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1977年,我们通过分期播种,鉴定早稻各品种适宜秧龄的有效积温指标,以便及时掌握生长动态,避免超秧龄,为早稻高产做好气象服务工作。一、试验方法试验品种为二九青、松粳二号、中秆早、原丰早和广陆矮四号。播种期,二九青4月28日,中秆早、原丰早4月26日,松粳二号4月25日,广陆矮四号4月24日。移栽期根据10℃以上的有效积温来确定,为了观察各秧龄的生育特性,每个品种又根据不积温分三期移栽。移栽密度为3×4寸见方,每
In 1977, we staged sowing and identification of effective accumulated temperature indicators for early rice varieties for seedling age in order to keep abreast of growth dynamics, avoid over-seedling age and do meteorological service for high-yielding early rice. First, the test methods Test varieties of two nine green, Songjing two, early in the stalk, the original abundance early and wide land short Fourth. Sowing period, February 29 Green April 28, early in the stalk, the original abundant morning April 26, Songjing two April 25, Guanglu short Fourth April 24. Transplanting period according to the effective accumulated temperature above 10 ℃ to determine, in order to observe the reproductive characteristics of each seedling age, and each species is not under the temperature of three transplants. Transplanting density of 3 × 4 inch square, each