摘要
为了揭示控释氮肥对节水灌溉水稻产量及水肥利用效率的影响,开展了稻田不同水氮管理田间试验,分析了水氮调控条件下水稻产量、灌水量、耗水量、植株吸氮量及水肥利用效率的变化规律。结果表明:与常规灌溉相比,节水灌溉在保证稳产的同时,减少稻田灌水量和耗水量55.32%和33.71%,植株对氮素的吸收增加3.13%,水肥利用效率分别提高47.23%和7.54%。控释氮肥管理降低了植株吸氮量,但氮肥利用效率显著提高37.65%。节水灌溉与控释氮肥的联合应用在显著减少水分和氮素投入的同时,水稻产量减少不显著,吸氮量大幅增加,水稻水肥利用效率较常规水肥处理显著提高45.31%和47.73%。
In order to reveal the effects of controlled release fertilizer on rice yield, water and nitrogen use efficiency under water-saving irrigation, based on filed experiments, this paper analyzed the variation of rice yield, irrigation requirement, water consumption, water and nitrogen use efficiency under water and fertilizer coupling. The results showed that compared with traditional irrigation, water-saving irrigation made the irrigation requirement and water consumption decrease by 55. 32% and 33. 71 %, respectively, the nitrogen uptake increase by 3.13%, water and nitrogen use efficiency increase by 47.23% and 7. 54%, respectively. Controlled release fertilizer management reduced the nitrogen uptake and made the nitrogen use efficiency increase by 37.65%. The water and fertilizer coupling management reduced the input of water and nitrogen markedly, while the rice yield did not drop and the nitrogen uptake increased substantially. Compared with traditional water and fertilizer management, water-saving irrigation and controlled release fertilizer management made the water and nitrogen use efficiency increase by 45.31 % and 47. 73%, respectively.
出处
《节水灌溉》
北大核心
2014年第5期7-10,共4页
Water Saving Irrigation
基金
博士点基金(20110094110015)
博士后基金特别资助项目(2013T60495)
江苏省高校优秀科技创新团队
关键词
水稻
控制灌溉
控释氮肥
水肥利用效率
rice
controlled irrigation
controlled release fertilizer
water and nitrogen use efficiency
