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1987年9月份,本地连遭三次秋寒袭击,日均气温低于20℃,最低气温14.5℃。尤其第一次低温兼刮北风,气候干冷,此时本地汕优63大多正处在幼化6—7期。后两次低温,汕优63正处在抽穗扬花阶段。均有不同程度受到影响。我们在结实率检查时,明显看出同施用N量及后期叶色密切相关。同一组合,凡后期特色淡青的,结实率都达80.283.0％;而极浓缘的,结实率只有22.5—30.3％。表现极显著的直线负相关。其相关
In September 1987, the local community suffered three raids in autumn, the average daily temperature was below 20 ℃ and the minimum temperature was 14.5 ℃. In particular, the first low-temperature and scratch the north wind, the climate is dry and cold, at this time most of the local Shanyou 63 is in the 6-7 period of juvenile. After two low temperature, Shanyou 63 is at the stage of heading and flowering. All affected to varying degrees. We check in the seed rate, it is clear that with the application of N and leaf color are closely related. The same combination, where the latter characteristics of light green, the seed rate reached 80.283.0%; and extremely strong, the seed set rate of only 22.5-30.3%. A very significant negative linear correlation. Its related