• ISSN 1008-505X
  • CN 11-3996/S
王秀斌, 徐新朋, 孙刚, 孙静文, 梁国庆, 刘光荣, 周卫. 氮肥用量对双季稻产量和氮肥利用率的影响[J]. 植物营养与肥料学报, 2013, 19(6): 1279-1286. DOI: 10.11674/zwyf.2013.0601
引用本文: 王秀斌, 徐新朋, 孙刚, 孙静文, 梁国庆, 刘光荣, 周卫. 氮肥用量对双季稻产量和氮肥利用率的影响[J]. 植物营养与肥料学报, 2013, 19(6): 1279-1286. DOI: 10.11674/zwyf.2013.0601
WANG Xiu-bin, XU Xin-peng, SUN Gang, SUN Jing-wen, LIANG Guo-qing, LIU Guang-rong, ZHOU Wei. Effects of nitrogen fertilization on grain yield and nitrogen use efficiency of double cropping rice[J]. Journal of Plant Nutrition and Fertilizers, 2013, 19(6): 1279-1286. DOI: 10.11674/zwyf.2013.0601
Citation: WANG Xiu-bin, XU Xin-peng, SUN Gang, SUN Jing-wen, LIANG Guo-qing, LIU Guang-rong, ZHOU Wei. Effects of nitrogen fertilization on grain yield and nitrogen use efficiency of double cropping rice[J]. Journal of Plant Nutrition and Fertilizers, 2013, 19(6): 1279-1286. DOI: 10.11674/zwyf.2013.0601

氮肥用量对双季稻产量和氮肥利用率的影响

Effects of nitrogen fertilization on grain yield and nitrogen use efficiency of double cropping rice

  • 摘要: 试验采用田间小区试验,设置7个氮肥用量(N 0、 60、 120、 180、 240、 300和360 kg/hm2),研究了江西省高产田、 中产田和低产田双季稻最佳施氮量,以及不同施氮水平对水稻产量、 氮肥贡献率、 土壤氮素依存率和氮肥利用率的影响。结果表明,低产田、 中产田和高产田分别在施氮量为120、 180和240 kg/hm2处理取得高产; 氮肥贡献率在低产田和中产田上大于高产田,且分别在施氮处理为N 120、 180和240 kg/hm2达到最大;土壤氮素依存率为高产田中产田低产田,且在一定范围内随着施氮量的增加,土壤氮素依存率逐渐降低; 氮肥吸收利用率为低产田中产田高产田,氮肥农学效率、 氮肥生理利用率和氮肥偏生产力低、 中、 高产田间差异不大。高、 中、 低产田氮肥农学利用率、 氮肥吸收利用率和氮肥偏生产力随氮肥用量增加而降低,而氮肥生理利用率各施氮处理间变化不大。综合产量和氮肥利用率得出,低产田、 中产田和高产田双季稻适宜施氮量分别为N 120、 180和240 kg/hm2。

     

    Abstract: Field trials with seven treatments of N application rates(N 0, 60, 120, 180, 240, 300 and 360 kg/ha) were set up to determine the optimum N application rate, and to identify the responses of N fertilization contribution rate, soil N dependent rate and N use efficiency to different N application rates in paddy fields with different yield levels(high, middle and low). The results show that the low-, middle-, and high- yield paddy fields have the highest grain yields under the application rates of N 120, 180 and 240 kg/ha, respectively. The nitrogen fertilization contribution rates(NCR) in the low- and middle- yield fields are larger than that in the high-yield field, and the highest NCRs are acquired in the treatments of N 120, 180 and 240 kg/ha for the three fields separately. Soil nitrogen dependent rates(SNPR) are in the order: high-yield field middle-yield field low-yield field, and the SNPR is decreased with the increase of N application rates to some extent. The trend of nitrogen recovery efficiency(NRE) is low-yield field middle-yield field high-yield field, whereas no distinct differences exist for nitrogen agronomic efficiency(NAE), nitrogen physiological efficiency(NPE) and nitrogen partial factor productivity(PFPN) among high, middle-, and low-yield paddy fields. All NAE, NRE and PFPN in high-, middle-, and low-yield paddy fields are decreased with the increase of N application rates, while NPE remains relatively stable among different fertilization treatments. The optimum N application rates for double cropping rice in low-, middle- and high- yield fields are N 120, 180 and 240 kg/ha, respectively.

     

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