摘要
在不同水氮条件下,分析了冬小麦生育期归一化植被指数(Normalized difference vegetable index:NDVI)和光合速率的变化及两者和籽粒产量的关系,结果表明:(1)灌水对拔节期与孕穗期的NDVI值以及扬花期与灌浆期的光合速率有显著影响(p<0.05);起身水+孕穗水+灌浆水处理(I3)的孕穗期NDVI值和灌浆期光合速率平均比起身水处理(I1)分别显著增高6.7%和8.0%,起身水+扬花水处理(I2)的扬花期光合速率平均比起身水处理(I1)显著增高5.5%。(2)施氮对NDVI值和光合速率的影响均达到极显著水平;0～270 kg/hm2范围内,增加施氮能显著提高拔节期NDVI值以及灌浆期光合速率,但随着生育期的推进,增加施氮对NDVI值的提高作用逐渐下降。(3)拔节期NDVI值和光合速率与冬小麦籽粒产量相关性最高,相关系数分别达到0.968和0.864。
In order to study the different water and nitrogen treatments on canopy NDVI and flag leaf photosynthetic rate of winter wheat and its relationship with grain yield by designing different irrigation and nitrogen treatments.The results showed that the irrigation on NDVI of jointing and booting and flowering and the photosynthetic rate of filling stage had significant influence.Increased irrigation booting water average NDVI than only irrigation rose water was significantly increased by 6.7% at booting stage and photosynthetic rate was significantly increased by 8.0%,increased irrigation flowering water average photosynthetic rate than only irrigation rose water was significantly increased by 5.5%.Nitrogen application on NDVI and the photosynthesis rate reached extremely significant level,in the range of 0~270 kg/hm2.Increasing nitrogen application could significantly improve jointing stage NDVI and filling stage photosynthetic rate.The elongation stage of the NDVI value,the photosynthetic rate and grain yield of winter wheat were reached extremely significant correlation,the correlationship of them ware 0.968 and 0.864.
出处
《中国土壤与肥料》
CAS
CSCD
北大核心
2012年第2期27-33,共7页
Soil and Fertilizer Sciences in China
基金
国家重点基础研究发展“973”计划项目(2011CB100501)
国家“863”计划项目(2011AA100505)
国际合作项目(2010DFA34420)
关键词
冬小麦
灌水
施肥
NDVI
光合速率
winter wheat
irrigation
fertilization
NDVI
photosynthetic rate
