| 不同栽培密度对水稻产量、氮素吸收和15N-肥料去向影响 |
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| 引用本文： | 樊红柱,张鸿,冯文强,张冀,王昌桃.不同栽培密度对水稻产量、氮素吸收和15N-肥料去向影响[J].农业科学与技术,2012(5):1037-1039,1054. |
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| 作者姓名： | 樊红柱 张鸿 冯文强 张冀 王昌桃 |
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| 作者单位： | 四川省农业科学院土壤肥料研究所;四川省农业科学院科技处 |
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| 基金项目： | Supported by the Financial Breeding Fund for Young Scholars in Sichuan Province(2008QNJJ-016);Financial Fund for Excellent Gene Engineering Papers in Sichuan Province (2010LWJJ-008)~~ |
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| 摘 要： | 目的]为提高水稻产量和合理施肥提供理论依据。方法]通过田间试验利用15N示踪技术研究了不同栽培密度对水稻产量、氮素吸收、氮素来源和氮素平衡的影响。结果]在30cm×30cm和40cm×40cm栽培密度下,水稻产量和氮素吸收量无显著差异,但是它们都显著地高于50cm×50cm栽培密度下的产量和氮素吸收量。水稻氮素吸收量在112.3-162.7kg/hm2范围内变化。水稻吸收的氮素有1/3来源于当季所施肥料,2/3来源于土壤。水稻吸收、土壤残留和损失的15N-肥料分别占总施肥量的16.3%-26.1%,17.0%-20.9%和53.0%-66.7%。大量的15N-肥料在水稻生长期间损失。结论]综合考虑水稻产量和环境保护,四川丘陵区水稻合理的栽培密度为30cm×30cm。
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| 关 键 词： | 水稻产量 氮素吸收和平衡 15N-尿素 15N-去向 栽培密度 |
Effect of Transplanting Density on Rice Yield,Nitrogen Uptake and 15N-fertilizer Fate |
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| Hongzhu FAN,Hong ZHANG,Wenqiang FENG,Ji ZHANG,Changtao WANG.Effect of Transplanting Density on Rice Yield,Nitrogen Uptake and 15N-fertilizer Fate[J].Agricultural Science ＆ Technology,2012(5):1037-1039,1054. |
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| Authors: | Hongzhu FAN Hong ZHANG Wenqiang FENG Ji ZHANG Changtao WANG |
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| Institution: | 1.Institute of Soils and Fertilizers,Sichuan Academy of Agricultural Sciences,Chengdu 610066,China;2.Science and Technology Management Department,Sichuan Academy of Agricultural Sciences,Chengdu 610066,China |
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| Abstract: | Objective] The aim of this study was investigated the rice yield,nitrogen uptake and 15N-fertilizer fate at different transplanting density to provide scientific basis for improving the yield of rice and applying reasonably fertilizer.Method] A field experiment was carried out to study the effect of different transplanting density on rice yield,nitrogen(N) absorption,sources of N uptake by rice and the N balance in the plant-soil systems by using 15N-labelled urea.Result] There were no significant differences in rice yields and total N uptakes by rice between treatments 30 cm × 30 cm and 40 cm × 40 cm,but the yield of rice and total N absorption in the two treatments were remarkably higher than those in 50 cm × 50 cm treatment.The amounts of total N uptake by rice were in the range of 112.3-162.7 kg/hm2 in the three transplanting densities.The result showed that about 1/3 of the total N uptake by rice was supplied by application fertilizer and the other 2/3 was obtained from the soil N pool.The 15N-labelled urea absorbed by rice,residual in soil and lost accounted for 16.3%-26.1%,17.0%-20.9% and 53.0%-66.7% of the total fertilizer,respectively.A great deal of 15N-labelled urea was lost during the rice growing season.Conclusion] Considering the rice yield and environmental protection,the transplanting density of 30 cm×30 cm was recommended in the hilly area of Sichuan basin in the southwest China. |
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| Keywords: | Rice yield Nitrogen uptake and balance 15N-labeled urea 15N fate Transplanting density |
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