西藏“一江两河”地区耕地土壤养分状况及可持续利用分析

[Objective] The study aimed to sum the distribution and proportion for the soil nutrient of the cultivated soil in Tibet ”One River and Two Streams” area. [Method] The soil nutrient status of the cultivated soil in Tibet ”One River and Two Streams” area was analyzed according to the results of first survey of soil resources in Tibet, and the countermeasures of realizing the sustainable utilization for the soil nutrient of cultivated land were put forward. [Result] The cultivated land that lack and more lack the soil organic matter content accounted for 53.62% of total in Tibet ”One River and Two Streams” area. The cultivated land that lack and more lack the soil total nitrogen content accounted for 39.3% of the total. The cultivated land that lack and more lack the alkali solution nitrogen accounted for 46.55% of the total. The cultivated land that lack and more lack the soil total phosphorus content resp. accounted for 2.88% and 21.10% of the total. The cultivated land that lack and more lack the soil organic phosphorus content accounted for 70.58% of the total. The cultivated land that lack and more lack the soil total potassium content accounted for only 4.34% of the total. [Conclusion] According to the nutrient status of the cultivated land in this area, the countermeasures of realizing the sustainable utilization for the soil nutrient of cultivated land were put forward as follows: increasing the organic fertilizer; carrying out the soil testing and fertilization technology; adjusting the soil acid and alkali balance.