沙障对风蚀坑种子库特征的影响研究  

Effects of Sand Barriers on Characteristics of Seed Bank in Blowout

作　　者：薛博[1,2] 袁立敏 黄海广[1,2] 杨制国 XUE Bo;YUAN Li-min;HUANG Hai-guang;YANG Zhi-guo(Inner Mongolia Academy of Forestry,Hohhot 010010,China;Hunshandake Sandy Land Ecosystem Position Research Station,Duolun,Inner Mongolia,Duolun 027300,China)

机构地区：[1]内蒙古自治区林业科学研究院,内蒙古呼和浩特010010 [2]内蒙古多伦浑善达克沙地生态系统国家定位观测研究站,内蒙古多伦027300

出　　处：《内蒙古林业科技》2020年第3期13-18,共6页Journal of Inner Mongolia Forestry Science and Technology

基　　金：国家重点研发计划“中国北方半干旱荒漠区沙漠化防治关键技术与示范”(2016YFC05009)。

摘　　要：以浑善达克沙地东南缘的风蚀坑为研究对象,通过野外取样与室内萌发试验相结合的方法,测定了风蚀坑不同类型沙障内土壤种子库种类、数量,对比分析了不同类型沙障防护风蚀坑土壤种子库特征。结果表明:沙障能够有效提高风蚀坑内土壤种子库种类与数量;透风型沙障防护的风蚀坑土壤种子库数量显著高于对照,直播沙障的最高,而不透风型沙障与对照无显著差异;风蚀坑内上部、中部土壤种子库数量最多,下部最少。Taking the blowouts in the southern edge of Hunshandake Sandy Land as research object,combining field sampling with indoor germination test,we investigated the type and quantity of seed bank in blowouts protected by sand barriers,and contrasted the characteristics of seed bank in the blowouts of different types of sand barriers.The results show that sand barrier can increase the type and quantity of seed bank in blowouts greatly.The quantity of seed bank in blowouts with drafty sand barriers is significantly more than the control.The quantity of seed bank in direct-sowing sand barriers is the most.And the non-drafty sand barriers has no significant difference with the control.The quantities of seed bank in top and middle of blowout are more than that in bottom.

关 键 词：土壤种子库 透风型沙障 风蚀坑 浑善达克沙地 

分 类 号：S157[农业科学—土壤学]