| Effects of Site-Specific Nitrogen Management on Yield and Dry Matter Accumulation of Rice from Cold Areas of Northeastern China |
| |
| 作者姓名： | PENG Xian-long LIU Yuan-ying LUO Sheng-guo FAN Li-chun SONG Tian-xing GUO Yan-wen |
| |
| 作者单位： | [1]Resoltrce and Environment College, Northeast Agricultural University, Harbin 150030, P.R.China [2]Heping Irrigation Station, Qing＇an 152000, P.R.China |
| |
| 基金项目： | 国家自然科学基金;引进国际先进农业科技计划(948计划) |
| |
| 摘 要： | The effects of yield increase and mechanism of site-specific nitrogen management （SSNM） in five rice varieties from cold areas of northeastern China were studied. Plot experiment for critical SPAD value and experiments of two fertilization methods, SSNM and farmer＇s fertilization practice （FFP） were conducted to study their effects on the quality and dry matter accumulation of rice population, as well as N uptake. Compared with FFP, SSNM significantly decreased the average N rate by 33.8%, significantly increased average ear-bearing tiller rate and LAI for grain-filling stage by 12.3% and 14.1-27.6%, correspondingly, improved dry matter weight and N uptake after heading period by 4.3-29.1% and 11.8-55.1% （P 〈 0.05）, and heightened recovery efficiency and agronomic efficiency by 38.5-133.4% （P 〈 0.05） and 39.8-194.3% （P 〈 0.05）, respectively, as well as increased the average yield by 9.8% in 2004 and 2005. The results indicated that the accumulation rate of dry matter and N increased the rice yield and N use efficiency, because of improving rice population quality and increasing LAI after heading period.
|
| 关 键 词： | 中国东北 寒冷地区 实地氮肥管理 水稻 产量 干物质积累 |
Effects of Site-Specific Nitrogen Management on Yield and Dry Matter Accumulation of Rice from Cold Areas of Northeastern China |
| |
| PENG Xian-long LIU Yuan-ying LUO Sheng-guo FAN Li-chun SONG Tian-xing GUO Yan-wen.Effects of Site-Specific Nitrogen Management on Yield and Dry Matter Accumulation of Rice from Cold Areas of Northeastern China[J].Agricultural Sciences in China,2007,6(6):715-723. |
| |
| Authors: | PENG Xian-long LIU Yuan-ying LUO Sheng-guo FAN Li-chun SONG Tian-xing GUO Yan-wen |
| |
| Institution: | 1. Resource and Environment College, Northeast Agricultural University, Harbin 150030, P.R.China
2. Heping Irrigation Station, Qing'an 152000, P.R.China |
| |
| Abstract: | The effects of yield increase and mechanism of site-specific nitrogen management (SSNM) in five rice varieties from cold areas of northeastern China were studied. Plot experiment for critical SPAD value and experiments of two fertilization methods, SSNM and farmer's fertilization practice (FFP) were conducted to study their effects on the quality and dry matter accumulation of rice population, as well as N uptake. Compared with FFP, SSNM significantly decreased the average N rate by 33.8%, significantly increased average ear-bearing tiller rate and LAI for grain-filling stage by 12.3% and 14.1-27.6%, correspondingly, improved dry matter weight and N uptake after heading period by 4.3-29.1% and 11.8-55.1% (P＜0.05), and heightened recovery efficiency and agronomic efficiency by 38.5-133.4% (P＜0.05) and 39.8-194.3% (P＜0.05), respectively, as well as increased the average yield by 9.8% in 2004 and 2005. The results indicated that the accumulation rate of dry matter and N increased the rice yield and N use efficiency, because of improving rice population quality and increasing LAI after heading period. |
| |
| Keywords: | cold areas rice site-specific nitrogen management yield dry matter N use efficiency |
| 本文献已被 维普 万方数据 ScienceDirect 等数据库收录！ |
