玉米籽粒水分的快测法误差分析

Error Analysis of Moisture Content in Maize Seeds by Quick Water-Content Measuring Method

以山西省中晚熟区域试验中37个玉米品种为试验材料,用PM-8188-A型谷物水分测定仪在4个环境温度下对玉米籽粒含水率进行水分快测,与传统标准烘干法测定值比较,利用回归分析建立对应的玉米籽粒真实水分数学方程,减小了电容式快测法在田间测定玉米籽粒水分过程中受环境温度影响而导致的误差,对育种家在田间选择含水率低的玉米品种方面具有一定应用价值。温度为10℃~25℃时,电容式快测法测定值随着温度的提高有变大趋势,20℃时测定的误差值最小。

The total of thirty-seven mid-late maturity maize varieties from regional trials in Shanxi province were used as experimental materials. Corn moisture determination meter PM-8188-A was used to measure the moisture in kernel of maize at four different temperatures and the measured values were compared with those by the traditional standard oven drying method. Using regression analysis, the corresponding real water mathematical equations for the maize kernels were established. This mathematical model would minimized the measuring errors caused by the environmental temperature in the process of capacitive quick water-content in kernel of maize in the field. It has certain application value for the breeder to select maize varieties with low moisture content at harvest time. The results showed that the measured value of the capacitor express method tended to increase with the increase of temperature within the range of 10℃ to 25℃, and the minimum measured error value was at 20℃.