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从一九七五年以来,凤冈县在杂交水稻的制种生产中,普遍遇到了花期不遇,或花期相遇时段的气候条件不好,造成授粉率低,产量不高等问题。凤冈县良种场,在一九七六年因各种措施得当,成为全省水稻杂交制种的高产单位(最高亩产208斤)。为了攻克花期相遇关,从气象条件上保证安全授粉,夺取制种高产,我们根据凤冈县良种场杂交制种的资料和附近社、队的调查材料,结合凤冈气象站(距良种场三华里)的气象资料,对凤冈县杂交水稻制种生产的最适花期和有效播期作初步的气候分析如下。
Since 1975, Fenggang County has generally encountered such problems as the poor flowering period during the seed production of hybrid rice or the bad climatic conditions at the time of flowering encounter, resulting in low pollination rate and low yield. Fenggang County seed market, in 1976 due to various measures properly, become the province’s hybrid rice seed production unit (the highest yield 208 kg). In order to overcome the relationship between flowering period, to ensure safe pollination from the meteorological conditions, to seize high yielding, we seed according to Fenggang County hybrid seed production information and the investigation team near the community, the team, combined with Fenggang meteorological station Huarui) meteorological data, Fenggang hybrid rice seed production of the most suitable flowering and effective sowing date for the initial climate analysis is as follows.