基于叶片电特性和叶水势的植物缺水度研究

为了快速准确诊断植物缺水状况,试验研究了植物缺水信息与植物叶片电特性和叶水势之间的变化规律.结果表明植株干旱程度与叶片电特性和叶水势按一定规律变化.但叶水势由于受气象条件影响日变化较大,只有在相同时段内的变化才具规律性,测量与比较都较繁琐.而叶片电容受环境影响较小,日变化小,测量更简洁直观,是快速准确获取植物缺水信息的较理想的新方法.

Study of plant water lack message based on electric property and water potential of leaf

The relationship between the plant water lack degree and the electric property and water potential of leaf was studied with an aim of improving the measurement accuracy and speeding-up of information transfer. Leaf water potential of a plant fluctuated in the course of a day, which was dependent on change in weather conditions and was also controlled by certain intrinsic rules of physiology of the plant. Both measurement and comparison were complex. Fluctuation of leaf capacitance within a day was relatively inappreciable. The method described in this paper is quite easy and gives conspicuous result. It is just a new desirable method in obtaining the plant water lack degree quickly and exactly.