| 引用本文: | 熊 潇, 苏仕权, 童 慧, 祝鑫宇, 罗舟宇,
王 一, 郑丹妮, 尤业明, 黄雪蔓.马尾松人工林引入阔叶树种异龄混交改造对土壤生物有效性磷组分的影响[J].广西植物,2026,46(7):1134-1145.[点击复制] |
| XIONG Xiao, SU Shiquan, TONG Hui, ZHU Xinyu, LUO Zhouyu,
WANG Yi, ZHENG Danni, YOU Yeming, HUANG Xueman.Effects of introducing broadleaf tree species for uneven-aged mixed transformation on soil bioavailable phosphorus fractions in Pinus massoniana plantation[J].Guihaia,2026,46(7):1134-1145.[点击复制] |
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| 马尾松人工林引入阔叶树种异龄混交改造对土壤生物有效性磷组分的影响 |
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熊 潇1, 苏仕权1, 童 慧1, 祝鑫宇2,3, 罗舟宇1,
王 一4, 郑丹妮1, 尤业明1,3, 黄雪蔓1,3*
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1. 广西大学 林学院, 广西森林生态与保育重点实验室, 广西高校亚热带人工林培育与利用重点实验室, 南宁 530004;2. 中国林业
科学研究院热带林业实验中心, 广西 凭祥 532600;3. 广西友谊关森林生态系统定位观测研究站, 崇左凭祥友谊关森林生态系统
广西野外科学观测研究站, 广西 凭祥 532600;4. 国际竹藤中心 竹藤科学与技术重点实验室, 北京 100102
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| 摘要: |
| 土壤磷(P)是制约我国亚热带人工林生产力的关键因子, 而长期的单一化马尾松人工林经营导致土壤P循环失衡等问题突出。为探究马尾松人工纯林引入阔叶树种异龄混交改造对土壤生物有效性磷(bioavailable P, Bio-P)组分的动态特征及主要影响因素,该研究以南亚热带马尾松人工林为对象, 基于Bio-P分级方法, 对比分析了马尾松-红锥混交林(MP)、马尾松-红锥/大叶栎/格木/香梓楠多树种混交林(MMP)及未改造马尾松人工纯林(PP,对照)的腐殖质层和淋溶层的Bio-P组分(酶磷、柠檬酸磷、氯化钙磷、盐酸磷)动态特征, 并结合相关土壤理化性质、微生物生物量及酶活性等指标, 探明Bio-P的主要影响因素。结果表明:(1)相对于PP, MP腐殖质层的柠檬酸磷和盐酸磷分别显著增加了31.50%和39.78%(P<0.05), MMP的盐酸磷显著增加了59.77%(P<0.05); MP和MMP淋溶层的酶磷分别显著增加了39.00%和91.13%(P<0.05),氯化钙磷含量分别显著增加了8.40%和8.90%(P<0.05)。(2)相对于PP, MMP腐殖质层的有机碳、铵态氮、速效磷和微生物生物量磷含量显著降低(P<0.05),而MP和MMP淋溶层的有机碳、全氮、全磷、速效磷及微生物生物量碳、氮和磷均显著增加(P<0.05)。(3)相对于PP, MMP腐殖质层的碳、氮、磷循环相关的酶活性分别显著降低了41.42%、34.22%、30.23%(P<0.05), 而MP淋溶层的上述酶活性分别显著增加了61.17%、157.98%、31.70%(P<0.05),以及MMP淋溶层的上述酶活性分别显著增加了40.91%、238.66%、37.93%(P<0.05)。(4)硝态氮和速效磷是影响腐殖质层Bio-P组分的主要调控因子,而全磷和酶碳氮比是影响淋溶层Bio-P组分的主要驱动因子。综上认为, 马尾松人工林引入阔叶树种混交改造有利于土壤P的储存和供应, 该研究结果为提高南亚热带人工林土壤P有效性的树种选择和经营管理策略提供了重要的科学依据。 |
| 关键词: 马尾松人工林, 异龄混交改造, 腐殖质层, 土壤酶活性, 生物有效性磷 |
| DOI：10.11931/guihaia.gxzw202507035 |
| 分类号:Q948 |
| 文章编号:1000-3142(2026)07-1134-12 |
| 基金项目:国家自然科学基金项目(32171755, 32471727); 广西自然科学基金项目(2025GXNSFAA069288); 自治区级大学生创新创业训练计划项目(S202410593434); 崇左凭祥友谊关森林生态系统广西野外科学观测研究站科研能力建设项目(桂科AD25069098)。 |
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| Effects of introducing broadleaf tree species for uneven-aged mixed transformation on soil bioavailable phosphorus fractions in Pinus massoniana plantation |
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XIONG Xiao1, SU Shiquan1, TONG Hui1, ZHU Xinyu2,3, LUO Zhouyu1,
WANG Yi4, ZHENG Danni1, YOU Yeming1,3, HUANG Xueman1,3*
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1. Guangxi Key Laboratory of Forest Ecology and Conservation, Guangxi Colleges and Universities Key Laboratory for Cultivation and Utilization
of Subtropical Forest Plantation, College of Forestry, Guangxi University, Nanning 530004, China;2. China Experiment Center of Tropical
Forestry, Chinese Academy of Forestry, Pingxiang 532600, Guangxi, China;3. Guangxi Youyiguan Forest Ecosystem Observation and Research
Station, Youyiguan Forest Ecosystem Observation and Research Station of Guangxi, Pingxiang 532600, Guangxi, China;4. International
Bamboo and Rattan Centre, Key Laboratory of Bamboo and Rattan Science and Technology, Beijing 100102, China
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| Abstract: |
| Soil phosphorus(P)is a key factor constraining the productivity of subtropical plantation in China. However, long-term monocultural management of Pinus massoniana plantations led to prominent issues such as soil P cycle imbalance. To explore the dynamic characteristics of soil bioavailable phosphorus(Bio-P)fractions and their main influencing factors after the uneven-aged mixed transformation of P. massoniana pure plantations by introducing broadleaf tree species, this study focused on southern subtropical P. massoniana plantations. Based on the Bio-P fractionation method, we comparatively analyzed the dynamic characteristics of Bio-P fractions(Enzyme-P, Citrate-P, CaCl2-P, HCl-P)in the humus layer and eluviated layer of three forest types:mixed plantation of Pinus massoniana-Castanopsis hystrix(MP), multiple species mixed plantation of Pinus massoniana-Castanopsis hystrix/Quercus griffithii/Erythrophleum fordii/Michelia hedyosperma(MMP), and untransformed Pinus massoniana pure plantation(PP, used as control). Additionally, we combined indicators such as soil physicochemical properties, microbial biomass, and enzyme activities to identify the main factors influencing Bio-P. The results were as follows:(1)Compared with PP, the Citrate-P and HCl-P contents in the humus layer of MP were significantly increased by 31.50% and 39.78%(P<0.05), respectively, while the HCl-P content in the humus layer of MMP was significantly increased by 59.77%(P<0.05). In the eluviated layer, the Enzyme-P contents of MP and MMP were significantly increased by 39.00% and 91.13%(P<0.05), respectively, and the CaCl2-P contents of MP and MMP were significantly increased by 8.40% and 8.90%(P<0.05), respectively.(2)Compared with PP, the contents of organic carbon(OC), ammonium nitrogen(NH4+-N), available phosphorus(AP), and microbial biomass phosphorus(MBP)in the humus layer of MMP were significantly reduced(P<0.05). However, the contents of OC, total nitrogen(TN), total phosphorus(TP), AP, microbial biomass carbon(MBC), microbial biomass nitrogen(MBN), and MBP in the eluviated layer of MP and MMP were significantly increased(P<0.05).(3)Campared with PP, the enzyme activities associated with carbon(C), nitrogen(N), and phosphorus(P)cycling in the humus layer of MMP were significantly reduced by 41.42%, 34.22%, and 30.23%(P<0.05), respectively. In contrast, the aforementioned enzyme activities in the eluviated layer of MP were significantly increased by 61.17%, 157.98%, and 31.70%(P<0.05), respectively, and those in the eluviated layer of MMP were significantly increased by 40.91%, 238.66%, and 37.93%(P<0.05), respectively.(4)Nitrate nitrogen(NO3--N)and AP were the primary regulatory factors influencing Bio-P fractions in the humus layer, whereas TP and enzyme C:N ratio were the main driving factors affecting Bio-P fractions in the eluviated layer. In conclusion, the introduction of broadleaf tree species for uneven-aged mixed transformation in Pinus massoniana plantations is beneficial to soil P storage and supply. The results of this study provide an important scientific basis for tree species selection and management strategies aimed at improving soil P availability in southern subtropical plantations. |
| Key words: Pinus massoniana plantation, uneven-aged mixed transformation, humus layer, soil enzyme activity, bioavailable phosphorus |
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