番茄结果期冠层叶-气温差的影响因子研究  

Research on the Impact Factors of the Canopy Leaf-air Temperature Difference in the Tomato's Fruiting Period

作　　者：刘婵[1,2] 范兴科[1,3] 

机构地区：[1]中国科学院/水利部水土保持研究所,陕西杨凌712100 [2]中国科学院研究生院,北京100049 [3]西北农林科技大学,陕西杨凌712100

出　　处：《灌溉排水学报》2011年第6期107-110,共4页Journal of Irrigation and Drainage

基　　金：国家863计划课题(2011AA100509);中央高校基本科研业务费专项资助资金

摘　　要：主要分析了番茄结果期的冠层叶-气温差(ΔT)和土壤容积含水率(SW)之间的关系。结果表明,在晴天阳光照射充足的情况下,冠层温度(Tc)和气温(Ta)的变化一致,在13:00—15:00期间,Tc和Ta达到最大值。14:00时ΔT与SW之间有较好的线性负相关关系,番茄结果期的水分供需临界ΔT为-1.5℃,当ΔT≥-1.5℃,则认为作物开始处于缺水状态。This paper has analyzed the relationship between Canopy leaf-air temperature difference （△T） and soil volumetric water content （SW） during the tomato＇s fruiting period. The results show that： in the sunlight, the canopy temperature （Tc） change consistently with the temperature （Ta）, and Tc and Ta reached the maximum value during 13：00-15：00 for the leaf evapotranspiration being the strongest at this time which very easily lead to water shortage of tomatoes. It is also found that there have good linear negative correlation between AT and SW at 14 ： 00, threshold of the AT is -- 1.5 ℃ in the tomato＇s fruiting period, and the plant will be in the state of water shortage when the AT is greater than or equal to -1.5℃.

关 键 词：番茄 冠层温度 气温 容积含水率 

分 类 号：S641.2[农业科学—蔬菜学]