我所在1967年用早粳“科情3号”作母本与晚籼“矮龙129”作父本进行杂交,经过几年的选育,终于在1971年育成一个晚籼早熟高产、抗逆性强、能避过寒露风的优良品种“科龙一号”。1972年在本所示范种植19.3亩,平均亩产821斤,最高达1033斤。在全县20个点试种,均获增产。在瘦田区的瑶安公社竹园生产队深脚七等田试种1亩,在没有基肥,只施追肥碳酸氢胺7斤的情况下,亩产501斤,比往年插其他品种亩产300斤以下增产70％。在中等田区的星子公社水源第四生产队试种,亩 In 1967, we used the early japonica “Section 3” as the female parent and the late indica “Long Long 129” as the male parent. After several years of breeding, finally in late 1971 bred a late indica high yield, resistance Strong, can avoid cold dew the good varieties “Kelong One.” In 1972, 19.3 mu of land was planted in our institute, with an average yield of 821 kilos and a maximum of 1,033 kilos. 20 points in the county test species, have been increased production. In Yaotian District Yao’an commune Chuk Yuen production team deep foot seven other fields to test 1 mu, in the absence of base fertilizer, fertilizer application of only 7 kg of ammonium bicarbonate case, mu yield of 501 pounds, than in previous years to insert other varieties of mu 300 pounds the following increase of 70%. At Zhongtian Commune, the fourth production team of Zhongzi Commune trial planting, mu