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- W3149081402 abstract "Establishing a high quality population is an important prerequisite to achieve high grain yield.Nitrogen(N) application is one of the most important practices in maize(Zea mays L.) production and plays a critical role in regulating population quality.To explore the effects of N application on accumulation and distribution of N,phosphorus(P),and potassium(K) of summer maize under the conditions of super-high yield(≥13 500 kg ha-1),we planted two maize cultivars(Suyu 20 and Xundan 20),wtih different N application levels across three years,and the highest grain yield reached to14 753 kg ha-1.The results showed that in the growth process,N,P,K accumulation increased gradually in the plants and grains of Suyu 20 and Xundan 20,and showed a curvilinear change in leaves,stems and sheatheswith a peak value at trumpeting stage and anthesis stage,respectively.The increasing of N accumulation and transfer rate in leaves at filling stage promoted the N and P accumulation of grain at mature stage,leading to super-high yield groups.In Suyu 20,yield,grain production per kg N,N agronomy efficiency,N utilization efficiency,N,P,K content in leaves,stems and sheathes were the highest at 450 kg ha-1which were 14 753 kg ha-1,44.0 kg,19.24%,38.63%,335.4 kg ha-1,178.2 kg ha-1,230.7 kg ha-1,respectively.But N,P,K accumulation and yield decreased when N application level was too high or too low.According to the regression equations between N application rate and yield of two varieties,for Xundan 20 the optimal N amount was 457.0 kg ha-1,the range of optimum N was 418.5 495.4 kg ha-1,418.3 495.7 kg ha-1 for super-high yield groups;and for Xundan 20,the optimal N was 452.7 kg ha-1,the range of optimum N was 410.8 494.6 kg ha-1" @default.
- W3149081402 created "2021-04-13" @default.
- W3149081402 creator A5005528787 @default.
- W3149081402 date "2013-01-01" @default.
- W3149081402 modified "2023-09-23" @default.
- W3149081402 title "Effects of Nitrogen Application on Accumulation and Distribution of Nitrogen, Phosphorus, and Potassium of Summer Maize under Super-high Yield Conditions" @default.
- W3149081402 hasPublicationYear "2013" @default.
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