加氧灌溉温室甜瓜植株蒸腾特征及模拟

Research on Characteristics and Simulation of Greenhouse Muskmelon Plant Transpiration under Aeration Drip Irrigation

利用热技术方法研究了不同天气条件下温室甜瓜植株蒸腾速率的变化特征,分析了植株蒸腾与环境因子的相关关系,并利用环境因子对植株蒸腾进行了模拟。结果表明,晴天条件下温室甜瓜植株蒸腾日变化基本呈对称单峰曲线,蒸腾速率与太阳总辐射、气温、光合有效辐射和相对湿度的相关性较强,利用该环境因子预测蒸腾精度较高;阴天和雨天条件下温室甜瓜植株蒸腾日变化规律性较弱,蒸腾速率与环境因子的相关性较差。调控温室辐射强度和相对湿度是实现节水高效农业的有效手段。

Plant transpiration ratio＇s diurnal variation of greenhouse muskmelon under different weather conditions by using heat technology was analyzed, the relationship between plant transpiration and environmental factors was discussed, and plant transpiration by environmental factors was simulated. The results showed that the diurnal variation of plant transpiration of greenhouse muskmelon presented symmetric single peak curve, plant transpiration ratio had a strong relationship with environ- mental factors such as solar radiation, air temperature,photosynthetically avtive radiation and relative humidity. Plant transpira- tion ratio＇s diurnal variation of greenhouse muskmelon under cloudy day and rainy day had no significant regularity, and the relationship between plant transpiration ratio and environmental factors was weak. It was an efficient way to realize water sav- ing agriculture through controlling radiation and relative humidity of greenhouse.