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在海拔1140米,土质黄壤的条件下,旱作稻外部形态及某些生理变化的结果表明:与水稍相比,旱作稻主茎总出叶片数减少0.6～2.8叶,植株变矮16.8～37.1cm,生育期延长5～26天,分蘖节位广、时间长,成穗率平均降低47.9％,有效穗一般较少,抽穗历期长,光合产物分配到穗部少,结实率低,粒重下降,经济系数低,产量降低一半以上。
Under the conditions of 1140 m above sea level and yellow earthy soil, the external morphology and some physiological changes of rainfed rice showed that compared with water, the total number of dry-leaved main stems decreased by 0.6-2.8 leaves and the plant became shorter by 16.8 ~ 37.1cm, and the growth period was extended from 5 to 26 days. The tiller node was wide and the time was long. The rate of ear formation was reduced by 47.9% on average, there were fewer effective panicles, longer heading time, less photosynthate distribution to spikes and lower seed setting rate , Grain weight decreased, economic coefficient is low, output is reduced by more than half.