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北京市密云县耕地土壤养分以中低等为主,低等和极低等面积比例也相对较高,总体上看,密云县土壤养分含量水平的空间分布:是库北、库西高,库南、库西低,西南部有相当面积比例的耕地养分含量极低。与历史水平相比,耕地土壤肥力虽然有升有降,但明显以下降为主,各养分指标中只有有效磷含量呈上升趋势,其他养分均以降为主,特别是有机质下降范围和程度均较大,因此,特别需要加强在水源保护基础上的耕地土壤培肥措施,科学施肥,推广增施有机肥,遏制耕地肥力下降的趋势。
In Miyun County, Beijing, the soil nutrients in the arable land are mainly low and medium, and the proportions of low and low areas are relatively high. On the whole, the spatial distribution of soil nutrient content in Miyun County is the largest in North China, , Cousy low, there is a very large proportion of the southwest farmland nutrient content is very low. Compared with the historical level, although the soil fertility of cultivated land increased or decreased, it was obviously mainly decreased. Only available phosphorus content in all nutrient indicators showed an upward trend, and other nutrients were mainly decreased. In particular, the range and degree of decline of organic matter Therefore, it is especially necessary to strengthen soil fertility improvement measures on cultivated land based on the protection of water resources, promote the scientific application of fertilizers, and promote the application of organic fertilizers to curb the decline of cultivated land fertility.