华北农学报2013，Vol.28Issue(1)：213-220,8.
氮密互作对陆两优996冠层特性和产量的影响
Effects of Transplanting Density and Nitrogen Fertilizer Rate on Canopy Characteristics and Yield of Luliangyou 996
摘要
Abstract
The effect of different nitrogen fertilizer rates (N 0,90,135,180 kg/ha) and transplanting densities (2. 2× 105,3. 0 ×105,4. 5 × 105 hills/ha)on canopy physiological and ecological characteristics and yield of early rice was studied by using super hybrid rice Luliangyou 996. The results showed that medium transplanting densities and medium N use rate had a significant reduction of rice canopy temperature in hot season and canopy relative humidity increased, good micro climatic conditions was created, there by significantly enhanced photosynthetic rate and SPAD value and solar radiation interception rate of canopy,the N135D30 could get the maximum yield,it was 10 489.30 kg/ha. Nitrogen fertilizer rate and transplanting density had little effect on grain number per panicle, seed-setting rate but the productive panicles and 1000-grain weight were decreased. The effect of interaction of nitrogen fertilizer and transplanting density on grain number per panicle was significant. As a result, high yield of the early rice can be obtained by the N fertilization rate was used as 141.2 kg/ha with the transplanting density of 3. 66 × 105 hills/ha.关键词
氮肥/密度/微气象环境/生理生态特性Key words
Nitrogen fertilizer/ Density/ Micro climatic conditions/ Physiological and ecological characteristics分类
农业科技引用本文复制引用
刘文祥,青先国,艾治勇,朱佳文..氮密互作对陆两优996冠层特性和产量的影响[J].华北农学报,2013,28(1):213-220,8.基金项目
国家粮食丰产科技工程"长江中游南部(湖南)双季稻持续丰产高效技术集成创新与示范"(2011BAD16B01) （湖南）
湖南省农业科学院创新基金项目(2009hnnkycx24) （2009hnnkycx24）
