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冷温区气候条件复杂,水稻生长有害因素多,一直被认为是推广种植杂交水稻的禁区。从1982年以来,我们在四川西北的广元、青川县垂直和缓坡200～1,400m内,以及四川盆地沿山冷凉区试验、示范和推广杂交水稻立体高产栽培技术;按海拔梯度和南北坡温差效应供种,改革育秧技术,改变施肥方式,利用丘陵、山地的不同自然条件,趋利避害,充分发挥杂交水稻的增产优势,使冷温区累汁推广杂交水稻29.2万公顷,累计增产39.6万吨.累计增加产值1.2亿元。
The climatic conditions in cold and warm areas are complex and there are many harmful factors for rice growth. It has been considered as a forbidden area to popularize hybrid rice. Since 1982, we have tested, demonstrated and popularized three-dimensional high-yielding hybrid rice cultivation techniques in Guangyuan and Qingchuan counties of 200 ~ 1,400m in the northwest of Sichuan Province and in the cold basins along the Sichuan Basin. According to the elevation gradient and the temperature difference between south and north slopes Effect supply of seed, reform of seedling cultivation techniques, change of fertilization mode, use of different natural conditions in hilly and mountainous areas, and seek advantages and avoid disadvantages, give full play to yield advantages of hybrid rice, so cold and cold area tired juice to promote 292,000 hectares of hybrid rice, cumulative increase of 396,000 Ton, a total increase of 120 million yuan output value.