【摘要】 为深入了解鸡毛菜生长期内冠层温度的差异性变化以及分布特性,通过不同灌溉处理下的鸡毛菜栽培试验,利用红外检测技术连续获取植株冠层温度的动态变化数据进行分析。结果表明:(1)三种水分处理下鸡毛菜(‘华王’)各生长时期植株冠层温度,均呈随着基质含水量的升高而降低趋势,即饱和灌溉处理<正常灌溉处理<缺水灌溉处理。(2)鸡毛菜(‘华王’)生长期内冠层温度变化与环境大气温度变化显著相关,且冠层温度变化强度小于空气温度。(3)鸡毛菜(‘华王’)冠层温度日变化规律呈现先上升再降低的趋势,6:00开始逐渐上升,12:00—14:00达到峰值,之后逐渐降低。(4)鸡毛菜(‘华王’与‘抗热605’)冠层温度在植株空间分布趋势为:底部子叶温度最高,由最底部向上L1、L2、L3、L4、L5温度依次降低,顶部L5温度最低。研究结果可为基于冠层温度的快速检测,实现对鸡毛菜工厂化生产过程的精准灌溉管理提供理论依据。更多还原

【Abstract】 In order to obtain the variations and distribution characteristics of canopy temperature during the growth period of seedling stage of non-heading Chinese cabbage,the dynamic change data of canopy temperature of seedling stage of non-heading Chinese cabbage were obtained continuously by using infrared detection technology through cultivation experiments under different irrigation treatments.The results showed that:(1)The canopy temperature of seedling stage of non-heading Chinese cabbage ‘Huawang’ under three water treatments decreased with the increase of substrate water content,:saturated irrigation treatment < normal irrigation treatment <water shortage irrigation treatment.(2) There was a significant correlation between the variations of canopy temperature with the seedling stage of non-heading Chinese cabbage ‘Huawang’ and the change of air temperature and the change intensity of canopy temperature was less than that of air temperature.(3) Daily variation of canopy temperature of seedling stage of non-heading Chinese cabbage ‘Huawang’ showed that the canopy temperature firstly increased and then decreased,gradually increased from 6:00 a.m.,and reached to the peak around 12:00—14:00,and then gradually decreased.(4) Spatial distribution characteristics of canopy temperature of seedling stage of non-heading Chinese cabbage showed the following law: the temperature of cotyledons at the bottom was the highest,L1,L2,L3,L4,L5 from the bottom to the top decrease in turn,and L5 at the top was the lowest.The results could provide a theoretical basis for the rapid detection of canopy temperature to realize the precise irrigation management of seedling stage of non-heading Chinese cabbage.更多还原