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利用1980-2004年乌兰布和沙区人工绿洲典型试验区土壤定位观测资料进行土壤养分的动态分析。结果表明:随着人工绿洲建设年代的增加,土壤有机质含量大幅度增加,土壤全氮、全磷、全钾含量总体上都呈增加趋势;土壤速效养分随绿洲化过程的深入总体上也呈明显的增加趋势。给出了耕作层0~30 cm土壤各养分增量变化的函数关系式,其中全磷增量、速效钾增量呈“S”型曲线增长。
The dynamic analysis of soil nutrients was carried out using the soil location observation data of the typical experimental area of artificial oasis in Wulanhabu and sandy areas from 1980 to 2004. The results showed that with the increase of artificial oasis age, the content of soil organic matter increased greatly, and the contents of total nitrogen, total phosphorus and total potassium in soil all tended to increase as a whole. The soil available nutrient with the process of oasis in general was also obvious Increasing trend. The functional relationship between nutrient increment of 0-30 cm soil layer in tillage soil was presented. The increment of total phosphorus and available potassium increased as curve of “S”.