土壤水分状况对猕猴桃叶片蒸腾速率影响研究

Study on the Effect of Soil Moisture Status on the Transpiration Rate of Kiwi Fruit

针对传统方法在计算猕猴桃叶片蒸腾速率时,存在结果不准确,修正率不高问题,为此,提出一种新参数修正法解决上述问题。基于高光谱传感器对猕猴桃叶面积蒸腾速率动态模拟分析方法,构建蒸腾模型;运用该模型分析各因素对蒸腾速率的影响,通过函数修正方法获得土壤水分状况系数,从而实现猕猴桃叶面积蒸腾速率的准确计算。为了验证方法的有效性,设计对比实验。结果表明,湿度和温度对猕猴桃叶面积蒸腾速度的影响较大,猕猴桃叶面积蒸腾速率与温度呈正相关,与湿度成负相关;该方法的蒸腾速率修正率与蒸腾速率准确率都可达到98%,实验结果可以为猕猴桃的种植提供参考。

Aiming at the problem of inaccurate results and low correction rate when calculating the transpiration rate of kiwi fruit leaves with traditional methods,this paper proposed a new parameter correction method to solve the above problems.Based on the dynamic simulation and analysis method of the leaf area transpiration rate of kiwi fruit by hyperspectral sensor,the transpiration model was constructed.The model was used to analyze the influence of various factors on the transpiration rate,and the soil moisture status coefficient was obtained through the function modification method,so as to realize the accurate calculation of the leaf area transpiration rate of kiwi fruit.In order to verify the effectiveness of the proposed method,a comparative experiment was designed.The results showed that humidity and temperature had great effects on the leaf area transpiration rate of kiwi fruit.The leaf area transpiration rate was positively correlated with temperature,but negatively correlated with humidity.The correction rate of transpiration rate and the accuracy of transpiration rate of the method in this paper can both reach 98%,and the experimental results can provide reference for kiwi fruit planting.