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我区除南部几个县低海拔的平原区外,九月份平均温度一般低于25℃,采用连作晚稻制种,在九月份抽穗开花,异交率低,产量低,或者失败。在山区利用中稻季节进行制种生育期较稳定,花期相遇较有把握。有利于隔离和劳力、农活的安排。制种产量高,种子纯度高。为使中稻制种高产优质,总结两年来的经验,我们认为应掌握几个技术环节。
Except for low altitude plain areas in several southern counties, the average temperature in September was generally lower than 25 ℃. In continuous cropping of late rice, heading and flowering took place in September with low rate of outcrossing, low yield or failure. Seed production in the use of the season in mid-season in mountainous areas is more stable and the flowering season is more certain. Conducive to isolation and labor, farm work arrangements. High seed production, high seed purity. In order to make high-yielding and high-quality Zhongcao seed production and summarize the experience of the past two years, we think we should have a few technical links.