Summary on the Index System of Ecological Balanced Fertilization for Maize

作者：Hongyan ZHENG,Shutian LIU,Xianda HOU,Shuojin WANG,Zhiping HUANG,Jian DING,Changhong MI,Ling LU,Yanlin HOU

摘要：This paper studied the index system of ecological balanced fertilization for maize by data mining method based on data of"3414 fertilizer field trials"of maize by published papers from national soil testing and recommendation since 2005.The results and conclusions were as follows:①the optimum N,P and K fertilization amounts of maize were within the normal range,and the application of this standard could not cause obvious non-point source pollution.②The conversion rates of N,P and K of maize were respectively higher than their respective utilization ratios under the optimum fertilization amount.③At present,the soil N for maize was in an absence state,and soil P and K were in a state of not obvious lack.④Optimum N,P and K fertilization amounts were significantly negatively correlated with their respective conversion ratios,respectively,and it provided a quantitative scientific basis for calculating the optimum fertilization amount according to the nutrient conversion rate.Each province can use this significant relationship to guide the determination of the average optimal fertilization amounts of N,P and K and the optimal production in the province.⑤The research results of nutrient conversion rate showed that any excessive application of N,P and K would reduce their own nutrient conversion rates,and may also reduce the conversion rates of other nutrients.The characteristics of crops absorbing N,P and K proportionally required that soil nutrients must be balanced in order to obtain high production,and fertilization was only the main means to regulate soil nutrient balance.

發文機構：Agro-Environmental Protection Institute Guangxi Geographical Indication Crops Research Center of Big Data Mining and Experimental Engineering Technology Guangxi Key Laboratory of Earth Surface Processes and Intelligent Simulation Key Laboratory of Environment Change and Resources Use in Beibu Gulf（Nanning Normal University）

關鍵詞：OptimumyieldOptimumfertilizationamountNutrientconversionrateFertilizerutilizationratioRelativeabundance-deficiencyvalueofsoilnutrient

分類號： F42[經濟管理—產業經濟]