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[目的]研究海南3种乡土树种肖槿(Thespesia lampas)、海棠果(Calophyllum inophyllum)、莲叶桐(Hernandia sonora)在海岸木麻黄林下的生长状况及其环境因子的关系。[方法]定植肖槿、海棠果、莲叶桐植株的滨海沙土进行了添加木屑、蔗渣及空白对照处理,分析定植1年后3种乡土树种的生长状况。[结果]1年的生长期后,各树种生长指标表现为存活率肖槿>莲叶桐>海棠果、基径净增长量莲叶桐>肖槿>海棠果、株高净增长量肖槿>海棠果>莲叶桐。肖槿和海棠果存活率差异极显著,海棠果和莲叶桐的存活率差异也达到显著,而肖槿和莲叶桐的存活率差异不显著;肖槿、海棠果、莲叶桐株高1年净增长量均达到极显著差异,基径净增长量只有肖槿和海棠果的差异显著。②不同土壤处理下,添加木屑、蔗渣处理的肖槿、海棠果、莲叶桐存活率大于对照处理,且添加木屑与添加蔗渣的肖槿存活率与对照处理间的差异均达到显著水平,而添加木屑和蔗渣这2种处理间的差异不显著。③3种苗木生长指标与环境因子都有一定的相关性(|r|>0.3),其中肖槿存活率与土壤pH值、土壤水分相关性较高,基径、株高与土壤pH值、土壤温度有一定的相关性;海棠果存活率与土壤pH值、土壤温度、光照强度相关性均较高,基径、株高都与土壤温度有一定的相关性;莲叶桐存活率与土壤盐度、土壤温度相关性均较高,基径、株高与都与土壤温度有一定的相关性。肖槿、海棠果、莲叶桐的基径与株高的相关性均较高(r>0.5),且都达到显著水平。[结论]在木麻黄林下1年生长期内,肖槿苗木生长状况最好,是与木麻黄混交最有潜力的树种。
[Objective] The research aimed to study the relationship between the growth status and environmental factors of three native species, Thespesia lampas, Calophyllum inophyllum and Hernandia sonora in Hainan Island. [Method] Coastal sandy soil of Xiaoying, Begonia camaldulensis and Ulmus pumila was planted with the addition of sawdust, bagasse and blank control. The growth of three native tree species after one year of planting was analyzed. [Result] After one year of growth period, the growth indexes of all species showed the survival rate of Shaobishan> Lotus> Begonia cauliflower, net increment of base diameter. > Begonia fruit> lotus leaf Tong. There was significant difference in the survival rate between Shaoxing and Begonia, and the differences in the survival rates between Begonia cassia and Althea were also significant, while there was no significant difference in the survival rates of Shaoxing and Tongyengtong. 1-year net increase reached a significant difference, the net increase of base diameter only Shabelberry and Begonia fruit significant difference. ② Under the different soil treatments, the survival rates of Xiaoying, Begonia camalumi and Ulmus pumila were higher than those of the control treatments with addition of sawdust and bagasse, and the difference between the survival rate of Xiaojin There was no significant difference between the two treatments with the addition of sawdust and bagasse. The growth index of three kinds of seedlings had some correlation with environmental factors (| r |> 0.3), among which, the survival rate of Xiao hibiscus had a higher correlation with soil pH value and soil moisture, the base diameter, plant height and soil pH value, soil The correlation between the survival rate of cauliflower and soil pH, soil temperature, light intensity were high, base diameter, plant height and soil temperature have a certain correlation; Degree and soil temperature were higher than those of soil temperature. Base diameter, plant height and soil temperature had some correlations. The correlations between base diameter and plant height of Xiaoying, Caulis Carambola, and Eupatorium adenophorum were all higher (r> 0.5) and both reached significant levels. [Conclusion] The growth of seedlings of Xiaoji was the best during the one-year growth period of Casuarina equisetifolia. It was the most potential tree species for mixed with Casuarina equisetifolia.