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本文提出了鉴定小麦抗旱性的一种新方法——连续升温电导法。用本方法在玉米、高粱上作试验,也有同样结果。1 仪器组成及测定方法1.1 仪器组成 本套仪器由DDS-11A型电导率仪及DJS-1型电导电极、电热磁力搅拌器、XWD1-100型记录仪、0～50℃,50～100℃精密温度计(最小分度值0.1℃)各 1支,500ml烧杯及杯盖(自制)、磁子等组成。1.2 连续升温电导的测定方法 用信号线连接好电导率仪及记录仪。选取小麦等作物一定叶位的叶片约5g,用自来水洗净叶面,再用蒸馏水冲洗两次。吸水纸吸干叶面浮水,称取4.0g样品,剪成1cm左右的叶段。放入盛有350ml蒸馏水的烧杯中,置真空干燥器内抽气10分钟,使叶段下沉。取出后,将烧杯放在电热磁力搅拌器上,盖上插有温度计和电导电极的杯盖。打开搅拌器开关,调好转速,记录初始温度。同步打开电导率仪的测定开关及记录仪的记录开关,同时将电热磁力搅拌器的温度调节开关打到二档,开始测定。
In this paper, a new method to identify the drought resistance of wheat - continuous warming conductivity method was proposed. With this method in corn, sorghum for the test, also have the same result. 1 instrument composition and determination of 1.1 Instrument The instrument consists of DDS-11A conductivity meter and DJS-1-type conductivity electrode, electric magnetic stirrer, XWD1-100 type recorder, 0 ~ 50 ℃, 50 ~ 100 ℃ precision Thermometer (the smallest division 0.1 ℃) each one, 500ml beakers and lid (made), such as magnetic components. 1.2 continuous heating conductivity measurement method with a signal line connected conductivity meter and recorder. Select the leaves of certain crops such as wheat leaves about 5g, washed with tap water leaves, and then rinsed twice with distilled water. Absorbent paper blot dry leaves, weighed 4.0g samples, cut into about 1cm leaf segments. Into a beaker containing 350ml of distilled water, set the vacuum dryer exhaust for 10 minutes, the leaf segment sink. After removal, the beaker on the electric magnetic stirrer, covered with a thermometer and the electrode cap inserted. Open the mixer switch, adjust the speed, record the initial temperature. Simultaneously turn on the measuring switch of the conductivity meter and the recording switch of the logger, meanwhile, set the thermostat of the electric magnetic stirrer to the second gear to start the measurement.