采伐方式对马尾松林下植被和土壤肥力的影响

采伐作业是森林经营中重要环节,不同采伐方式对森林植被和土壤肥力产生影响。通过对32年生马尾松林开展不同采伐方式试验研究,结果表明:随着采伐强度增大,林下植被得到恢复和发展,但皆伐方式导致植被严重破坏;土壤孔隙度、持水量等物理性质及全氮、水解氮、速效磷、速效钾等化学性质均随采伐强度增大而不断下降,土壤容重增加,皆伐使土壤理化性质恶化。

EFFECT OF HARVESTING SYSTEMS ON VEGETATION AND SOIL FERTILITY OF PINUS MASSONIANA

Harvesting operation is one of more important parts in the forest cultivation.It greatly affects underground plant and soil fertility. The experiment of different harvesting systems on thirty-two years old Pinus Massoniana was carried out.The results showed that underground plants were recovered and developed while clear cutting caused serious damage of underground plants with the increasing of harvesting, and physical properties such as soil pore degree、water-holding amount,chemical properties such as total N、available N、available P、available K reduced,when cutting intensity increased. Clear cutting made soil physical and chemical properties become worse.