摘要： 在河北昌黎于冬季分期采集露地越冬的玫瑰香葡萄一年生枝条进行电导度、电阻率、含水量和比重的测定.回归分析表明,枝条死亡率与电导度呈负线性关系,与电阻率呈正线性关系;而枝条死亡率与含水量和比重呈负线性关系.表明葡萄越冬致死的主要原因是失水.通径分析结果表明,在各气象因子中,引起葡萄枝条死亡的主导因子是低湿度(<30%)日数,10厘米地温负积温和高于年平均值的风速的日数.当三者分别达26天、-153.7°C和80天时,葡萄枝条会全部死亡.

关键词: 葡萄, 电导度, 含水量, 气象因子

Abstract: The vines of "Muscat Hamburg" grape were collected in different periods during winter, and their electric conductivity, electric resistivity, water content and specific gravity were determined. The results of regress analysis indicated that the vine death rate was negatively correlated with its electric conductivity, water content and specific gravity, and positively with its electric resistivity. These facts showed that the main cause of vine death was the great water loss of the vine. The principal meteorological factors causing the vine death were the day number of relatively low humidity (<30%), the total heat summation of the soil temperature (below 0°C) in 10 cm depth and the number of day with wind the speed of which was over and above the average wind speed in the winter of the year. If these three meteorological factors respectively reached the levels (26days,-153.7°C and 80 days), the vines would completely die.

Key words: Grape, Electric conductivity, Water content, Meteorological factors