The growth process of Pinus massoniana under three improving and control patterns of grass-planting(pattern Ⅰ)

arbor mixed with shrub(pattern Ⅱ) and arbors-mixed(pattern Ⅲ) in severely eroded red soil at Hetian town

Changting county

Fujian province are studied. The results showed that compared with control plot

the growth of Pinus massoniana developed in plots where having taken some measures for soil and water conservation. On initial stage

three patterns promoted tree growth

and the effect of pattern Ⅲ was the best

while that of patternⅠwas the poorest. With time going on and fertility exhausted

the growth of Pinus massoniana declined again

and the duration of the effect was the longest for pattern Ⅱ

whereas the shortest for pattern Ⅰ. It is clear that combination of mechanical and fertility measures are necessary for the control of degraded eroded soil

and how to regulate them on late stage to accelerate the restoration of ecosystem remains a critical question for future research.