【摘要】 在对广东省多个市县2007～2008年开展的水稻"3414"田间肥效试验结果进行统计分析的基础上,研究了广东省水稻测土配方施肥指标体系中的磷、钾养分丰缺指标,建立的水稻土有效磷丰缺指标的数学模型为y=7.2212Ln(x)+59.705、r=0.671,有效钾丰缺指标的数学模型为y=9.3529Ln(x)+46.928、r=0.486,有效磷含量与推荐施磷量的数学模型为:y=-0.023x+4.463、r=-0.716,有效钾含量与推荐施钾量的数学模型为y=-4.1001Ln(x)+24.834、r=-0.817;提出了土壤有效磷和有效钾的极低、低、中、中高、高5个等级指标及不同肥力水平水稻土的磷、钾肥推荐施用量。更多还原

【Abstract】 This paper studied the effects of different fertilizer models on simulation for the ‘3414’ fertilizer experiments,which were conducted from 2007 to 2008 in 30 cities in Guangdong Province.With analysing the data,the index system of soil available nutrient(phosphorus and potassium) abundance on Guangdong paddy rice were established.The results indicated that,the regression equation index for soil available phosphorus content is y=7.2212Ln(x)+59.705(the correlation coefficients was 0.671);the regression equation index for soil available potassium content is y=9.3529Ln(x)+46.928(the correlation coefficients was 0.486);the regression equation of the recommended phosphorus content is y=-0.023x+4.463(the correlation coefficients was-0.716).The regression equation of the recommended potassium content is y=-4.1001Ln(x)+24.834(the correlation coefficients was-0.817).According to equations,the index system of soil available nutrient(phosphorus and potassium) abundance can be divided into high,between high and medium,medium,low and extreme low five-level.And the recommended fertilizer of different nutrient levels of the paddy rice soil was put forward.更多还原