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一、电热温床场地的选择电热温床应设在温室里,辽北地区最好设在加温温室内。因为蔬菜秧苗生长主要受气温影响,地温只起补偿作用。另外,气温对用电量的多少也有较大的影响。利用电热温床播种,地温高,出苗快而整齐。出苗后,气温对秧苗生长起主导作用。此时如果气温低,即使提高地温,也远远补偿不了气温低造成的影响。据我们1983～1984年试验,39天平均气温17.8℃、地温20.1℃的处理比气温14.3℃、地温23.8℃的处理全株干重增加了1倍;用电量仅为后者的23.2％,39天总耗电量每平方米差53.44℃。按每间温室铺设15平方米电热温床计算,前者比后者节电801.5度。如果把气温由14.3℃升到
First, the choice of electric hotbed site Electric hotbed should be located in the greenhouse, the best in northern Liaoning heating greenhouse. Because the growth of vegetable seedlings mainly affected by temperature, ground temperature only play a compensatory role. In addition, the temperature on the amount of electricity also have a greater impact. Seeding using electric hotbed, high temperature, fast and neat emergence. After emergence, temperature plays a leading role in the growth of seedlings. At this time if the temperature is low, even if the increase in ground temperature, but also far can not compensate for the impact of low temperature. According to our tests from 1983 to 1984, the average temperature of 39 days was 17.8 ℃. The treatment of the ground temperature of 20.1 ℃ was double that of the temperature of 14.3 ℃ and the ground temperature of 23.8 ℃. The electricity consumption was only 23.2% 39 days total power consumption per square meter difference of 53.44 ℃. By laying 15 square meters per hotbed hotbed calculation, the former than the latter power-saving 801.5 degrees. If the temperature rose from 14.3 ℃