| 免耕条件下川香优9838氮磷钾吸收规律与氮肥合理施用(英文) |
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| 作者单位： | 四川省农业科学院土壤肥料研究所 四川成都610066(孙锡发，涂仕华，秦鱼生，冯文强，廖鸣兰)，成华区城乡一体化工作局 四川成都610051(周先龙) |
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| 摘 要： | The aim of the study is to investigate the absorption laws of nitrogen,phosphorus,and potassium,and proper nitrogen application in Chuanxiangyou 9838 under no-tillage cultivation. Five nitrogen application treatments were designed to analyze the absorption laws of N,P and K,and to discuss the effects of different N fertilizer application amounts on yield and yield composition factors of Chuanxiangyou 9838. The results showed that gross nutrient absorption in Chuanxiangyou 9838 was greatly varied at different developmental stages under rice-rape rotation with no-tillage. The maximum N absorption in Chuanxiangyou 9838 appeared at jointing stage followed by heading stage,thirdly the tillering stage; the P absorption in Chuanxiangyou 9838 presented the consecutively slight increase during seedling stage and mature stage; the K absorption in Chuanxiangyou 9838 was mainly conducted from jointing stage to heading stage,during which K absorption accounts for 73.4% of the total absorption in whole developmental stage. Consequently,N fertilizer should be applied earlier (before jointing stage),P fertilizer is suitable as base fertilizer and application of K fertilizer should be preferably conducted at early-middle period. When the yield reached 11 t/hm2,the optimal N application amount in Chuanxiangyou 9838 was about 165 kg/hm2.
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Study on Absorption Law of Nitrogen,Phosphorus and Potassium and Proper Nitrogen Application in Chuanxiangyou 9838 under No-tillage Cultivation |
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| Abstract: | The aim of the study is to investigate the absorption laws of nitrogen,phosphorus,and potassium,and proper nitrogen application in Chuanxiangyou 9838 under no-tillage cultivation. Five nitrogen application treatments were designed to analyze the absorption laws of N,P and K,and to discuss the effects of different N fertilizer application amounts on yield and yield composition factors of Chuanxiangyou 9838. The results showed that gross nutrient absorption in Chuanxiangyou 9838 was greatly varied at different developmental stages under rice-rape rotation with no-tillage. The maximum N absorption in Chuanxiangyou 9838 appeared at jointing stage followed by heading stage,thirdly the tillering stage; the P absorption in Chuanxiangyou 9838 presented the consecutively slight increase during seedling stage and mature stage; the K absorption in Chuanxiangyou 9838 was mainly conducted from jointing stage to heading stage,during which K absorption accounts for 73.4% of the total absorption in whole developmental stage. Consequently,N fertilizer should be applied earlier (before jointing stage),P fertilizer is suitable as base fertilizer and application of K fertilizer should be preferably conducted at early-middle period. When the yield reached 11 t/hm2,the optimal N application amount in Chuanxiangyou 9838 was about 165 kg/hm2. |
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| Keywords: | Chuanxiangyou 9838 Nitrogen Phosphorus Potassium Application amount |
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