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共庆21号系用“银不矮181”和“朝阳一号”杂交选育而成的早熟早籼品种。1972～1973年多点试验,一般亩产700斤以上,最高的亩产达到1000斤左右。1974年扩大试种,表现较好,产量与矮南早一号相仿,在三熟制生产中,是一个较有希望的品种.特征特性(1)植株较矮,高70厘米左右,株型同矮南早一号相似,叶片挺而短.(2)分蘖力较强,抽穗整齐一致,成穗率和结实率都较高,后期转色好,抗病力较强。
A total of 21 lines with “silver is not short 181” and “Chaoyang One” bred early breeding early indica varieties. From 1972 to 1973, more tests were carried out, with a per-mu yield of 700 kg or more. The highest mu yield reached about 1,000 kg. The trial planting was expanded in 1974 with better performance and the yield was similar to that of Diannan Zaoyu, which is a more promising species in the three-cropping system. Characteristic characteristics (1) The plant is short and about 70 centimeters tall, Similar to Dwarf Nanan No.1, the leaves were quite short and short. (2) The tillering force was strong, the headings were neat and uniform, the earing rate and the seed setting rate were both higher, the color was better in the later stage, and the disease resistance was stronger.