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本文以最易发生水稻冷害的日本北见地区(北纬44度)稻作为例,分析了冷害发生的规律,提到了防止或减轻冷害的技术措施。该地区自1895年开始种水稻以来,至今已逐渐发展到十余万亩。自1926年至1971年共发生冷害15次,平均每三年一次,其中连续两年发生冷害的有5次.该地区水稻平均亩产,自1908年至1966年间,由263斤逐步上升到509斤。气象条件比较好的1959年、1961年,平均亩产分别为809斤和831斤。但在15个冷害年,平均亩产192斤,降到100斤以下的有5次。最严重的是1971年,全北见地区平均亩产7斤。
In this paper, rice in North Kita (44 degrees north latitude), which is the most susceptible to rice chilling injury, was used as an example to analyze the law of chilling injury and to mention the technical measures to prevent or alleviate chilling injury. Since the rice cultivation began in 1895, the area has gradually developed to more than 100,000 mu. A total of 15 chilling injury occurred between 1926 and 1971, with an average of once every three years, of which chilling injury occurred for two consecutive years was 5. The average mu yield of rice in this area gradually rose from 263 to 509 from 1908 to 1966 jin. Meteorological conditions are better in 1959, 1961, the average yield of 809 kg and 831 kg respectively. However, in 15 chilling injury years, the average yield of 192 pounds, down to 100 pounds less than 5 times. The most serious is that in 1971, the whole North see the region average yield of 7 kg.