植物营养与肥料学报2016，Vol.22Issue(6)：1503-1512,10.
根部增氧模式对水稻产量与氮素利用的影响
Effect of root aeration methods on rice yield and nitrogen utilization
摘要
Abstract
[Objectives]Rhizosphere anoxia is one of the main abiotic factors that affect the rice growth and nutrient absorption. In order to define consequence of different root aeration methods and their response characteristics on rice yield and nitrogen utilization, an experiment was conducted to study rice growth dynamic, yield and nitrogen utilization status under different root aeration methods.[Methods]Two rice cultivars, IR45765-3B(deep water rice) and Zhongzheyou No. 1 (ZZY-1, rice), were used as materials. Rice was planted in cement pools with overlay on the proof to avoid rainfall, and there were four treatments, calcium peroxide (CaO2), micro-nano bubble water irrigation (MBWI), alternate wetting and drying (AWD) and control (waterlogging, WL). The effects of rhizosphere aeration methods on rice growth, yield and nitrogen utilization were examined .[Results]Compared with the water logging (WL) control, the three root aeration treatments significantly increased the tillering of IR45765-3B by 10.7%–33.6%, and in case of ZZY-1 the tiller number was increased significantly under the CaO2 and AWD treatments in some growth periods recorded. The rhizosphere aeration significantly increased the dry matter accumulation and yield, and compared with the WL control, the yields of IR45765-3B were increased by 26.3% (CaO2), 21.8% (MBWI) and 10.7% (AWD) and the yields of ZZY-1 were increased by 51.0% (CaO2), 52.2% (MBWI) and 29.68% (AWD), respectively. The root aeration significantly enhanced the nitrogen accumulation and utilization, and compared with the WL, the nitrogen partial factor productivity (NPFP) of IR45765-3B and ZZY-1 was increased significantly under the three aeration treatments. The nitrogen transportation efficiencies (NTE) and the nitrogen transportation contribution rates (NTCR) were decreased under the CaO2 and MBWI treatments, while the nitrogen accumulation amounts of IR45765-3B and ZZY-1 after the full heading stage under the CaO2 treatment were increased by 73.4% and 119.2%, and the amounts under the MBWI treatment were increased by 128.7% and 106.5%, respectively.[Conclusions]The root aeration significantly enhanced tiller development and ear formation progress of rice, and the dry matter accumulation and yield were increased significantly. The root aeration significantly enhanced the nitrogen accumulation and nitrogen use efficiency. Comprehensively, the CaO2 application and micro-nano bubble water irrigation are more effective than the alternate wetting and drying method.关键词
水稻/施用CaO2/微纳气泡水增氧灌溉/干湿交替灌溉/产量/氮素利用Key words
rice/CaO2 application/micro-nano bubble water irrigation/alternate wetting and drying irrigation/yield/N efficiency分类
农业科技引用本文复制引用
胡志华,朱练峰,林育炯,张均华,胡继杰,禹盛苗,曹小闯,金千瑜..根部增氧模式对水稻产量与氮素利用的影响[J].植物营养与肥料学报,2016,22(6):1503-1512,10.基金项目
国家自然科学基金资助项目（30900880,31270035）；公益性行业（农业）科研专项（201503122-11）；浙江省自然科学基金资助项目（LY13C130006）资助。 （）
