| 氮肥用量对双季稻产量和氮肥利用率的影响 |
| |
| 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. |
| |
| 作者姓名： | 王秀斌 徐新朋 孙刚 孙静文 梁国庆 刘光荣 周卫 |
| |
| 作者单位： | 1.中国农业科学院农业资源与农业区划研究所,农业部植物营养与肥料重点实验室,北京 100081; |
| |
| 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。
|
| 关 键 词： | 高、中、低产田 双季稻 产量 氮肥施用量 氮肥利用率 |
| 收稿时间： | 2013-02-28 |
Effects of nitrogen fertilization on grain yield and nitrogen use efficiency of double cropping rice |
| |
| 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].Plant Nutrition and Fertilizer Science,2013,19(6):1279-1286. |
| |
| Authors: | WANG Xiu-bin XU Xin-peng SUN Gang SUN Jing-wen LIANG Guo-qing LIU Guang-rong ZHOU Wei |
| |
| Institution: | 1.Institute of Agricultural Resource and Regional Planning,CAAS/Key Lab of Plant Nutrition and Fertilizer Research,MOA,Beijing 100081,China; |
| |
| 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. |
| |
| Keywords: | |
|
| 点击此处可从《植物营养与肥料学报》浏览原始摘要信息 |
| 点击此处可从《植物营养与肥料学报》下载免费的PDF全文 |
|
