摘要
以山梨、杜梨、南果梨、早酥梨、苹果梨，以及黄海棠、怀来海棠、新疆野苹果为试材，以枝干为样本，在自然条件下用ＱＪＺ型便携式惠斯通电桥测定活体电阻值。结果表明：电阻值与测距呈直线正相关；电阻值与温度呈极显著负相关；无论是多年生枝还是一年生枝，电阻值休眠期较生长期大而稳定；多年生枝较一年生枝电阻值小而稳定；多年生枝粗度与电阻值呈负相关；电阻值与树体生长势有负相关趋势；电阻值与树种品种的抗寒性呈正相关。初步认为，活体电阻法可做为苹果树和梨树树体抗寒性的鉴定方法。
Some fruit trees grown in the Teaching Orchard of Inner Mongolia Insti-tute of Agriultrue and Animal Husbandry were tested under natural conditions.Electricresistance of branches were measured in vivo using Model QJZ Electric Resistance Me-ter.The results showed that there were linear positive correlation between resistancevalue and measuring distance,and positive correlate between resitance value and cold re-sistance of the tree.There were negative correlation between resistance value and tem-perature,diameter of perennial branch,growing intensity of the branch.Resistance valueis higher and stabler in dormancy period than in growing period,and is lower and stablerfor perennial branches than for annial ones.
基金
内蒙古自治区科委攻关项目
