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老挝中部不同利用方式土壤养分状况分析
作者: 刘 忠1  唐其展1 *  陈桂芬1  SENGXUA Pheng 2  DUANPHADY Khonepany2  蒙炎成1  苏利荣1  
单位: (1 广西农业科学院  南宁 530007;2 老挝国家农林研究所  万象)  
关键词: 老挝中部  土壤养分  土地利用方式  水田  荒地  旱地  
分类号:S158
出版年,卷(期):页码:2012 ,43 ( 12 ): 页码:1981-1985
摘要:

【Objective】The purpose of this study was to understand the soil nutrient situation under different types of land use in Central Laos to provide references for the rational fertilization and to promote crop yield and soil sustainable productivity in agricultural production. 【Method】Soil samples were respectively collected from paddy field, dry land, and waste land in Central Laos, and the corresponding pH value, organic matter, macronutrients and micronutrients content, and medium nutrients were analyzed. 【Result】The result showed that the organic matter content in soil under the three types of land-use followed the ordered sequence of dry land > paddy land > waste land; for pH value, on the other hand, the reverse ordered sequence applied. The contents of available N, P, K and total N, P, K in waste land measured the highest. Also, the contents of micronutrients, including available Cu and Fe, in paddy field were the highest, while the contents of micronutrients, including available Zn, Mn, and B, as well as the medium nutrients, including exchangeable Ca and Mg, in dry land were the highest amongst the three different land use types. 【Conclusion】The soil in Central Laos is acidic with low fertility, and the soil nutrients situation under different types of land use is different.

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