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- W2348822749 abstract "[Objective] The research aimed to provide the foundation for scientific fertilizing.[Method] Based on the experiment of the effects of fertilizers of phosphorous and potassium from 2005 to 2012 in Xinxiang City,the index of adequacy and inadequacy of phosphorous and potassium of wheat and recommended amounts of chemical fertilizers were explored.[Result] Taking the relative output 50%,75%,95% as criterion,the indexes of adequacy and inadequacy of phosphorous and potassium were obtained,and the mathematics models of index of adequacy and inadequacy of phosphorous and potassium of wheat,namely,y = 17.513ln(x) + 31.519(R = 0.801 8) and y = 13.896ln(x) + 27.246(R = 0.805 0) were established.And the reasonable amounts of fertilizing were proposed.[Conclusion] When the effective phosphorous in soil was in extremely low,low,medium,high,extremely high rank respectively,the counter amounts of P 2 O 5 was 105-165、75 135、45-105、30-75 and 15-45 kg / hm2.When the effective potassium in soil was in extremely low,low,medium,high,extremely high rank respectively,the counter amounts of K 2 O was 120-180、90-150、60-120、30-60 and 15-30 kg / hm2." @default.
- W2348822749 created "2016-06-24" @default.
- W2348822749 creator A5070992342 @default.
- W2348822749 date "2013-01-01" @default.
- W2348822749 modified "2023-09-23" @default.
- W2348822749 title "Tentative Study of Index of Adequacy and Inadequacy of Phosphorous and Potassium of Wheat in Xinxiang City and Recommended amounts of Chemical Fertilizer" @default.
- W2348822749 hasPublicationYear "2013" @default.
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