利用沙尘暴进行荒漠化草原表土再造技术原理及实践

Principle and Practice on Re-building Desertification Grassland Topsoil by Dust-storm

依据风沙学原理,利用沙尘暴现象对内蒙古荒漠草原进行了表层土壤再造试验。采用地表撒松散杂草(秸秆)后用尼龙网罩固定的方法,拦截沙尘暴所携带的尘土。再造后的土壤掩埋了裸露的植物根系和地表面的砾石,比对照土壤有效锌增加114.8%、有机质增加33.3%、全氮增加77.1%、有效磷增加150.0%、速效钾增加7.8%、pH值降低了1.3%。此方法为如何利用沙尘暴这一自然现象开辟了新的思路。

Based on the principles of the blown sand,topsoil re-building trials on the Inner Mongolian desert grassland by dust-storm phenomenon were carried out.The loosely weed（straw）with nylon net cover fixed was put on the earth surface to intercept dust carried by dust-storm.The re-built soil buried the bare plant root and the ground surface of gravel,compared with the controlled soil,available Zn of the new soil increased by 114.8%,organic matter increased by 33.3%,total nitrogen increased by 77.1%,available P increased by 150.0%,rapidly available K increased by 7.8%,and pH value lowered by 1.3%.This method that how to take advantage of this natural phenomenon,dust-storm,opened up a new way of thinking.