In order to conduct species comparison and eco-benefit analysis in revegetation

some fixed plots with different treatments of revegetation were set up on different types of land in the headstream area of Pearl River. The result of four-year study showed as follows (1) Among the six species studied

the tree height growth of Pinus yunnanensis was the lowest

and that of the Alnus neplanensis was the fastest. The tree height growths of Sabina chinensis

Cupressus torulosa

Cryptomeria japonica

Alnus ferdinandi-coburgii were 2.8

2.5

2.3 and 1.7 times of that of Pinus yunnanensis

respectively. The tested species

in terms of DBH

ranked in the descent order of Alnus neplanensis

Sabina chinensis

Cupressus torulosa

Cryptomeria japonica

Alnus ferdinandi-coburgii and Pinus yunnanensis. (2) Land types ranked in the descent Shannon Wiener index were in turn rehabilitated land at shady slope

grass land and bare land

and degraded forest land; land types ranked in the descent evenness index were in turn rehabilitated land at shady slope

arable land at sunny slope

grass land and bare land

and degraded forest land. (3) Soil bulk densities of all the land types decreased

and capillary porosities obviously increased compared with those in 2001

which implied that soil physical structure was significantly increased

and the condition of soil compaction was improved greatly. (4) The average soil erosion modulus for the experimental region decreased to 1 087 t/(km2·a)

and it decreased by 38.48 %. The area of soil and water loss decreased from 188.27 hm2 to 104.83 hm2

decreasing by 44.32 %.