科尔沁沙地生物结皮与其他植被覆盖耗水率的研究  

Study on Water Consumption Rate of Biological Crust and Other Vegetation Cover in Horqin Sandy Land

作　　者：洪光宇[1,2,3] 王晓江 张雷[1,2] 武永智 李卓凡[1,2] 海龙 高孝威[1,2] 

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]内蒙古大青山森林生态系统国家定位观测研究站,内蒙古呼和浩特010010 [3]内蒙古农业大学草原与资源环境学院,内蒙古呼和浩特010019

出　　处：《内蒙古林业科技》2017年第4期14-20,共7页Journal of Inner Mongolia Forestry Science and Technology

基　　金：内蒙古自治区科技计划项目"毛乌素沙地生态修复技术集成与示范";林业公益性行业科研专项(201304206)资助

摘　　要：本研究对科尔沁沙地生物结皮与差巴嘎蒿灌木林、小叶锦鸡儿灌木林、樟子松疏林、草地、裸沙0~180 cm土壤层的水分进行调查。研究表明:雨后10 d生物结皮样地的耗水率比差巴嘎蒿灌木林、小叶锦鸡儿灌木林、樟子松林、草地和裸沙样地分别降低64.00%、76.85%、61.17%、78.21%和19.07%;生物结皮样地相对其他植被覆盖样地在不同层次(0~40 cm、80~180 cm)土壤的耗水量最低,40~80 cm土壤层裸沙样地耗水量最低,但与生物结皮样地没有差异性;雨后第4 d差巴嘎蒿灌木林、小叶锦鸡儿灌木林、樟子松林、草地样地在0~40 cm土壤层水分显著开始下降,裸沙样地在20~40 cm土壤层,生物结皮样地在0~20 cm土壤层水分含量显著降低;差巴嘎蒿灌木林样地80~100 cm土壤层从第3 d开始水分显著下降,小叶锦鸡儿灌木林样地在100~120 cm、140~180 cm土壤层从第2 d开始水分显著下降,樟子松林样地在60~120 cm土壤层从第3 d开始水分显著下降,草地样地在40~60 cm、80~100 cm土壤层从第3 d开始水分显著下降。Through investigating the soil water in soil layer of 0 ~ 180 cm in biological crust,Artemisia halodendron shrubs,Caragana microphylla shrubs,Pinus sylvestris var. mongolica stands,grassland and bare sand,the results show that in 10 days after the rain,the water consumption rate of biological crust has been lower than Artemisia halodendron shrubs,Caragana microphylla shrubs,Pinus sylvestris var. mongolica stands,grassland and bare sand by 64. 00%,76. 85%,61. 17%,78. 21% and 19. 07% separately. The water consumption in biological crust sample plot is the lowest at the soil layer of 0 ~ 40 cm and 80 ~ 180 cm,the one in bare sand sample plot is the lowest at the soil layer of 40 ~ 80 cm,without difference with biological crust sample plot. In the fourth day after the rain,the soil moisture at the soil layer of 0 ~ 40 cm has begun to decrease obviously in these sample plots such as Artemisia halodendron shrubs,Caragana microphylla shrubs,Pinus sylvestris var. mongolica stands and grassland,the one at the soil layer of 20 ~ 40 cm in bare sand sample plot and the one at the soil layer of 0 ~ 20 cm in biological crust sample plot has begun to decrease obviously. The soil moisture at the soil layer of 80 ~ 100 cm in the sample plot of Artemisia halodendron shrubs has begun to decrease obviously from the third day. The soil moisture at the soil layer of 100 ~ 120 cm and 140 ~ 180 cm in the sample plot of Caragana microphylla shrubs has begun to decrease from the second day. The soil moisture at the soil layer of 60 ~ 120 cm in the sample plot of Pinussylvestris var. mongolica stands has begun to decrease from the third day. The soil moisture at the soil layer of 40 ~60 cm and 80 ~ 100 cm in the sample plot of grassland has begun to decrease from the third day.

关 键 词：生物结皮 土壤水分 TDR 科尔沁沙地 

分 类 号：S152.7[农业科学—土壤学]