摘要
通过对10年生尾叶桉Eucalyptus urophyla人工林林下枯落物的持水量、持水速率和土壤物理性质的取样分析,研究了林下枯落物和土壤的持水性能。结果表明:该林分的枯落物储量为14.15 t.hm-2,最大持水量为3.07mm,有效拦蓄水量为1.90 mm,半分解层的最大持水率、最大持水量、有效拦蓄率和有效拦蓄水量均大于未分解层;整个持水过程中,半分解层的持水量和持水速率一直大于未分解层;随着林下土壤深度的增加,土壤容重逐渐增大,孔隙度减小,持水量也随之减小,其土壤持水能力与土壤容重和土壤层深度基本呈反比;由于人工林内抚育经营活动较频繁,使枯落物分解迅速,而同时生物圈的活动对土壤的物理性质也产生着重要影响。
Through sampling and determination of the litter＇s water holding rate, water holding quantity and the physical properties of the soil, the water holding capacity of 10-year-old Eucalyptus urophylla plantation＇s litter and soil was studied. The results show that the stands＇ litter reserve was about 14.15 t. hm2, maximum water holding quantity was 3.07 mm, effective impoundment of water was 1.90 mm, and semi-decomposed layer＇s maximum water holding rate, maximum water holding quantity, effective impoundment rate and effective impoundment quantity of water were greater than un-decomposed layer＇s; the semi-decomposed layer＇s water holding quantity and water-holding rate has been being greater than the un-decomposed layer＇s during the whole process of water holding; gradually, the stands＇ soil bulk density increased, thesoil＇s porosity reduced, the soil＇s water holding capacity also decreased as the depth increased, soil＇s water holding capacity was inversely proportional with soil bulk density and soil layer＇s depth basically; the tending operations of the plantation was frequent, so its litter decomposed rapidly, while the biosphere activities also had an important impact on soil＇s physical properties.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2013年第3期98-102,共5页
Journal of Central South University of Forestry & Technology
基金
林业公益性行业科研专项(201104003)
国家林业局公益性行业科研专项(200904045)
国家自然科学基金(31060114)
云南省自然科学基金(2008ZC094M)
关键词
尾叶桉人工林
枯落物
土壤
持水性
Eucalyptus urophyla plantations
litterfall
soil
water holding capacity
