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一、前言安徽省江淮丘陵区地跨滁县、六安两专区。粮食生产历来以水稻为主,种植面积約一千六百五十万亩,占耕地面积50%左右,是我省主要产稻区(稻田面积占全省水田面积56.5%),其中一季中稻又占70—80%。所以提高一季中稻产量对提高本地区及全省水稻产量都具有重要意义。但当前由于迟栽中稻占有相当比重,对这一地区水稻增产常常造成不利影响。据调查,1963年中稻迟至“芒种”后栽插的,六安专区占中稻实栽面积23.2%,滁县专区占30%。其中合肥(北緯三十一度五十三分)以南的霍山、舒城、廬江、六安等县比重較小,約占10—
I. Introduction Anhui Jianghuang Hilly area across Chu, Lu’an two areas. Rice production has always been the main grain production, planting an area of about 1650000 acres, accounting for about 50% of arable land, is the main producing rice province (rice paddy area of paddy field area of 56.5%), including one season rice Accounting for 70-80%. Therefore, increasing the production of rice in the first season will be of great significance to improving the output of rice in the region and the whole province. However, due to the fact that late rice planted in China occupies a large proportion, it is often adversely affected the rice yield in this area. According to the survey, after mid-late 1963 Rice Planting was introduced, the Lu’an area occupied 23.2% of the area planted with medium-sized rice and 30% of the Chu area. Among them, Huoshan, Shucheng, Lujiang and Lu’an Counties to the south of Hefei (31.5 degrees north latitude) are relatively small, accounting for 10-