| 不同氮肥运筹方式对水稻氮素利用率及产量的影响 |
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| 引用本文： | 陈军,叶荣榕,李程勋,朱海林,赵宏,李忠,张志兴,林文雄.不同氮肥运筹方式对水稻氮素利用率及产量的影响[J].福建农业学报,2012(7):759-763. |
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| 作者姓名： | 陈军 叶荣榕 李程勋 朱海林 赵宏 李忠 张志兴 林文雄 |
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| 作者单位： | 福建农林大学生命科学学院;福建农林大学作物科学学院 |
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| 基金项目： | 福建省自然科学基金项目(2012J01075);福建省教育厅科技计划项目(JK2011014) |
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| 摘 要： | 以水稻"甬优6号"为试验材料,在总施氮量不变的情况下,通过设置4种生育前后期不同的氮肥施用比例,考查了不同氮肥运筹比例对水稻生长、产量及氮素利用率的影响。结果显示,适当的前氮后移施肥方式(N3处理:基蘖肥∶穗粒肥=6∶4),能够有效地延缓叶绿素的降解,减少无效分蘖,提高水稻成穗率,并且N3处理下氮素积累量、水稻农学利用率以及生理利用率均达最高值,水稻产量也达最高。由此可见,适当的前氮后移能够优化水稻的群体结构,提高氮肥的利用效率,进而促进水稻高产潜力的发挥。
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| 关 键 词： | 水稻 氮肥 产量 氮素利用率 |
Effects of Nitrogen Fertilizer Management on Rice Yield and Nitrogen Utilization Efficiency |
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| CHEN Jun,YE Rong-rong,LI Cheng-xun,ZHU Hai-lin,ZHAO Hong,LI Zhong,ZHANG Zhi-xing,LIN Wen-xiong.Effects of Nitrogen Fertilizer Management on Rice Yield and Nitrogen Utilization Efficiency[J].Fujian Journal of Agricultural Sciences,2012(7):759-763. |
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| Authors: | CHEN Jun YE Rong-rong LI Cheng-xun ZHU Hai-lin ZHAO Hong LI Zhong ZHANG Zhi-xing LIN Wen-xiong |
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| Institution: | 1.College of Life Sciences,Fujian Agricultural and Forestry University,Fuzhou,Fujian 350002,China; 2.College of Crop Science,Fujian Agricultural and Forestry University,Fuzhou,Fujian 350002,China) |
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| Abstract: | Nitrogen(N) fertilizer management is one of the important factors in the rice cultural regulation,which plays a significant role in the growth of rice.Using the rice cultivar Yonyou No.6 as experimental material,four different N application proportions at the early and late growth stages were carried out to understand the effects of N fertilizer management on rice yield and N utilization efficiency.In detail,the N application rates were the same for each treatment,but the N application proportions at the early and late growth stage were 4∶6(N1),5∶5(N2),6∶4(N3) and 7∶3(N4),respectively.The results indicated that appropriate N application rates at late growth stage,for example,N3 treatment(6∶4),could effectively slow down the degradation of chlorophyll,reduce ineffective tillers and increase rice spike rate,which led to the high yield of rice.Moreover,the N accumulation,rice yield,agronomic and physiological nitrogen utilization rate in N3 treatment were more than other treatments.It′s concluded that a optimized method of N fertilizer management could play an important role in the yield formation of Yonyou No.6. |
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| Keywords: | rice nitrogen yield nitrogen utilization efficiency |
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