Effects Of Salix Psammophila Checkerboard On Physical And Chemical Characteristics Of Sandy Soil

The paper basically analysis the influence on physical and chemical characteristics of sandy soil, after establishing Salix Psammophila Checkerboard, by compareding Salix Psammophila Checkerboard sand with contrast sand. The main results are as follows:1. Establishing Salix Psammophila Checkerboard can form soil crust, average thickness for 0.76㎝,and appear aggregate structure. Physical composition of sany soil is component of 0.15～0.1㎜.Establishing Salix Psammophila Checkerboard can decrease grace particle , accounting for 7.34%(P=0.042<0.05), obviously increase the fine powder,coarse powder and clay of soil surface, accounting for 59.71%(P=0.021<0.05),86.59%(P=0.0<0.01),30.78%(P=1>0.05), middle powder increase 2.08 times(P=0.0<0.01).It shows Salix Psammophila Checkerboard can control effectively sandstorm activity of earth's surface, keep the earth's surface from sandy crust, and benificaly form soil crust.2. After establishing Salix Psammophila Checkerboard, organic matter contain is significant higher than the contrast sand, accounting for 74.28%,68.96% in 0～30㎝ and 30～60㎝ depth; total nitrogen contain increase 2.42 times, and total potassium contain is significant higher than contrast sand, accounting for 40.85% in 0～30㎝ depth; it shows Salix Psammophila Checkerboard can improve fertility condition of sandy soil.3. Significant correlations are showed between soil physical properties and soil chemical proper ties. Water contain with fine clay is signification position correlation. Organic matter with total nitrogen tand otal potassium is signification position correlation, it shows organic matte is the materal basic of fertility condition of sandy soil. Clay and 0.2～0.15㎜,0.1～0.05㎜ particles with organic matter and total nitrogen are signification positive correlation, it shows organic matter and total nitrogen of sandy soil increase after contents of small partical in soil increase.