旱地冬小麦冠层温度和其产量以及产量构成因素之间的关系  

The relationship between canopy temperature and yield and yield components of Winter wheat

作　　者：徐银萍[1] 辛平 宋尚有[1] 樊廷录[1] 

机构地区：[1]甘肃省农业科学院,甘肃兰州730070 [2]甘肃省林业科学技术推广总站,甘肃兰州730046

出　　处：《农业科技通讯》2010年第7期38-41,共4页

基　　金：黄土高原土壤侵蚀与旱地农业国家重点实验室基金资助项目(10501-162);"十一"国家科技支撑计划"西北半湿润偏旱区粮果稳产高效技术集成与示范"课题资助项目(2006BAD29B07)

摘　　要：对旱地小麦冠层温度和产量及产量构成因素的关系分析可知：冠层温度（CT）和产量之间的相关性均呈现出增强—减弱—增强的变化趋势,判定系数R2的最大值出现在5月22日（R2=0.710）。8个监测日冠层温度和产量之间有极显著的负相关,随着CT的降低,产量提高,冠层温度偏低的品种其产量高,而冠层温度偏高的品种其产量低。参试品种（系）中,冠层温度偏低型的定鉴3号和冠层温度偏高型的沧核038冠层温度差达到4~5℃,产量之间相差2.1t/hm2。冠层温度和产量构成因素当中,冠层温度和千粒重、小穗数都呈现出负相关。冠层温度和产量及产量构成因素之间的相关性由强到弱依次为：产量,千粒重,小穗数,穗粒数。Through analysis the relationship between Canopy temperature and yield and yield compo- nents of winter wheat , it shows that： the correlation between canopy temperature and yield emerged in strengthening - weakening strengthening trend, the maximum coefficient of determination R2 in May 22 （R2 = 0.710）. canopy temperature and yield a very significant negative correlation in eight Monitoring Days ,lower canopy temperature of its high yield varieties, while varieties of high canopy temperature of their production is low. Among the tested varieties （lines）, the canopy temperature difference reached 4-5 ℃, between the lowest canopy temperature and the highest canopy temperature va- riety, yield difference between them reached 2.1t/hm^2. Among the relationships between Canopy temperature and yield components ,canopy temperature and thousand grain weight, small ears emerged as negative correlation, from strong to weak the correlation between Canopy temperature and yield and yield components were： yield, thousand grain weight, small ears, grains per spike

关 键 词：冬小麦 冠层温度 水分利用效率 

分 类 号：S512.11[农业科学—作物学]