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去年我县推广杂交水稻晚季栽培32万亩,占晚稻面积64%,平均亩产比常规水稻增产148斤,单产和总产都超过了早稻,全年粮食获得大丰收。根据我县生产实践,谈谈杂交水稻晚季栽培的技术措施。一、适期播种,稳中求高杂交水稻大部分具有低纬度籼稻类型特性,喜温怕寒,对低温敏感,安全齐穗要求日平均温度在23℃以上。低于23℃,卡颈穗多,空秕率高。从我县气象资料分析,晚季栽培安全齐穗期在9月15日前后,部分高寒山区还要早2—3天。根据杂交水稻感温性强的特点,作晚稻栽培,播种过早,秧易老化,过迟播种,又不能保证安全齐穗。都会影响产量。在适期播种的情况下,秧龄以35—40天为好,不宜超过45天。要从安全齐穗出发,参
Last year, my county promoted the cultivation of 32 million mu of hybrid rice in the late season, accounting for 64% of the area of late rice. The average yield per mu was 148 kg more than that of conventional rice. The yield and total output surpassed that of the early rice and the whole year saw a large harvest. According to our county production practice, talk about the technical measures for hybrid rice cultivation in late season. First, the appropriate sowing, steady demand for the most hybrid rice has the characteristics of low-latitude indica rice type, Hi and cold, sensitive to low temperature, safe and full requirements daily average temperature above 23 ℃. Below 23 ℃, card neck spike, high empty rate. Meteorological data from the county analysis, the cultivation of late-season security full heading around September 15, some alpine mountains even 2-3 days earlier. According to the characteristics of hybrid rice sensible to strong, late rice cultivation, sowing too early, easy to seedling aging, sowing too late, but also can not guarantee the safety of Qi. Will affect the output. Sowing in the appropriate circumstances, the seedling age 35-40 days as well, not more than 45 days. To start from the full range of safety, participation