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《Guizhou Agricultural Sciences》 2005-S1
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Change of Soil Nutrient Content and the Fertilization in Guizhou

CHEN Xu-hui(Soil and Fertilizer Institute,Guizhou Academy of Agricultural Sciences,Guiyang 550006,China)  
In order to find out the change of soil nutrient content in farmlands of Guizhou,a survey of soil and fertilizer was conducted again in 1998~1999,based on the survey results of 1985.Results showed that the contents of soil organic matter,nitrogen and phosphorus in paddy fields increased year by year,under the application of chemical fertilizer combined with organic manure,even if the chemical fertilizer played a leading role in the supply of nutrient.In upland fields,the soil phosphorus content was also increased,whereas soil organic matter and potassium were obviously reduced.The contents of soil microelements-available boron,zinc and molybdenum generally increased in upland and paddy fields.Hence it is necessary to increase the application of potash fertilizer and to pay attention to the use of organic manure,the return of straw to farmland and the control of soil and water losses in order to improve soil fertility and to promote the development of sustainable agriculture.
【CateGory Index】: S158;
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