2025年04月13日 星期日

广西师范大学学报（自然科学版） ›› 2025, Vol. 43 ›› Issue (1): 150-160.doi: 10.16088/j.issn.1001-6600.2024062801

• “生态保护与资源可持续利用”专辑 • 上一篇    下一篇

马尾松补植木荷对土壤微生物生物量碳氮的动态影响

彭素琴1,2, 刘郁林3, 毛瑢4, 刘苑秋4*, 樊乙萱5, 周玉姗1,2, 杨琪1,2   

  1. 1.赣南师范大学 地理与环境工程学院,江西 赣州 341000;
    2.江西省竹基新材料与物质转化工程研究中心(赣南师范大学),江西 赣州 341000;
    3.江西环境工程职业学院 林学院,江西 赣州341000;
    4.江西农业大学 林学院,江西 南昌 330045;
    5.湖北大学 资源环境学院,湖北 武汉 430062
  • 收稿日期:2024-06-28 修回日期:2024-07-29 出版日期:2025-01-05 发布日期:2025-02-07
  • 通讯作者: 刘苑秋(1963—),女,江西寻乌人,江西农业大学教授,博士。E-mail:liuyq404@163.com
  • 基金资助:
    国家自然科学基金(31860236);赣鄱英才555工程项目;江西省自然科学基金(20202BABL203040)

Dynamic Effects of Pinus massoniana Replanted with Broad-leaved Trees of Schima superb on Soil Microbial Biomass Carbon and Nitrogen

PENG Suqin1,2, LIU Yulin3, MAO Rong4, LIU Yuqiu4*, FAN Yixuan5, ZHOU Yushan1,2, YANG Qi1,2   

  1. 1. School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou Jiangxi 341000, China;
    2. Engineering Research Center of Bamboo-base New Materials and Material Transformation in Jiangxi, Gannan Normal University, Ganzhou Jiangxi 341000, China;
    3. College of Forestry, Jiangxi Environmental Engineering Vocational College, Ganzhou Jiangxi 341002, China;
    4. College of Forestry, Jiangxi Agricultural University, Nanchang Jiangxi 330045, China;
    5. College of Resources and Environment, Hubei University, Wuhan Hubei 430062, China
  • Received:2024-06-28 Revised:2024-07-29 Online:2025-01-05 Published:2025-02-07

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摘要： 土壤微生物生物量对研究森林土壤养分状况和碳氮循环有重要意义,为探明退化红壤区不同林分结构下土壤微生物生物量碳氮分布特征和季节、土层变化规律,本研究以土壤微生物生物量碳(MBC)和土壤微生物生物量氮(MBN)含量为测定指标,以1991年营造的马尾松Pinus massoniana林和木荷Schima superb林为对照,分析马尾松林补植木荷对不同土层MBC、MBN含量的影响及其季节变化规律。结果表明:1)木荷林、马尾松木荷混交林土壤MBC含量显著高于马尾松林(P<0.05),马尾松林补植阔叶树木荷后显著提升了土壤MBC含量(P<0.05)。3种林分类型表层土壤MBC含量均显著高于深层土壤(P<0.05),季节之间有显著差异(P<0.05),MBC含量在春季最高,冬季最低。2)木荷林、马尾松木荷混交林土壤MBN含量显著高于马尾松林(P<0.05),马尾松林补植阔叶树木荷显著提高了土壤MBN含量(P<0.05)。3种林分土壤MBN含量均随着土层的加深而减少,季节对土壤MBN有显著影响(P<0.05),MBN含量在春季最高,夏季最低。3)土壤微生物生物量碳、氮之间存在极显著正相关性(P<0.01),土壤MBC含量与凋落物性质无显著相关性(P>0.05);土壤MBN含量与凋落物氮含量显著正相关(P<0.05),与凋落物碳含量、凋落物C/N极显著负相关(P<0.01)。研究结果表明马尾松林补植木荷显著提高了土壤微生物生物量碳氮(P<0.05),有利于土壤肥力的提升。

关键词: 退化红壤, 马尾松, 林分结构, 土壤微生物生物量, 碳氮比, 季节变化

Abstract: The study of soil microbial biomass carbon and nitrogen is of great significance for the study of the forest soil nutrient status and carbon and nitrogen cycle, in order to find out the distribution characteristics and seasonal and soil layer change rules of forest soil microbial biomass carbon and nitrogen under different stand structure in degraded red soil region. The contents of soil microbial biomass carbon and nitrogen were taken as the measurement indexes,the soil of the Pinus massoniana pure plantation and Schima superb pure plantation planted in 1991 were taken as the control, and the effects of the P. massoniana replanted with broad-leaved treest of S. superb on soil microbial biomass carbon and nitrogen contents in different soil layers and their seasonal laws were analyzed. The results showed as follows: (1) Soil MBC content of S. superb plantation and the mixed plantation of P. massoniana and S. superb plantation was significantly higher than that of P. massoniana plantation (P<0.05), the content of soil MBC was significantly increased after the P. massoniana forest was thinned and replanted with broad-leaved trees of S. superb(P<0.05) and the soil MBC of all plantations decreased with the depth of soil layer. Seasons had a significant effect on soil MBC (P<0.05), and the soil MBC content of the three plantations was almost the highest in spring and the lowest in winter; (2) Soil MBN content of S. superb plantation and the mixed plantation of P. massoniana and S. superb plantation was significantly higher than that of P. massoniana plantation (P<0.05), the content of soil MBN was significantly increased after the P. massoniana forest was thinned and replanted with broad-leaved trees of S. superb (P<0.05). and the soil MBN of all plantations decreased with the depth of soil layer. Seasons had a significant effect on soil MBN, and the soil MBN content of the three plantations was almost the highest in spring and the lowest in summer (P<0.05); (3)There was significant positive correlation between soil MBC and soil MBN (P<0.01), the soil MBN was significantly positively correlated with litter N (P<0.05), and negatively correlated with litter C and litter C/N (P<0.01). The results showed that the content of soil MBC and MBN was significantly increased after the P. Massoniana plantation was thinned and replanted with broad-leaved trees of S. superb (P<0.05), which was more conducive to the improvement of soil fertility.

Key words: degraded red soil, Pinus massoniana, stand structure, soil microbial biomass, C/N ratio, seasonal variation

中图分类号:  S714.3

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