不同经营措施对冀北山地华北落叶松林枯落物持水性能的影响

Effect of Water-holding Capacity of Litter under Larix pricipis-rupprechtii Forest in Different Mangement Measures in North Hebei Mountain Area

为了揭示不同经营措施对冀北山地华北落叶松人工林持水能力的影响,对不同经营措施下华北落叶松枯落物储量、枯落物最大持水量、自然含水量和有效拦蓄量进行了研究。结果表明:不同经营措施下枯落物储量及持水特性均随着时间的延长表现出增加的趋势,枯落物储量增长率表现出带状皆伐改造>封禁促进植被恢复>群团状择伐改造>人工促进更新>未封禁,封禁2a枯落物储量增长率为2.94%～10.21%。总体来看枯落物最大持水量、自然含水量和有效拦蓄量增长率,表现出群团状择伐改造>带状皆伐改造>人工促进更新>封禁促进植被恢复>未封禁的趋势。封禁2a后,增长率分别为0.48%～5.58%、0.13%～10.40%、-0.14%～5.82%,表明封禁措施的有效性。同时表明这几种经营措施是冀北山地华北落叶松低效人工林改造的有效途径。

Litter storage,maximal water-holding capacity,natural moisture content,effective dammed-up of litter of Larix pricipis-rupprechtii man-made forest were studied in order to disclosure effect on water-holding capacity of litter of Larix pricipis-rupprechtii forest under different treatments. The results showed that litter storage and water-holding capacity incresesd with time prolong,litter storage were that banding clear cutting〉manual promote renew〉gap selection cutting〉closed promote vegetation〉no-closed. And its rate of growth between 2.94% and 10.21% after closed 2 years. In general,the maximal water-holding capacity,natural moisture content,effective dammed-up,gap selection cutting〉banding clear cutting〉manual promote renew〉closed promote vegetation〉no-closed,which rate of growth one bye one between 0.48%,0.13%,-0.14% and 5.58%,10.40%,5.82% after closed 2 years. Its approved closed measure was valued. These treatments are effectives measures for vegetation rebuild of Larix pricipis-rupprechtii forest in North Hebei mountain area.