| 摘要: |
| 对 2 a 生单种无瓣海桑（Sonneratia apetala）、单种秋茄（Kandelia obvata）和混种无瓣海桑—
秋茄（1:1）人工林下土壤理化性质、微生物群落结构、酶活性进行了研究。结果表明，单种无瓣海桑林
下土壤 pH 值最低（5.61±0.08），土壤有机质、总磷、总氮含量在 3 个群落间均无显著差异；单种无瓣
海桑林下土壤蛋白酶、芳基硫酸酯酶和磷酸酶的活性高于其它两种人工林，脲酶、纤维素酶和脱氢酶活
性以混种林下最高（分别为 190.20±28.49， 19.04±4.77 和 93.21±14.10 μg · g-1 · h-1），β- 葡萄糖苷酶和
芳基硫酸酯酶活性在 3 种人工林下差异不显著；单种无瓣海桑林下土壤中各种脂肪酸含量较高，混种林
下土壤的脂肪酸含量最低；典型相关分析表明，蛋白酶活性和土壤 pH、总氮含量呈显著负相关（P ＜
0.01），磷酸酶活性与总磷含量呈显著正相关（P ＜ 0.01）。 |
| 关键词: 无瓣海桑 秋茄 土壤微生物 磷脂脂肪酸 酶活性 |
| DOI： |
| 分类号: |
| 基金项目: |
|
| Study on Soil Microbial Community Characteristics of Sonneratia apetala and Kandelia obvata Plantations in Shenzhen Bay |
|
Huan DU
|
|
Guangdong Neilingding Futian National Nature Reserve
|
| Abstract: |
| The present study examined the relationships between soil physical and chemical properties,
soil microbial community structure (expressed by phospholipid fatty acids, PLFAs) and enzymatic activities
in three types of 2-year-old plantations, which were monoculture Sonneratia apetala, monoculture Kandelia
obvata and mixed plantations (with 50% of S.apetala and 50% of K.obvata) in Futian National Nature Reserve,
Shenzhen Bay. Soil in mono-S.apetala was most acidic (pH-value 5.61±0.08), while the organic matter
content, total phosphorus content (P) and the total nitrogen (N) content showed no significant difference among
three plantations. Soil in the mono-S.apetala showed higher activities of protease, arylsulphatase, phosphatase
among three plantations, and the mixed plantations had highest urease, cellulose, and dehydrogenase activities
which were 190.20±28.49， 19.04±4.77 and 93.21±14.10 μg · g-1 · h-1, respectively. However, no significant
difference was found in the activities of β-glucosidase and arylsulphatase among three plantations. The diagnostic
PLFAs were the most abundant in the mono-S.apetala, but the least in the mixed plantation. The canonical correlation analysis (CCA) revealed that protease activities were significantly negatively correlated to pH-value
and the content of total N, while the phosphatase showed significant positive correlation with the content of total
P. |
| Key words: Sonneratia apetala Kandelia obvata soil microorganism phospholipid fatty acid enzymatic activity |
