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经一九八三和一九八四年的大面积示范,二九丰亩产800～900斤,高的达千斤以上。一九八五年浙江和长江下游各省、市,种植面积将达500万亩左右。其中嘉兴市种植面积将从八四年的14万亩扩大到140万亩。为适应此情况,嘉兴市农林局、农科所联合各县、区有关单位,进行了小区试验和生产示范,现将结果总结如下。 (一)合理布茬培育适龄壮秧据试验,二九丰在浙北地区作二熟制栽培,清明前后播种,全生育期110天左右。作三熟制栽培,谷雨前后播种,全生育期缩短到100天左右,每迟播5天,全生育期缩短2～3天。全生育期≥10℃活动积温在2300℃左右。播种到拔节,播种到齐穗天数都随播
After a large area demonstration in 1983 and 1984, the yield of 800 hectares per mu for 900 hectares was over 900 kilos. In 1985, the provinces, cities and planting areas in the lower reaches of Zhejiang and the Yangtze River will reach about 5 million mu. The planting area of Jiaxing City will be expanded from 14 million mu in 1984 to 1.4 million mu. In order to adapt to this situation, Jiaxing Municipal Bureau of Agriculture and Forestry, Agricultural Institute of the various counties, districts and units, conducted a pilot district and production demonstration, the results are summarized below. (A) reasonable stubble Cultivation age strong seedlings According to the test, nine nine abundance in northern Zhejiang for second crop cultivation, sowing before and after the Ching Ming, the whole growth period of about 110 days. Cultivation for three cooked, before and after planting Guyu, the whole growth period shortened to about 100 days, 5 days delayed broadcast, the whole growth period shortened 2 to 3 days. The whole growth period ≥10 ℃ active accumulated temperature around 2300 ℃. Sowing to jointing, sowing to full spike days with the broadcast