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据全国第二次土壤普查1460个县10.7亿亩耕地调查成果资料汇总可知,土壤无障碍因素的优质地只占21%;土镶有机质<0.6%的耕地约占10%,潜育化水稻土占3%,含盐>0.3%占5%,低洼易涝占6%,水土流失占34%,沙化占7%.耕地土壤肥力水平不高,缺磷耕地占59%,缺钾占23%,有14%的耕地磷钾均缺.土壤资源的保护和利用改良问题十分严峻.加强地力建设,提高土壤肥力是今后方向性措施;坡耕地改造,控制水土流失应列为首要改造的对象;现有土壤测试中心可以满足土壤普查深化和普查成果应用的要求.土壤资源是国土的主要组成部分,因此本文主题必然是国土整治中的关键问题.
According to the survey data of 10.7 million mu of arable land in 1460 counties in the second national soil census, only 21% of the excellent quality of the soil is accessible, while about 0.6% of the arable land contains about 0.6% of the organic matter, Accounting for 3%, salinity> 0.3% 5%, low-lying flood 6%, soil erosion 34%, desertification 7%. Cultivated soil fertility level is not high, P deficit of 59%, potassium deficiency accounted for 23% , 14% of the cultivated land is deficient in both phosphorus and potassium, and the problems of the protection and utilization of soil resources are very serious.It is the direction measure to strengthen soil fertility construction and improve soil fertility. The existing soil testing center can meet the requirements of deepening the census of soil and applying the results of the census.The soil resources are the main components of the territory, so the subject of this paper is a key issue in the land consolidation.