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黑河地区水利资源丰富,土壤肥沃,对发展水稻生产十分有利。但是由于纬度高,地形复杂,南北之间,山区、半山区、沿江平原区之间,热量相差悬殊,生长期长短不一又带来很多不利因素,对品种的选择也极为严格。本文用二十年(1958～1977年)黑河地区气象资料加之必要的辅助试验,讨论极早熟、早熟、中晚熟不同熟期类型水稻品种在各个发育阶段所需要的热量指标和低温冷害,从而正确选用品种和制定有效的栽培技
The Heihe area is rich in water conservancy resources and fertile soil, which is very favorable for the development of rice production. However, due to the high latitude and complex terrain, there is a great difference in heat between the north and south, the mountainous area, the semi-mountainous area and the plains along the Yangtze River. Due to the unfavorable growth periods, the selection of cultivars is also very strict. In this paper, we use the meteorological data of Heihe area from 1958 to 1977 plus some necessary auxiliary tests to discuss the caloric index and low temperature chilling injury of the rice varieties with very early maturity, early maturity and medium maturity and maturity, so that they are correct Selection of species and the development of effective cultivation techniques