坡缕石粘土胶体对沙生植物生长的影响  

Impact of palygorskite-bearing clay gel on the growth of psammophyte

作　　者：周清[1] 尹琳[1] 李海勇[1] 李响[1] 

机构地区：[1]南京大学地球科学系,江苏南京210093

出　　处：《干旱区地理》2008年第1期117-121,共5页Arid Land Geography

基　　金：国家自然科学基金(50474036);南京大学测试基金

摘　　要：以改良库布齐沙漠为目的,用地产低品位坡缕石粘土制备了粘土胶体,用来提高在沙漠化土壤环境下草籽的发芽率、生长情况和存活时间。铺洒粘土胶体的条件下播种沙打旺(Astragalusadsurgens Pall)时,其发芽率为20%,存活时间达40天;而播种紫花苜蓿(Medicago sativa L.)时发芽率为80%,存活时间近20天。本研究为改良沙漠化土壤提供了一种实用的新方法,同时为低品位坡缕石粘土找到了新的应用领域。A kind of clay gel made from barren palygorskite clay at the periphery location was employed to control land desertification of the Hobq Desert, Inner Mongolia, China. The capabilities of germination for some plant seeds are enhanced after the clay gel being used. The germination rate, height of plants developed and period of seedling living are increased. The planting of astragalus adsurgens seeds show good result with 20% germination rate and 40 days living span. Alfalfas seeds exhibit 80% germination rate and 20 days living span. This study provides a practicable method both for desert control and utiliztion of barren palygorskite clays.

关 键 词：坡缕石粘土 胶体 沙生植物 

分 类 号：Q945[生物学—植物学]