关键词: 壮苗指数, 壮苗指数

Abstract: In order to enrich the three-dimensional cultivation theory of rice and promote the production of rice in high-altitude areas, the impact of elevation on the rice growth, yield and its components and quality was summarized in this article. The results showed that: with the elevation increase, accumulated temperature required for the growth of rice decreased, the whole growth period of rice extended, the tillering stage postponed and the seed setting rate reduced. Yield, effective panicles and grains per spike decreased after increasing with increasing elevation. In terms of quality of rice, elevation had greater impact on the milled rice rate and chalkiness. The milled rice rate had significant increase and chalky grain rate had a clear downward trend with the elevation increase. There was large difference in the studies between elevation and cooking and eating qualities, which needed to be further studied in the future.