藏东南大型国营农场土壤肥力现状及培肥措施

藏东南大型国营农场———米林农场土壤养分含量明显下降 ,有机质、碱解氮、有效磷、有效钾分别较 1992年降低49 4% ;49.3 % ;47.8% ;72 .5 %。下降的主要原因是施肥水平低 ,化肥利用率不高 ,种植结构单一。因此 ,大量施用有机肥 ,合理施用化肥 ,调整种植结构 ,扩种绿肥是培肥该农场土壤的主要措施

Status of Soil Fertility and Fertility-building Measures in the Large-scale State-run Farm of Southeastern Tibet

This view shows: the nutrient contents in the soil of the large-scale state-run farm in southeastern Tibet-Milin farm was decreased.The curent levels of organic matter and available N, P, K were declined by 49.4%,49 3%,47.8%,72.5% respectively compared with those in 1992.The main causes were low levels of applying fertilizer, low utilization efficiency of chemical fertilizer and single plant structure. Thus, to improve soil fertility in this farm, the main measures should be the application of efficient organic manure and chemical fertilizer, adjusting plant structure and planting green manure.