贡嘎县耕地土壤养分状况及对策分析(英文)

Study on Status quo of Nutrients in Soils of Farmlands in Gonggar County and Related Countermeasures

[目的]分析西藏贡嘎县耕地土壤养分状况分布情况及其比例。[方法]根据西藏首次土壤资源调查结果,对西藏贡嘎县耕地土壤养分状况进行分析,并提出实现耕地土壤养分可持续利用的对策。[结果]西藏贡嘎县耕地土壤有机质含量缺乏和较缺乏的耕地占总量的58.38%;土壤全氮含量中等的耕地占总量的47.71%,土壤碱解氮含量缺乏和较缺乏的耕地占总量的82.36%;土壤全磷含量中等和较丰富的耕地分别占总量的 49.40%和 21.59%,土壤速效磷含量缺乏和较缺乏的耕地占总量的67.33%;土壤全量钾含量丰富和较丰富的耕地共占耕地总量的 76.14%,土壤速效钾含量中等和较缺乏的耕地占耕地总量的72.21%。[结论]根据该地区耕地土壤养分状况,提出实现该地区耕地土壤养分可持续利用的对策为:增施有机肥料;实施测土配方施肥技术;调节土壤酸碱平衡。

[Objective] The aim was to analyze nutrients distribution and proportion in soils of farmlands of Gonggar County in Tibet. [Method] According to survey of soils in Tibet, nutrients of farmlands in Gonggar County were analyzed and the countermeasures were proposed to achieve sustainable development of nutrients in soils. [Result] In Gonggar County in Tibet, farmlands with insufficient and less organic matter occupy 58.38%; farmlands with moderate contents of total N occupy 47.71%; farmlands with insufficient and less alkali-hydrolyzable nitrogen represent 82.36%; the farmlands with moderate and rich total P take up 49.40% and 21.59% ; farmlands with insufficient and less rapidly available P represent 67.33%; farmlands with richer and rich total K occupy 76.14% ; farmlands with moderate and insufficient rapidly available K represent 72.21%. [Conclusion] Based on nutrients in soils of farmlands, the countermeasures for sustainable utilization of nutrients in farmlands are proposed, including increase of organic fertilizer, soil testing and formulated fertilization and adjustment of acid-base balance.