There is a large area of low-quality and benefit forest in middle-mountain of the upper reaches of Minjiang river.High density root-sprouts which are not obvious stem formed shaded condition where there are low light and dry soil of forests.These low-benefit and quality forests are improved by root-sprout regeneration technique for 2 years.Soil ecological functions are ameliorated significantly.Soil bulk density of improved woodland decreased 9.6%～32.6% than that of control.Soil total porosity of improved woodland was also significantly ameliorated.Soil total porosity and capillary porosity of topsoil in improved woodland increased 30.9% and 31.5% than that of control

respectively.Ratio of capillary porosity and non-capillary porosity became even more rational.As a result of melioration of soil porosity condition

the capacity of water-holding was also ameliorated.The maximal

capillary capacity of water-holding and natural moisture content in improved woodland increased 87.5%

(94.6)% and 64.0% than that of control

respectively.The non-capillary capacity of waterholding also increased 72.3% after 2 years.Root-sprout regeneration technique accelerated material circulation

root activity and plant growth and ameliorated soil ecological function through the control of plant structure and function.Root-sprout regeneration technique that increased the capacity of water-holding is a good technique

and it should be popularized in middle-mountain of the upper reaches of Minjiang river.