1.College of Ecology and Environmental Science,Inner Mongolia Agricultural University,010019,Hohhot;2.International Bamboo and Rattan Network Center,100102,Beijing;3.Landscaping Department of Baotou City,014000,Baotou,Inner Mongolia Autonomous Region;4.Huaneng Yimin Coal and Electricity Co.Ltd,021130,Hulunbeier,Inner Mongolia Autonomous Region: China
Abstract：In order to known the effect of Poly Lactic Acid(PLA) sand barrier on soil hardness,the topsoil hardness of PLA sand barrier dunes,traditional straw sand barrier dunes and bare dunes were investigated,and the topsoil hardness on windward slope,slope top and lee slope were compared between PLA sand barrier and straw sand barrier dunes.The results showed that: the topsoil hardness of PLA barrier dunes was significantly higher than straw barrier ones(P<0.001),and both were significantly higher than the unpaved ones(P<0.001);The topsoil hardness of 2 m×2 m and 1 m×1 m PLA sand barrier were near and significantly smaller than the 3 m×3 m ones(P<0.01),while that of three kinds of straw sand barriers had no differences;The topsoil hardness of two kinds of sand barrier dunes in different parts had a similar trend,soil hardness of the windward slope was the largest,that of slope top was the second and that of lee slope was the minimum;Top soil hardness in single barrier grid of the PLA sand barriers and straw sand barriers was uneven distribution.
2010, Vol. 8 
