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当前位置: 首页 > 文章 > 辽宁省水稻低温冷害及品种热量分区 中国农业科学 1982,15 (6) 50-58
Position: Home > Articles > COLD INJURY OF RICE AND THE DIVISION OF RICE VARIETY GROWING REGIONS ACCORDING TO LOCAL HEAT QUANTITY IN LIAONING PROVINCE Scientia Agricultura Sinica 1982,15 (6) 50-58

辽宁省水稻低温冷害及品种热量分区

作  者：
董春田;刘政国;吴文钧;刘恒吉
单  位：
辽宁省农业科学院稻作研究所
摘  要：
辽宁省处于北方稻区,冷害发生频繁,约4—5年一遇。一般冷害年减产15-20%,重度冷害年达40%以上,其减产幅度之大,受害面积之广,是其它任何作物和自然灾害所难以比拟的。自1978年开始,通过各科研和生产单位的密切协作,采取多点自然分期播种和平行观测的方法,在省内各稻区进行了较为系统的低温冷害研究工作。三年来,
译  名：
COLD INJURY OF RICE AND THE DIVISION OF RICE VARIETY GROWING REGIONS ACCORDING TO LOCAL HEAT QUANTITY IN LIAONING PROVINCE
作  者：
Dong Chuntian Liu Zhengguo (Institute of Rice, Liaoning Academy of Agricultural Sciences, Shenyang, Liaoning) Wu Wenjun (Agrometeorological Institute of Yingkou City, Liaoning) Liu Hengji (Meteorological Bureau of Shenyang Municipality, Liaoning)
摘  要：
The lower temperature limit for rice seedlings survival in the fields is about 14℃ in Liaoning Province. The safety growth amount in the peak of vegetative growing season is 30, 000-40, 000/m~2 for variety "Xinyin-1" and 25, 000-30, 000/m~2 for combination "Dawn Hybrid". The active accumulated temperature is 900℃ for the former and 800℃ for the latter. There is a linear correlation between head stage and the accumulated temperature before heading. Heading is moved up as the accumulated temperature increases. The effect of sunshine time (ranging from 6 to ll hours) on growth is not significant before heading; but after heading it becomes a key factor for seed setting and maturing. Average temperature below 20℃ in seedling stage and below 19℃ in peak seed-setting stage will lead to "delayed" type of cold injury for variety "Xinyin-1". Average temperature below 23℃ in flowering stage and maximum temperaturebelow 26℃ will cause "obstacle" type of cold injury. According to the distribution of local heat quantity, the varieties grown and their indexes of accumulated temperature in different rice-producing areas of Liaoning Province, six climatic types and rice variety growing regions were divided. It is necessary to reserve 250—300℃ of maximum utilizable accumulated temperature as a safety coefficient of rice growing when heat quantity is used as the main factor to determine the maturity divisions of rice varieties. In order to avoid cold injury and to make full use of heat resource, it is inadvisable to grow varieties with too long or too short growing periods.

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