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北京市怀柔区土壤养分2009年总体评价为中等水平,养分评分为55分,但土壤养分含量的空间、地区间分布极不平均,各乡镇土壤肥力评分按地形位置排序:1(山区)﹥2(两沟)﹥3(平原),全区土壤肥力从北到南,从西到东呈递减趋势;与历史水平相比,有机质、全氮、碱解氮含量程上升趋势,速效磷程下降趋势,速效钾程上升趋势。
The soil nutrients in Huairou District of Beijing were generally moderately evaluated in 2009 with a nutrient score of 55. However, the spatial distribution of soil nutrient content was extremely uneven. The soil fertility ratings of each township were ranked according to the topography: 1 (mountain area)> 2 (Two furrows)> 3 (plain). The soil fertility of the whole region decreased from north to south and decreased from west to east. Compared with the historical level, the content of organic matter, total nitrogen and available nitrogen increased, while the available phosphorus decreased Trend, available potassium upward trend.