干旱胁迫对冬小麦生态、光合、产量及光谱特征的影响  

Influence of Drought Stress on Ecological,Photosynthetic,Yield and Reflectivity Characteristics in Winter Wheat

作　　者：崔维佳[1] 常志云[1,2] 李宁[1] 

机构地区：[1]北京师范大学民政部/教育部减灾与应急管理研究院,北京100875 [2]北京师范大学地表过程与资源生态国家重点实验室,北京100875

出　　处：《山西农业科学》2013年第12期1314-1318,1346,共6页Journal of Shanxi Agricultural Sciences

基　　金：国家重大科学研究计划项目(2012CB955402);科技部国际科技合作项目(S2012GR0231)

摘　　要：利用2010—2011年度小区冬小麦干旱试验资料,研究不同干旱时长和保持不同土壤水分条件下冬小麦生理生态以及光谱的变化特征,为改善冬小麦田间管理和减少农业损失提供依据。从孕穗期开始,研究了受试品种(中优9507)株高、叶绿素、净光合速率、产量及光谱特征等指标的变化规律,并据此构建出冬小麦归一化植被指数(NDVI)和增强植被指数(EVI)同冬小麦减产率的相关模型。结果表明,受干旱胁迫后,冬小麦株高、叶绿素含量、光合作用能力显著下降,且下降幅度随着胁迫的加强而增大。NDVI和EVI同减产率能够建立很好的关系模型,可以为作物产量监测和干旱风险预测提供依据。Using winter wheat dry farming data from 2010 to 2011, the physiological, ecological indexes and the reflectivity of winter wheat which is under different drought duration and different soil drought stress were studied to improve the winter wheat field management and relief farming loss. Since booting stage, the variations of winter wheat Zhongyou 9507 leaf chlorophyll, plant height, photosynthetic rate, yield and reflectivity are studied through control of drought duration and varying degrees of soil moisture treatments and established the model between the production rate and the canopy reflectance. The results showed that all the indexes measured from plant height, chlorophyll content, photosynthetic capacity and wheat production are decreased significantly when subjected to water stress, and it became more serious with the strengthening of stress. We had established the relationship between normalized difference vegetation index （ NDVI ）, enhanced vegetation index （EVI） and winter wheat production rate. It could provide the basis for monitoring crop yields and drought risk prediction.

关 键 词：干旱胁迫 冬小麦 生理生态特征 光谱特征 

分 类 号：S512.11[农业科学—作物学]