基于冠层温度的菜心缺水指数模型初步试验研究(英文)

Preliminary research on model for determining crop water stress index of flowering Chinese cabbage based on canopy temperature

以柳叶菜心为研究对象 ,测试了不同干旱条件下的土壤含水量、空气温湿度和冠层温度等参数 ,确定了作物缺水指数经验模型的参数 ,并针对太阳辐射强度对模型做了改进。研制了蔬菜旱情检测系统 ,利用红外测温仪、土壤含水量传感器等 ,可以实时测得田间作物的水分亏缺状态 ,为同类研究提供了测试手段和数据分析方法。

In this paper canopy temperature was measured with an infrared thermometer, air temperature, dry and wet-bulb temperature, and soil water content were measured as well to establish the model for determining the CWSI(crop water stress index) of flowering Chinese cabbage. The relationship between canopy-air temperature difference and vapor pressure deficit was determined. The preliminary model was established with regard to the influence of radiation intensity. A microcomputerized real-time data acquisition system was developed to monitor water-stress status for scheduling irrigation of vegetables.