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为了探讨海南省低质低效林高效栽培技术,为海南省低质低效林改造奠定基础,采用样方调查及取样分析方法,研究了海南省国营通什林场(109o31’E,18o46’N)低质低效加勒比松次生林林下植被物种多样性、生物量及其土壤理化性质,并探讨了它们之间的相关性。结果表明,灌木层植物丰富度、多样性指数均高于草本层,但均匀度指数却低于草本层;林下植被生物量总体表现为灌木层大于草本层;土壤全N的含量在1.15～1.78g/kg之间,0～20cm土层的全N含量与20～40cm土层及40～60cm土层间差异性显著。40～60cm土层的有效P含量与其余2层呈显著差异。0～20cm土层速效K含量与其余2层差异性显著。从试验结果可以看出,海南省低质低效林土壤养分较为贫瘠。林下物种多样性指数与土壤全N、全P、全K、速效K含量之间具有显著正相关,但与容重、pH相关性并不显著。生物量与土壤的理化性状相关性不大。
In order to explore the efficient cultivation techniques of low-quality and low-efficiency forests in Hainan Province and lay the foundation for the transformation of low-quality and low-efficiency forests in Hainan Province, this paper studied the situation of Hainan Province’s state-owned Tonglin Forest Farm (109o31’E, 18o46’N The species diversity, biomass and soil physical and chemical properties of understory vegetation in low quality and inefficient subcarpine pine secondary forests, and the correlation between them were discussed. The results showed that the plant richness and diversity index of shrub layer were higher than that of the herb layer, but the evenness index was lower than that of the herb layer. The biomass of the understory vegetation was generally shrub layer larger than the herb layer. The content of soil total N was between 1.15 ~ The difference of total N content in 0-20cm soil layer and 1.78g / kg soil layer was significant between 20-40cm soil layer and 40-60cm soil layer. The effective P content of 40 ~ 60cm soil layer was significantly different from the other two layers. The available K content in 0 ~ 20cm soil layer was significantly different from the other two layers. It can be seen from the test results that the nutrients of low-quality and low-efficiency forests in Hainan Province are relatively poor. Undergrowth species diversity index had significant positive correlation with total N, total P, total K, available K, but not significant with bulk density and pH. The correlation between biomass and physical and chemical properties of soil is not significant.