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我省自推广早稻趸秧以来,对发展双季稻起了很大的作用。但趸秧的青枯死苗问题尚未得到完全解决。据报道,床土酸碱度是影响小苗生育的一个重要因素。为了验证这一论断在本地区生产上的实践意义,1975年,我们用本场第一生产队的塘泥(pH值为6.5),加入不同量的硫酸或氢氧化钠,调制成pH3—8的几种床土,匀铺在经过翻耕的黄土旱地上。每个处理小块长宽各1.5尺,干缩后,泥厚0.9寸。供试品种为二九青,4月4日播种,每处理播芽谷2.7两(折合亩播干谷480斤),播后塌谷,用中性细黄土覆盖,再平铺覆膜。
Since the promotion of early rice buds in our province, the development of double cropping rice has played a significant role. However, the seedlings of blue dead seedlings issue has not yet been fully resolved. It is reported that bed soil pH is one of the important factors affecting seedling growth. In order to verify the practical significance of this statement in the production of the area, in 1975, we used different levels of sulfuric acid or sodium hydroxide from the first production broth of the field (pH 6.5) to prepare pH 3-8 Of several bed soil, even after plowing in the loess dry land. Each processing length and width of small pieces of 1.5 feet, dry shrinkage, mud thickness 0.9 inches. The test varieties for two nine green, April 4 sowing, each processing sowing Valley 2.7 two (equivalent to sowing 480 acres of dry acres), after sowing valley, covered with neutral fine loess, and then tiled.