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一、材料和方法试验于1979和1980年在扬州市郊我院实验农场进行,采取不同栽培方式和不同品种(组合)比较的复因子试验.栽培方式分为露地和塑料薄膜小棚覆盖栽培两种.露地栽培供试各品种(组合)均于12月中旬冷床播种育苗,次年4月上旬定植,分设双行小区,行距2.25尺,株距0.8尺,每区栽30株,面积54尺~2,随机排列,重复三次,土壤肥力中等,栽培措施与当地大面积生产基本相同.小棚栽培均于12月初播种育苗,3月中旬定植,小区面积和行株距同上,未设重复.栽后扣棚约一个月,按天气情况进行温、湿度调节和水肥管理,促进早发.4月20日左右去棚,以后管理同露地栽培.供试品种(组合),1979年为北京早红、提留、绿
Materials and Methods Experiments were carried out in experimental farms in our hospital in suburbs of Yangzhou City in 1979 and 1980. The cultivation methods were divided into open field and plastic film shed covering cultivation of two kinds of cultivars with different cultivation methods and different varieties (combinations) All the cultivars (combinations) in open field were sown in cold beds in mid-December and planted in early April in the following year. There were two-line subdivision with a spacing of 2.25 feet and a plant spacing of 0.8 feet. 2, randomly arranged, repeated three times, medium soil fertility, cultivation measures and local large-scale production is basically the same.Speaker planting seedlings are sown in early December, mid-March planting, plot area and line spacing above, there is no duplication. Buckle shed about a month, according to the weather conditions, temperature and humidity regulation and management of water and fertilizer to promote early onset .20 on the left to shed, after the management of the same open field cultivation for the test varieties (combinations), 1979 Beijing early red, Till left, green