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抗寒性冻害可减少单位面积株数和使幸存植株的活力减弱,因而对第一产量组成因素有不良的影响。虽然有效分蘖能力强的品种可以部分地或全部地弥补冻害的损失,但仍应尽量保存秋季产生的所有活的植株,这样就可形成较多的主穗,对第三、第四产量组成因素有利。春季出生的分蘖可能延长生长期,那是不合乎需要的。
Cold frost damage can reduce the number of plants per unit area and reduce the vitality of surviving plants, and thus have an adverse effect on the composition of the first production. Although the effective tillering varieties can partially or fully compensate for the loss of frost damage, all living plants produced in autumn should be preserved as much as possible so that more main ears can be formed, and the third and fourth yield components favorable. Spring-born tillers may prolong the growth phase, which is undesirable.