桂北罗汉果组培苗水田种植的理论依据及生态学意义

罗汉果在长期的个体发育过程中形成了对环境条件有一定要求，传统的罗汉果在天然林间伐的空地种植有许多不足，容易引起生态问题。最近几年随罗汉果组培苗在水田种植的成功推广，带动果农走向了致富之路。就生态保护和发展罗汉果经济而言，罗汉果下山转移到水田种植是对山区生态系统的协调保护和发展当地经济的好办法，原果地废弃后三到五年次生林数量显著增加，林下植物生长较快，土壤含水量及有机质有所提高。水土流失减少，滑坡危险系数减少，在罗汉果种植区有很好的可行性。

The Theoretical Basis and Ecological Significance of Cultivating Siraitia Grosvenorii Tissues Seedlings in Paddy in Northern Guangxi

The siraitia grosvenorii needs a particular environment to reach its full growth, while there still remain some disadvantages like causing ecological problems in its traditional culture in vacant place of woods. In recent years, farmers have had the benefit of a successful promotion of cultivating siraitia grosvenorii tissues seed- lings in paddy. Considering the ecological protection and the economic development of siraitia grosvenorii, cultiva- ting the plant in paddy instead of in woods is indeed a good way to protect the mountain ecosystem as well as promoting the local economy. Within three to five years, there has been an obvious rise in the number of the secondary - growing trees in the deserted ground formerly used for siraitia grosvenorii, and the nearby plants grow quickly since soil moisture and organic matter have been improved. Besides, both soil erosion and landslide have decreased as a result. Namely, the new way is well practicable in siraitia grosvenorii planting areas.