樟树人工林对湘东退化红壤性质及微生物碳源利用的影响

张杰; 张海燕; 赵姣; 金晓芳; 龚磊; 李凤; 金志农

doi:10.13870/j.cnki.stbcxb.2018.06.048

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樟树人工林对湘东退化红壤性质及微生物碳源利用的影响

更新时间：2025-03-12

- 樟树人工林对湘东退化红壤性质及微生物碳源利用的影响
- Effects of
- 水土保持学报 2018年32卷第6期页码：333-339
- 作者机构：
  
  南昌工程学院水利与生态工程学院, 江西省樟树繁育与开发利用工程研究中心,南昌,330099
- 作者简介：
  
  [ "张杰(1983-),女,博士,讲师,主要从事红壤生态学与水土保持研究。E-mail:tg_zhangjie@126.com" ]
- 基金信息：
  
  江西省教育厅科技项目（GJJ151120）国家自然科学基金项目（31660599）
- DOI：10.13870/j.cnki.stbcxb.2018.06.048
  中图分类号： S718.8
- 纸质出版：2018
- 稿件说明：
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张杰, 张海燕, 赵姣, 等. 樟树人工林对湘东退化红壤性质及微生物碳源利用的影响[J]. 水土保持学报, 2018,32(6):333-339.

ZHANG Jie, ZHANG Haiyan, ZHAO Jiao, et al. Effects of[J]. 2018, 32(6): 333-339.
张杰, 张海燕, 赵姣, 等. 樟树人工林对湘东退化红壤性质及微生物碳源利用的影响[J]. 水土保持学报, 2018,32(6):333-339. DOI： 10.13870/j.cnki.stbcxb.2018.06.048.

ZHANG Jie, ZHANG Haiyan, ZHAO Jiao, et al. Effects of[J]. 2018, 32(6): 333-339. DOI： 10.13870/j.cnki.stbcxb.2018.06.048.

摘要

通过对湘东红壤丘陵区樟树（Cinnamomum camphora）人工林林下与林间土壤进行配对采样与分析，研究樟树人工林对退化红壤性质及微生物碳源利用的影响。结果表明：与林间土壤相比，林下土壤的pH增加0.95个单位，全磷、全钾和含水量分别提高14.8%，16.8%和45.6%，容重降低8.1%，均达到显著水平。樟树人工林显著增加林下土壤微生物的平均颜色变化率（average well color development，AWCD），林间土壤微生物对碳水化合物、氨基酸、羧酸、聚合物和酚酸类碳源的利用强度依次仅相当于林下土壤微生物的27.6%，19.2%，23.4%，47.1%和3.5%，但二者对胺类碳源的利用没有明显变化。樟树人工林显著增加林下土壤微生物的丰富度指数、多样性指数、优势度指数和均匀度指数。主成分分析发现，樟树人工林改变土壤微生物的碳源利用模式；相关性分析表明，樟林恢复后土壤理化性质的改善是造成微生物碳源利用能力和多样性指数提升的主要原因，而土壤pH是其中的首要驱动因素。综上，樟树人工林有助于提高湘东退化红壤的微生物生态功能，樟树是进行退化红壤生态修复和重建的适宜树种。

Abstract

In order to study the effects of Cinnamomum camphora plantations on properties of degraded red soil and utilization of microbial carbon sources in eastern Hu'nan

forest soil and non-forest soil samples were paired sampled and analyzed. The results showed that the pH in forest soil was significantly increased by 0.95 units compared with non-forest soil

and the total phosphorus

total potassium and water contents were significantly increased by 14.8%

16.8% and 45.6%

respectively. But the soil bulk density was significantly decreased by 8.1%. The average well color development (AWCD) of soil microorganisms was significantly increased by long-term Cinnamomum camphora restoration. Furthermore

the microbial metabolic intensities of carbohydrates

amino acids

carboxylic acids

polymers and phenolic compounds in non-forest soil were only 27.6%

19.2%

23.4%

47.1% and 3.5% of those in forest soil

respectively. In addition

soil microbial functional diversity indexes were significantly increased by long-term Cinnamomum camphora restoration. Principal component analysis (PCA) showed that Cinnamomum camphora plantations changed the carbon sources utilization pattern of soil microbial community. Correlation analysis showed that the improved soil physical and chemical properties after Cinnamomum camphora restoration were reasons for the improvement of microbial carbon sources utilization capacity and functional diversity indexes

and among which

soil pH was the primary driving factor. In conclusion

Cinnamomum camphora plantations could improve the microbial ecological function of degraded red soil in eastern Hu'nan

and Cinnamomum camphora is a suitable tree species for ecological restoration and reconstruction of degraded red soil.

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