摘要
为了了解间伐对华北落叶松人工林凋落物和土壤理化性质的影响，利用试验测定和定量统计的方法，分析比较了河北省塞罕坝机械林场间伐和未间伐华北落叶松人工林凋落物层和土壤层（0～10 cm、10～20 cm ）的理化性质，结果显示：与未间伐林分相比，50％强度间伐6 a后林分内凋落物层生物量、质量含水量、有机质含量和全氮含量分别提高了17．25％、6．05％、9．08％、31．94％；土壤层的质量含水量、土壤容重和有机质含量有所上升（0～10 cm 土壤层分别增加4．84％、11．11％、15．67％；10～20 cm 土壤层分别增加10．25％、12．50％、28．97％），而全氮含量呈下降趋势（0～10 cm土壤层减少20．83％；10～20 cm土壤层减少16．67％）；土壤pH值亦有所下降。研究进一步证实，通过间伐能够增加地表凋落物生物量，改变有机质分解速率，从而在一定程度上影响土壤的理化特性。
The influence of thinning on physical and chemical properties of litter and soil from Larix principis‐rupprechtii plantations in Saihanba Mechanized Forestry Centre of Hebei was studied by experimental determination and quantitative statistics .The results showed that compared with the control plots ,after six years of thinning 50% ,the litter biomass , mass water content ,organic content and total nitrogen content of litters increased 17 .25% , 6 .05% ,9 .08% and 31 .94% in thinned plots ,respectively .In soil layers ,the soil mass wa‐ter content ,soil bulk density and organic content were increased by 4 .84% ,11 .11% and 15.67% in 0~10 cm layers while there was an increase of 10 .25% ,12 .50% ,and 28 .97% in 10~20 cm layers ,respectively .But the soil total nitrogen content decreased 20 .83% and 16.67% in that two layers of soil ,and the soil pH value also decreased .The above proved that forest thinning increased litter biomass ,changed the rate of organic decomposition ,and influenced the litter and soil characteristics to some degree .
出处
《河北林果研究》
2014年第4期351-355,共5页
Hebei Journal of Forestry and Orchard Research
基金
"十二五"国家科技支撑计划"华北土石山区森林可持续经营技术研究与示范"(2012BAD22B0304)
关键词
间伐
华北落叶松人工林
凋落物
土壤
理化性质
塞罕坝机械林场
thinning
Larix principis-rupprechtii plantations
litter
soil
physical and chemical properties
Saihanba Mechanized Forestry Centre
