南亚热带杉木林改造不同树种配置模式的土壤质量评价

发布时间：2018-06-07 15:20

本文选题：土壤质量 + 综合评价　；参考：《中国水土保持科学》2017年03期

【摘要】：为探明不同树种配置对杉木纯林改造中土壤质量的影响,以南亚热带地区不同树种配置、林龄11~12 a的杉阔混交林为研究对象,以林龄13 a杉木纯林的土壤化学性质为对照,比较不同林分0~25 cm土层的土壤理化性质以及微生物生物量碳和氮,并基于主成分分析,综合评价不同杉阔混交林的土壤质量。结果表明:混交林土壤p H值为4.15~4.71,速效氮和速效磷质量分数分别为81.4~152.8和0.93~2.39 mg/kg,杉木林p H值为4.06,速效氮和速效磷质量分数分别为30.8和0.76 mg/kg,前者比后者有不同程度的升高;全磷质量分数除林分C(0.45g/kg)较高外,其余混交林(0.14~0.32 g/kg)均小于杉木林(0.34 g/kg);其他指标在不同林分间无一致变化规律。杉阔混交林的土壤质量指数介于0.25~0.64之间;其中,米老排+枫香+香樟+盆架子+杉木、米老排+香樟+阴香+火力楠+杉木、米老排+枫香+香樟+尖叶杜英+杉木3种树种配置的土壤质量指数均大于0.6,表现出较强的土壤改良能力;米老排和香樟树种的土壤改良能力较强,而海南蒲桃和大叶紫薇较差。3种土壤质量指数较大的树种配置,可在我国南亚热带地区的杉木纯林改造中推广应用。
[Abstract]:In order to investigate the effect of different tree species allocation on soil quality of pure Chinese fir forest, the soil chemical properties of pure Chinese fir forest at 13 years old were studied by using different tree species allocation and 1112 years old fir and broad-leaved mixed forest in the subtropical region as the research object, and the soil chemical properties of the pure Chinese fir forest at the age of 13 years were compared. The soil physical and chemical properties, microbial biomass carbon and nitrogen of different stands were compared. Based on principal component analysis, the soil quality of different fir and broad-leaved mixed forest was evaluated. The results showed that the soil pH value of mixed forest was 4.15 ~ 4.71, the mass fraction of available nitrogen and available phosphorus were 81.4 ~ 152.8 and 0.93N ~ (2.39) mg / kg respectively, the pH value of Chinese fir forest was 4.06, the mass fraction of available nitrogen and available phosphorus were 30.8 and 0.76 mg / kg respectively, the former was higher than the latter to some extent. The total phosphorus content was 0.34 g / kg lower than that in the Chinese fir forest, except that the content of total phosphorus was 0.45 g / kg in the stands, and there was no consistent change of other indexes among the different stands in the other mixed forest stands (0.14 ~ 0.32 g 路kg ~ (-1 / kg), and the total phosphorus content was 0.34 g / kg ~ (-1) in the Chinese fir forest. The soil quality index of Chinese fir and broad-leaved mixed forest was between 0.25 and 0.64. Among them, the old row of rice, maple and camphor stand of Chinese fir, and the old row of rice of Chinese fir, The soil quality index of the three tree species were all greater than 0.6, which showed strong ability of soil improvement, and the soil quality index of Laopai and camphor trees was stronger than that of Chinese fir tree, and the soil quality index of the three tree species was higher than 0.6, and the soil quality index of the three tree species was higher than 0.6. However, the tree species with lower soil quality index and lower soil quality index could be widely used in the transformation of pure Chinese fir forest in the subtropical region of China.
【作者单位】：广东省森林培育与保护利用重点实验室广东省林业科学研究院;广东省佛山市云勇生态林养护中心;
【基金】：广东省林业科技创新专项项目“广东省典型区域碳汇林结构优化关键技术研究与示范”(2015KJCX027);广东省林业科技创新专项项目“新丰江饮用水源地水源林构建关键技术研究与示范”(2015KJCX029)
【分类号】：S714

【相似文献】