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通过 1997～ 1998年的低温冷害对水稻生育的影响试验 ,可以看出 :分蘖前期低温导致出叶速度和叶色级数减小 ,分蘖中期高温 ,叶龄和叶色恢复正常。 1998年长穗期的低温 ,使出叶速度和叶色级数减少 ,导致有效分蘖率降低 ,齐穗期比历年延迟一周 ;1997年在分蘖中、后期持续高温 ,有效分蘖终止期和最高分蘖期向后延迟 ,叶龄指数增加。为此 ,在不同低温冷害年份 ,建立不同施肥配比的水稻生产函数模型 ,求得最佳施肥配比
Through the experiment of the effects of chilling injury on rice growth from 1997 to 1998, it can be seen that low temperature at early tillering stage leads to decrease of leaf speed and leaf color series, high temperature in middle tillering stage, leaf age and leaf color return to normal. In 1998, the low temperature of the long panicle led to the decrease of leaf speed and leaf color series, resulting in the decrease of the effective tillering rate and the full heading of the panicle. The full heading date was delayed by one week from the previous year. In the middle of late tillering and continuous tillering, Delayed backwards, leaf age index increased. To this end, in different years of chilling injury, the establishment of different fertilization ratio of rice production function model to determine the best fertilization ratio