Abstract: Based on the defintion of growth condition by the multiply of leaf area and the plant height, regarded Dongzhiyuan of loess plateau of Eastern Gansu as a representative,the crop condition and growth status of winter wheat was calculated in different key growth phases such as stop-growth, drawing-knar and milk-ripe. The relationship between the crop condition and meteorological factors were analyzed in every phase. The results showed that there were no significant correlation between them in stop-growth, and that the growth condition in drawing-knar had a positive correlation with precipitation and a negative correlation with ≥ 0℃accumulated temperature and sunlight hours turn-green to drawing-knar, and that the growth condition had a positive correlation with sunlight hours during phase from milk-ripe to drawing-knar.

Key words: Winter wheat, Winter wheat, Growth condition, Assessment, system, Eestern Gansu