摘要
采用工程与生物措施相结合的方法,在黄土丘陵半干旱区进行柠条灌木林的建设与土壤水分过耗及调控恢复的定位试验研究。结果表明:生物调控最佳立体配置模式水平阶整地为柠条-披碱草、柠条-草木樨、柠条-芨芨草类型;水平沟整地为柠条-芨芨草、柠条-草木樨类型;鱼鳞坑整地为柠条-草木樨、柠条-芨芨草、柠条-本氏针茅类型。水平阶整地0～500cm土层的土壤含水量比对照提高1.6％～5.0％;水平沟整地提高1.5％～3.0％;鱼鳞坑整地提高1.1％～2.7％。工程整地栽植5年、10年、15年的柠条灌木林0～500cm土层的土壤储水量年生长初期分别比对照提高了82.84mm、56.63mm、210.66mm,年生长终期增加了15.96mm、67.64mm。50.36mm。灌、草生物量分别比对照提高97.09％～104.9％和320％～650％。
Construction of Caragana korshinskii vegetation and studies on the excessive depletion and regulative recovery were performed with the conjunction of engineering and biotic measures. The results showed that the optimum stereoscopic collocation model with the level-step was Caragana korshinskii-Clinelymas dahuricus , Caragana korshinskii-Mililotus suaveolens and Caragana korshinskii-Achnatherum splendent, the optimum one by level-gouge was Caragana korshinskii-Achnatherum splendens and Caragana korshinskii-Mililotus suaveolens and the optimum one by fish-scale pits was Caragana korshinskii-Mililotus suaveolens, Caragana korshinskii-Achnatherum splendens and Caragana korshinskii-Stipa bungeana . Compared as CK the measure could enhance soil water content of 0 - 500 cml .6% -5.0% by level-step, 1.5% - 3.0% by gouge and 1.1% - 2.7% by fish-scale. At the initial growth stage of 5th, 10th, 15th year, soil water-storage capacity of 0 - 500 cm enhanced 82.84 mm, 56.63 mm, 210.66 mm respectively compared to CK, while in the final stage, enhanced 15.96 mm, 67.64 mm, 50.36 mm respectively. The biomass of shrubs and grass was increased for 97.09% - 104.9% and 3.2-6.5 times.
出处
《中国水土保持科学》
CSCD
2003年第3期10-14,共5页
Science of Soil and Water Conservation
基金
"十五"国家科技攻关计划项目(2001BA508B19)
国家重点基础研究发展规划"973"项目(G2000018606)
国家高技术研究发展计划(863计划项目2002AA6Z3301)
国家自然科学基金重点项目(30230290)
中国科学院知识创新工程重大研究项目(KZCX2-411)
国家林业局荒漠化监
关键词
半干旱区
整地方式
灌草配置
土壤水分
生物量
柠条
semi-arid area
shrubs and grass patterns
land preparation methods
soil moisture
