Study on the Relationships between Utilization Ratios and Conversion Rates of Nitrogen,Phosphorus and Potassium for Wheat

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

摘要：This paper studied the relationships between utilization ratios and conversion rates of nitrogen,phosphorus and potassium for wheat by data mining method based on data of"3414 fertilizer field trials"of wheat by published papers from national soil testing and recommendation since 2005.The results and conclusions were as follows:①the conceptual model of fertilizer utilization ratio of wheat for plot was that,Y N≈a+b×optimum nitrogen application amount+c×optimum fertilizer amount of K+d×rainfall in growth season,Y P≈a+b×optimum fertilizer amount of K+c×rainfall in growth season,Y K≈a+b×temperature in growth season+c×rainfall in growth season-d×optimum yield-e×optimum nitrogen application amount,respectively.②Fertilizer utilization ratio and nutrient conversion rate had 4 kinds of relationships.No significant relationships:13,of which 8 were soil nutrients,the results showed that soil nutrients had little effect on nutrient conversion rate and fertilizer utilization ratio;consistent significant relationships:4,they were all nitrogen and phosphorus,explaining the importance of nitrogen and phosphorus;contrary significant relationships:6,they were all nitrogen and phosphorus,illustrating that phosphorus and nitrogen had inhibitory effect;complementary significant relationships:31,the cause of the complementary phenomenon was that the fertilizer utilization ratio was the measuring index of fertilizer efficiency in one season,while the nutrient conversion rate was the measuring index of fertilizer efficiency in more seasons.It showed that the fertilizer utilization rate was significantly correlated,or the nutrient conversion rate was significantly correlated.

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： S51[農業科學—作物學]