福建柏木荷混交造林土壤肥力研究

Study of Soil Fertility of Mixed Forest of Fokienia hodginsii and Schima superba

在杉木采伐迹地营造福建柏木荷混交林、纯林,经过十几年的经营管理,对不同类型的林分生长量、林内环境、土壤肥力等进行了调查对比,结果表明:12年生的福建柏木荷混交林的林分生长量,比福建柏、木荷纯林的林分生长量,平均树高分别大10.58%、12.50%,平均胸径分别粗15.28%、20.68%,平均枝下高分别大4.21%、17.86%,平均单株材积分别大48.57%、67.74%,平均蓄积量分别大14.01%、37.74%。地表层枯枝落叶物平均分别高0.70～1.00cm,增厚25.93%～70.00%。土壤肥力N、P、K养分,平均分别提高2.94%、1.94%,4.55%、2.99%,2.98%、2.47%。

Fokienia hodginsii, Schima superba and the mixed forest were built respectively in logging slash of cunninghamia lanceolata. After 12 years of management, this article carries out the comparative analysis of the growth increment, inner forest environment and soil fertility of different forest stands. The results indicate that the average height, dbh, under branch height, individual volume, and stock volume of mixed forest are reapectively higher than those of Fokienia hodginsii and Schima superba, which account for 10.58% and 12.50%, 15.28% and 20.68%, 4.21% and 17.86%, 48.57% and 67.74~/00, 20.75% and 30.61%,14.01% and 37.74%. Besides, the average thickness of the litter on the surface of the mixed forest is 0.70 to 1.00 cm thicker than that of Fokienia hodginsii and Schima superba, increased by 25. 93% to 70.00%, and the soil nutrients N, P, K fertility are increased by 2.94% and 1.94%, 4.55% and 2.99%, 2.98% and 2.47% respectively.