玉米叶片生理电容与含水率表达模型的研究

Study on the Model between Corn Leaf Physiological Capacitance and Moisture Content

为了能对玉米水分亏缺进行准确的判断,进而做出适时适量的灌溉,对玉米电特性与叶片含水率进行了深入的研究。通过叶片非离体和离体实验数据采集及数据分析处理,得到在100Hz、1k Hz、10k Hz3种不同频率下,非离体与离体玉米叶片电容都随着时间推移逐渐变小,非离体玉米叶片电容的变化曲线相对离体玉米叶片的变化曲线更加平缓,且100Hz频率下玉米叶片电容值的变化幅度最大。离体玉米在夜间电容值没有延续之前趋势一直下降,甚至有了提高,这与晚间叶片停止光合作用,叶片会适当吸收空气中的水分有关。通过对叶片电容与含水量实验数据的拟合,拟合检验值R2为0.96327,可以得到叶片含水量与叶片电容呈线性关系。

In order to make accurate judgment on the corn moisture deficit , make appropriate and timely irrigation .This paper studied the corn electrical characteristics and leaf water content , through data acquisition and data processing of the leaves in vivo and in vitro .In the 100HZ,, 1kHZ and 10kHZ three kinds of different frequencies , in vivo and in vitro leaf capacitance with the passage of time gradually become smaller , variation curve in curve body corn leaf capaci-tance relative isolated maize leaf is more gentle ,the range of capacitance of maize leaves under the frequency of 100Hz is greatest .Isolated corn in the night has not according to the trend of the capacitance value been declining , even with the increase , this has something to do with the evening leaf photosynthesis will be stopped and leaf will be appropriate to ab -sorb the moisture in the air .The leaf capacitance and water content of experimental data fitting , fitting test value R2 0 . 96327 , can get the leaf water content and leaf capacitance linearly .