Abstract:

In order to study the production of the main push in South China's super-yield rice root system, including root distribution and root activity at all levels and other physiological and ecological characteristics and their impact on the shoot. To use super rice ‘Yuexiangzhan’, ‘Guinongzhan’, ‘Tianyou 998’, ‘Zhongzao 22’ for the material. Based on the four supper-yield rice in the soil different depth for root growth and root vigor, per plant root vigor, root-shoot ratio was studied, the results showed that, the whole growth period, the root vigor order from strong to the weak was ‘Yuexiangzhan’, ‘Guinongzhan’, ‘Tianyou 998’, ‘Zhongzao 22’. The root vigor was lower growth > middle > upper in the early period, later period instead. The root distribution mainly concentrates on top, followed by the middle, and the lower minimum. ‘Tianyou998’ and ‘Guinongzhan’ had high root-shoot ratio, ‘Tianyou998’ root activity of population is strong in the whole growth period, ‘Yuexiangzhan’ root activity of population was advantage in the early middle period, ‘Guinongzhan’ the root vigor of population was advantage in later period. For the test of four varieties of super-yield rice (combination) of the root distribution mainly concentrated in the upper layer (0-8 cm) of the total root biomass of 60% or more, to plant root activity as a measure to better reflect plant of the whole root and shoot growth and vitality of the close relationship.