辽西北地区土地退化成因及其对土壤性状影响

Formation cause of land degeneracy in district of northwest of Liaoning and effect on soil shape and properties

为了解决辽西北地区土地退化对土壤性状影响的问题,采用对比分析、定量研究的方法,得出了随着土地退化程度的加剧,0～10cm土层中大颗粒(砂粒)所占比重逐渐增加,而细小颗粒逐渐减少,土壤风蚀沙化的表征逐渐突出的结果：而且土壤有机质含量、全氮、全磷、碱解氮、速效磷的土壤养分含量亦基本上呈逐渐降低的趋势。所以欲遏制土地荒漠化的程度、范围和速度,必须在控制当地人口和牲畜数量的前提下,改变传统的粗放式的土地利用方式,因地制宜科学利用土地,加强土地经营管理,使当地生态环境得以逐步改善,保证农牧业的可持续发展。

In order to solve the problem of the effect the land degeneracy on the soil shape and properties of, with the methods of comparative analysis and fixed quantity research is conducted.The result is obtained that with the aggravation of the land degeneracy,the specific gravity occupying the sand grain in the soil layer of 0～10cm will increase gradually,but the small grain will reduce gradually and the token of the sandy will protrude gradually;And the soil nutrient content of the organic nature content,the nitrogen,the phosphorus,the alkaline nitrogen and the quick results phosphorus will trend to reduce gradually basically.So if we want to contain the level,the scope and the speed of the land desolateness,we must under the premise of controling the local population and the livestock quantity,change the land utilization method of traditional extensive type, reasonably and scientifically utilize the land,strengthen the land business administration,make the local ecological environment improve step by step,then keep the development going on of agriculture and animal husbandry。