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我省水稻区冬季綠肥以紅花草为主,而紅花草幼苗旺长期正值最寒冷的季节,往往发生冻害。据蕪湖专区农业科学研究所1961年12月30日分别进行盖灰和不加任何复盖物(对照)的对比試驗,結果表明;盖灰的只有部分植株受冻,叶片变黄,开春后植株生长旺盛,部分受冻的叶片也由黄轉綠,开花整齐一致,亩产鲜草四千斤;而对照田则部分植株整株枯萎,叶片由黄变白,乃至冻死,开春后复原较慢,单位面积植株也較稀疏,亩产鲜草仅三千一百三十三斤。由此看来,紅花草在冬季盖灰防冻具有一定的效果。
The winter green manure in the rice area of our province is dominated by safflower grass, while the safflower saplings grow long-term at the coldest season, and frost damage often occurs. According to Wuhu Prefecture Institute of Agricultural Sciences on December 30, 1961 were compared with the cover gray and without any cover (control), the results showed that; covered gray only part of the plant cold, leaves turn yellow, spring after the plant Growth is vigorous, part of the frozen leaves from yellow to green, flowering neatly, yielding fresh grass four kilograms; while the control field part of the plant withered, the leaves from yellow to white, and even frozen to death, open recovery after the spring Slower, the unit area of the plant is also more sparse, only 3,133 kg of fresh grass per mu. Seen in this light, safflower dust in the winter covered with antifreeze has a certain effect.