沿海贫瘠地马尾松低效林改造成马占相思与木荷混交林效果分析

Study on Replant of Pinus Massoniana Low-benefit Forest into Acacia Mangium and Schima Superba Forest in Coastal Barren Land

对闽南沿海贫瘠地马尾松低效林进行改种成马占相思和木荷混交林试验,通过对8年生混交林生长、土壤肥力、林下枯枝落叶以及林相状况等调查分析,结果表明:改造后的混交林中马占相思和木荷长势都很好,林分保存率达90%,郁闭度达85%,混交林中马占相思平均树高、胸径分别达9.81 m和8.53 cm,木荷树高、胸径分别达7.42 m、6.56 cm。而未改造的马尾松低效林26年生平均树高5.25 m、平均胸径4.91 cm,郁闭度45%;混交林土壤肥力、林分小气候以及林相状况得到了较大程度的改善,改造效果较好,值得推广。

Experiment on replant of Pinus Massoniana low-benefit forest into Acacia mangium and schima superba forest in southern coastal barren land in Fujian was carried out in this paper through analysis on growth, soil fertility, dry branches and fallen leaves, and forest conditions of eight-year-old mixed forest. Results showed positive growth of Acacia mangium and schima superba with survival rate of 90% and canopy density 85%. The average height and DBH of Acacia mangium was 9.81 m and 8.53 cm respectively, and that of schima superba was 7.42 m and 6.56 cm, compared with average height,DBH, and canopy density of Pinus Massoniana low-benefit forest 5.25 m, 4.91 cm, and 45%. Soil fertility, forest microclimate and forest conditions of mixed forest showed remarkable improvement, and thus it is worth popularizing.