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郊区后季稻抽穗开花期(9月下旬到10月上旬),会遇到南下强冷空气的为害,使部分水稻增加空瘪粒,出现“翘穗头”,产量损失严重。据近几年来的调查,后季稻抽穗开花期受低温为害,平均每亩减产70～100斤。为了研究低温对后季稻开花结实的影响,摸清受害规律,为大面积增产提供防治措施,现将我们74年在后季稻抽穗开花期进行低温处理所取得的部分试验结果,介绍如下:
Suburban post-flowering heading stage of flowering (late September to early October), the south will encounter strong cold air damage, so that some empty rice paddy increased grain, appear “Alice head” yield serious losses. According to the investigation in recent years, the post-flowering and flowering of post-season rice are affected by low temperature, with an average yield of 70-100 kg per mu. In order to study the effect of low temperature on the flowering and fruiting of the latter part of rice, find out the law of damage and provide measures for controlling the yield of large area. Now some of the experimental results obtained in our 74 years after low temperature treatment at heading and flowering stage are as follows: