广东沙质海岸防护林前缘植草研究

利用营养坯，以扦插方式在苗圃先行育苗，待形成根系及恢复生长后，再移植至海滩，是营造沙质海岸防护林植草带的有效方法，可以获得９０％以上的成活率。单叶蔓荆子、蔓茎栓果菊和卤地菊是适于南方沙质海滩迎风方向种植的草种。它们具生长快，易生出不定根和萌生新单株，耐淹埋等沙生植物特性。移植１ａ后的盖度分别达到１００％、５３％和４３％（种植规格为１ｍ×１ｍ）。４～８月为生长最迅速时期，平均相对生长速率分别为０．６３５，０．５３５和０．３５７ｇ／（ｇ月）。因此，３～４月是最适移植的季节。

Study on Plantation of Grass Outer Fringe on Sandy Coast Shelter-forest in Guangdong Province

Establishing grass belt outer fringe on sandy coast shelter forest is an effective method because nursery stocks were propagated by cuttings or vegetative offsprings in nutritive pot, and then transplanted at outer fringe on sandy coast shelter forest. When the transplanted stocks have recovered their growth and formed root system. The transplanting success can be attained. Vitex rotundifolia, Launaea sarmentosa and Wedelia prostrata are very suitabe to be estabblished for the grass belt outer fringe on sandy coast shelter forest. They are characterized by quick growth, easy striking of adventitious root and forming ramets. For a year after transplahtation, the coverage can reach 100%, 53% and 43% respectively, and the RGR on basis of present biomass is 0.653, 0.535 and 0.357 g/g.month, therefor the period from March to April is the best season for transplantation in South China.