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双江农场地处双江县孟孟坝区。海拔1045公尺,年平均温度19.4度,年雨量906毫米,有霜期为50天,(即十二月下旬至次年二月上旬),是一个双季稻区。 我场从一九七七年起用南优二号作双季早稻栽种,取得了显著的增产效果。一九七七年试种南优二号10亩,平均亩产1079斤,比常规早稻品种每亩增产250—300斤。一九七八年进行连片示范种植计80亩,平均亩产1150—1200斤,比常规品种每亩增产300—350斤。其中长势较差的16亩(杂种中混入20％的保持系)总产一万
Shuangjiang farm is located in Mengjiang Dam Shuangjiang County. Elevation of 1045 meters, the annual average temperature of 19.4 degrees, the annual rainfall of 906 mm, a frosty period of 50 days (that is, from late December to early February the following year) is a double cropping rice. Our field has been planting double-season early rice with Nanyou No.2 since 1977, achieving remarkable yield increase. In 1977, Nanyou No. 2 10 mu was planted with an average yield of 1,079 catties per mu, which was an increase of 250-300 jin per mu compared with that of the conventional early rice varieties. In 1978, there were 80 mu of contiguous demonstration planting, with an average yield of 1150-1200 jin per mu, 300-350 jin more than the conventional varieties. Among them, 16 mu (mixed with 20% of the maintainers) in the poor growing area have a total output of 10,000