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近几年来,我们在市气象研究所和市农科院的协助下,在柑桔生产上推广了“冬灌”防冻措施,并观察了它的增温效应。试验地为46亩初产桔园。30亩灌水,16亩不灌水作对照。在寒流降温期(1月16～20日),从1月19日下午3时到20日下午2时止,用多头测温仪,观察地温与气温。地温设 0、-5、-10、-20、-30cm 5个等级;气温设5、10、15、20、30、50、150cm7个等级,每小时观察记载一次。结果如下:
In recent years, with the help of the Municipal Meteorological Institute and the Municipal Academy of Agricultural Sciences, we have promoted the “winter irrigation” antifreeze measures in citrus production and observed its warming effect. Experimental land for 46 mu of fresh orange garden. 30 acres of irrigation, 16 acres of non-irrigation control. In the cold flow cooling period (January 16 ~ 20), from January 19 at 3:00 pm on the 20th at 2:00 pm, with a multi-head thermometer to observe the ground temperature and temperature. Ground temperature set 0, -5, -10, -20, -30cm 5 levels; temperature set 5,10,15,20,30,50,150 cm7 level, observed and recorded once every hour. The result is as follows: