西藏“一江两河”地区耕地土壤养分状况及可持续利用分析  

Study on Nutrient Status and Sustainable Utilization of Cultivated Soil in Tibet "One River and Two Streams" Area

作　　者：郭健斌[1] 张红锋[1] 刘翠花[1] 曹丽花[1] 刘合满[1] 

机构地区：[1]西藏农牧学院,西藏林芝860000

出　　处：《安徽农业科学》2011年第26期16041-16042,16090,共3页Journal of Anhui Agricultural Sciences

基　　金：西藏自治区科技厅项目"西藏耕地土壤养分空间变异与肥力综合评价"[藏科发(2009)162号]

摘　　要：[目的]分析西藏"一江两河"地区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"一江两河"地区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"一江两河"地区耕地土壤有机质含量缺乏和较缺乏的耕地占总量的53.62%;土壤全氮含量缺乏和较缺乏的耕地占总量的39.43%;土壤缺乏碱解氮的耕地占总量的46.55%;土壤全磷含量缺乏和较缺乏的耕地分别占总量的2.88%和21.10%,土壤速效磷含量缺乏和较缺乏的耕地占总量的70.58%;土壤全量钾含量缺乏和较缺乏的耕地仅占耕地总量的4.34%。[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 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 39.43% 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.

关 键 词：耕地土壤 养分状况 西藏 

分 类 号：F323.211[经济管理—产业经济]