关键词: 低温胁迫, 主茎, 分蘖, 抗冻性, 综合评价, 冬小麦

Abstract: Shawan county is located in the northern slope of Tianshan Mountains and the south fringe of Junggur Basin. The county's economy gives first place to agriculture combining with animal husbandry. The landscape features is of representative in Northern Xinjiang. On the basis of heterogeneity and hierarchy of landscape ecological system,the landscape classification system of the Northern Xinjiang was presented. In our plan,law of regional disparities,man-made disturbance and landscape ecological differentiation were considered as classification principle. Landscape units at different level were adopted. 2 landscape types,7 subtypes,14 classes,28 groups and 75landscape units were divided.

Key words: low temperature stress, main stem, tiller, freezing resistance,  , comprehensive evaluation, winter wheat.