不同水肥处理下冬小麦冠层含水率与温度关系的研究

研究了不同水肥处理下冬小麦冠层含水率与冠层温度的关系。结果表明,随灌水量增加,冬小麦冠层含水率呈逐渐增加的趋势,灌水量达一定程度后,冠层含水率反而下降,冠层温度表现出与冠层含水率相反的趋势;冠层含水率与冠层温度呈显著负相关。两品种施氮处理冠层含水率均明显高于不施氮处理。“京冬8号”各施氮处理冠层含水率随施氮量增加呈逐渐降低的趋势,冠层温度则随施氮量增加而上升;其冠层含水率与冠层温度存在显著负相关关系。“中优9507”各施氮处理不具“京冬8号”的规律性,但其冠层含水率与冠层温度也呈负相关。用冠层温度反映冠层含水率具有较高的可靠性。

Relationship Between Canopy Water Content and Temperature of Winter Wheat Under Different Water and Nitrogen Treatments

Under treatments of different water and nitrogen applied level, the relationship between canopy water content and canopy temperature was studied. It showed that the canopy water content went up gradually with the applied water increased. But when the applied water exceeded its threshold, the canopy water content decreased, while the canopy temperature kept the same. There was negative correlation between canopy water content and canopy temperature. The canopy water content under nitrogen treatments was higher than that under non nitrogen treatments. The canopy water content of all nitrogen treatments of "Jingdong 8" decreased with the nitrogen applying quantity and the canopy temperature increased. There were different regularities in all nitrogen treatments of "Zhongyou 9507" to those of "Jingdong 8". It was practicable for using canopy temperature to judge the canopy water content.