施对林地土壤肥力的影响

对不同经营方式措施的毛竹林地土壤理化性质和林分涵养水源分析结果表明 :施肥能增加土壤有机质的积累 ,提高土壤全氮、水解氮、速效磷和速效钾的含量 ;深翻也有一定的改善作用。施肥和深翻后土壤团聚体和水稳定性团聚体含量均比对照高 ,土壤结构破坏率比对照低 ,土壤毛管孔隙度、非毛管孔隙度、通气度均比对照大 ,表现出土壤更为疏松通气。施肥和深翻后林地土壤最大持水量、毛管持水量、最小持水量和 0～ 4 0 cm厚土层贮水量比对照大 ,表现出较大的涵养水源作用

Impacts of Different Operation Patterns of Moso ( Phyllostachys pubescens ) on Soil Fertility

It shows by analyzing soil physi chemical properties and water conservation of Moso land under different operation measures that fertilizing can raise up accumulation of soil organic matter,enhance content of full nitrogen,hydrolyte nitrogen,fast acting phosphorus and fast acting potassium in soil,and deep ploughing has a certain effect on improving soil.As compared with control test after fertilizing and deep ploughing,content of soil aggregate and water stable aggregate is increased,soil structure dustruction rate is decreased,soil capillary and non capillary porosity,and soil aeration turns out to be much bigger which means that soil behaves looser and more aerated,meanwhile,maximum water hold capacity,capillary water hold capacity,and minimium water hold capacity and water storage capacity of soil horizon from 0 to 40 cm deep is bigger so that it functions well in water conservation.