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一要符合隔离条件。制种区的隔离条件要符合规定的要求,防止其它水稻品种串花混杂。二要亲本种子纯度高。用于制种的父母本种子纯度必须达到国标的规定,否则即使除杂工作抓的再严,种子纯度也难以保证。三要安排最佳花期。在制种抽穗扬花期间,要求温湿度适宜,晴好天气多。若遇连续低温阴雨或高温干旱天气,就会影响种子产量和质量。四要合理施用肥料。制种生产施肥要做到以有机肥为主,氮、磷、钾肥按需配合,只有土壤中营养元素齐全,父母本才能生育良好,达到母本强势花多,父本花粉量充足,高产优质的要求。五要花期花时相遇。父母本花期花时相遇良好,既可提高母本异交结实率,又可减少稻粒黑粉病和裂壳谷的发生,使种子质量提高。
A must meet the isolation conditions. The isolation conditions of the seed production area should meet the stipulated requirements to prevent the hybridization of other rice varieties. Second, the purity of the parent seed is high. The seeds used for seed production must meet the national standard purity requirements of the seeds, or even if the cleaning work again severely stringent, the seed purity is difficult to guarantee. Third, to arrange the best flowering. Flowering during the production of heading, the temperature and humidity requirements, sunny weather is good. In case of continuous low temperature rainy weather or dry weather, it will affect the yield and quality of seeds. Four to a reasonable application of fertilizer. Production and application of fertilizer to achieve organic fertilizer-based, nitrogen, phosphorus and potassium fertilizer on-demand with only the soil nutrient elements complete parental ability to reproduce well, to reach a strong mother spend more, male pollen abundance, high yield and quality Request. Five to spend time to meet. The flowering time of the parents met well, which can improve the rate of male parent outcrossing, but also reduce the occurrence of rice powdery mildew and split shell valley, so that the quality of the seed.