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温度条件是作物高产生理中的决定性因素之一。随着测试手段的进步,水稻温度的研究也逐步深入,并取得很大成绩。以日本青森县为例,三十年代前,好年份水稻单产糙米每公顷约2.6—3吨,冷害年份约1.2—1.4吨。由于水稻冷害研究成果的应用,1955年好年成约4.2吨,1956年冷害年约4.1吨,1976年的特重冷害年仍保持在每公顷4吨的单产水平,表明温度研究成果已转化为生产力。
Temperature conditions are one of the decisive factors in crop physiology. With the improvement of testing methods, the research of rice temperature has been gradually deepened and made great achievements. Take Aomori Prefecture in Japan as an example. Before the 1930s, the annual output of paddy rice per hectare was about 2.6-3 tonne per hectare and about 1.2-1.4 ton per year for chilling injury. Due to the application of the research results on chilling injury in rice, the annual average annual rate of about 4.2 tons in 1955 and 4.1 tons in the chilling injury in 1956 were still at the level of 4 tons per hectare in 1976, indicating that the temperature research results have been transformed into productive forces.