Influence of different soil water in seedling stage on root and shoot biomass accumulation of winter wheat

An experiment was designed to find the influence of soil water in seedling stage on root and shoot of winter wheat. The experiment consists of 5 water treatments, including mild stress treatment (SB) and severe stress (SC) since three-leaf stage, mild stress treatment (FB) and severs stress (FC) treatment since seedling stage. The results show that root and shoot of winter wheat in all treatments are not susceptive to different water in early seedling stage. After sowing 16 days, weight of root and weight of shoot decrease with reducing of soil water. As for growing rate of every day, root growth rate of SB treatment and that of SC treatment are superior to that of FB treatment and that of FC treatment after planting 20 days and 28 days; While shoot growth rate of SB treatment and SC treatment are larger than that of FB treatment and FC treatment after planting 28 days and 35 days; after 42 days, shoot weights of SB treatment and SC treatment are larger than that of FB treatment and FC treatment. During winter wheat growing period, ratio of root weight to total weight in SB treatment and SC treatment is bigger than that of FB treatment and FC treatment; however, that of shoot has same result only in reproductive stage. The maximum ratio of root to shoot of SB treatment is reached at reproductive growth stage.