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在杂优夏季制种中,应坚持质量第一的观点,生产出优质高产的杂交一代种子,这样,就更能发挥杂交水稻强大的增产优势。一、夏季制种的主要技术措施我县是双季稻种植制度,杂优制种一般都是秋季进行,虽然科研部门一再提出夏制,但未得到很好应用和推广。在上年夏制示范工作中,我们主要抓了四条措施。 1.安排适宜的播期和错期。我县夏制的安全授粉期以8月中、下旬为佳,这时期雨水少,天气晴朗,温度稳定在27～30℃。因此,第一期父本于5月15日播种,第二期在5月20日,第三期5月
Hybrid hybrid summer seed production, should adhere to the quality of the point of view, to produce high-quality and high-yielding hybrid generation of seeds, so that hybrid rice can even play a strong yield advantage. First, the main technical measures of summer seed production My county is a double cropping system, hybrids are generally carried out in autumn, although the scientific research departments have repeatedly proposed summer, but not well applied and promoted. During the demonstration work in the summer of last year, we mainly took four measures. 1. Arrange suitable sowing date and wrong date. Summer pollination in our county in mid-August, late is better, less rainfall during this period, the weather was fine, the temperature stable at 27 ~ 30 ℃. Therefore, the first paternity sowed on May 15, the second on May 20, the third period May