旱地冬小麦灌浆期冠层温度与产量和水分利用效率的关系  

Relationship of Canopy Temperature with Grain Yield and Water Use Efficiency in Various Genotypes of Dryland Winter Wheat during Grain Filling Stage

作　　者：徐银萍[1] 宋尚有[2] 樊廷录[2] 李兴茂[2] 辛平 

机构地区：[1]甘肃农业大学农学院,甘肃兰州730070 [2]甘肃省农业科学院,甘肃兰州730070 [3]甘肃省林业科学技术推广总站,甘肃兰州730046

出　　处：《麦类作物学报》2007年第3期528-532,共5页Journal of Triticeae Crops

基　　金：中国科学院黄土高原土壤侵蚀与旱地农业国家重点实验室基金项目(10501-162)

摘　　要：为给抗旱节水品种的快速鉴定和筛选提供科学依据,在甘肃陇东旱塬利用红外测温仪测定了23个冬小麦品种的冠层温度,并分析了其与产量、水分利用效率的关系。结果表明,不同基因型小麦在籽粒灌浆期存在着冠层温度高度分异的现象,其差异可反映在产量和水分利用效率上。无论灌浆初期还是中期或中后期,旱地冬小麦产量、水分利用效率与冠层温度均呈极显著的负相关,并且随着灌浆过程的推移,相关性增大。这表明,灌浆期冠层温度偏低的品种具有较高的产量和水分利用效率,冠层温度可作为旱地高产节水小麦品种田间筛选的指标。Canopy temperature （CT） has been considered as a good indicator of a genotype＇s physiological fitness, and can be an effective tool in screening wheat for water use efficiency and high yield, particularly with the advent of portable infrared thermometers. Field studies were conducted to examine usefulness of canopy temperature in screening wheat （Triticum aestivum L. ） genotypes for grain yield and water use efficiency （WUE） at Zhenyuan, Gansu, China, in 2006. 23 winter wheat genotypes were grown under dryland. CTs were recorded after grain filling from 13 ： 30 to 15 ： 30 on 3 clear days. Genotypes exhibited great differences in CT, and the differences were significantly presented in grain yield and WUE of genotypes. In early., middle and middle-late grain filling stage, grain yield or WUE was highly negatively correlated with CT （R^2= 0.53-0.72）, and the R^2 values increased as grain filling proceeded. These results clearly indicated some genotypes with high yield and WUE consistently had low CT values, the low yield and WUE ones had high CT values, and grain yield and WUE can be predicted by taking CT values in field using portable infrared thermometers, which can be used by breeding programs as a potential selection criterion for grain yield and water use efficiency in wheat.

关 键 词：冬小麦 灌浆期 冠层温度 产量 水分利用效率 

分 类 号：S512.1[农业科学—作物学] S311