马尾松纯林与混交林土壤碳氮磷养分特点及变化  

Characteristics and Changes of Soil Carbon,Nitrogen and Phosphorus Nutrients in Pure and Mixed Pinus massoniana Plantations

作　　者：刘云 吴桐 罗华龙 杨梅[2] Liu Yun;Wu Tong;Luo Hualong;Yang Mei(Guangxi Agricultural Vocational College,Nanning,Guangxi 530005,China;Guangxi Colleges and Universities Key Laboratory for Cultivation and Utilization of Subtropical Forest Plantation,College of Forestry,Guangxi University,Nanning,Guangxi 530004,China;Guangxi Qipo Forest Farm,Nanning,Guangxi 530225,China)

机构地区：[1]广西农业职业技术大学,广西南宁530005 [2]广西大学林学院,广西高校亚热带人工林培育与利用重点实验室,广西南宁530004 [3]广西壮族自治区国有七坡林场,广西南宁530225

出　　处：《绿色科技》2023年第18期20-24,共5页Journal of Green Science and Technology

基　　金：广西林业科技推广示范项目(编号:20200196)。

摘　　要：以马尾松纯林和马尾松与红锥、米老排混交林为研究对象,对比分析了马尾松纯林和混交林的土壤碳、氮、磷养分特征,为评价马尾松人工纯林改培效果提供参考。结果表明:(1)套种阔叶树种能显著提高马尾松根际土壤、非根际土壤pH值和有机碳含量,以米老排的表现最优;(2)套种红锥能显著提高马尾松根际土壤、非根际土壤的铵态氮,非根际土壤的硝态氮含量,而套种米老排仅能显著提高马尾松根际土壤、非根际土壤的铵态氮含量,且红锥的全氮、铵态氮和硝态氮含量显著高于米老排;(3)套种红锥能显著提高马尾松根际土壤、非根际土壤的速效磷含量,而套种米老排则显著提高了马尾松根际土壤的全磷、速效磷含量。从中可见,通过营造马尾松与红锥、米老排混交林,有利于提升土壤养分含量,该结论也可为马尾松纯林林分改造提供参考。To explore the characteristics of soil carbon,nitrogen and phosphorus nutrients in pure and mixed plantations of Pinus massoniana,and provide scientific basis for its mixed management model,in this study,the soil carbon,nitrogen and phosphorus nutrient characteristics of Pinus massoniana pure plantations and Pinus massoniana mixed plantations with Castanopsis hystrix and Mytilaria laosensis were compared and analyzed,so as to provide a reference for evaluating the effect of Pinus massoniana artificial pure plantation cultivation.The results showed that the interplanting of broad-leaved trees could significantly increase the pH value and organic carbon content in the rhizosphere soil and non-rhizosphere soil of Pinus massoniana;Intercropping with Castanopsis hystrix can significantly increase the ammonium nitrogen and nitrate nitrogen content of Pinus massoniana rhizosphere soil and non-rhizosphere soil,while intercropping with rice row can only significantly increase the ammonium nitrogen content of Pinus massoniana rhizosphere soil and non-rhizosphere soil,and the total nitrogen,ammonium nitrogen and nitrate nitrogen content of Castanopsis hystrix is significantly higher than that of rice row;Intercropping with Castanopsis hystrix could significantly increase the content of available phosphorus in Pinus massoniana rhizosphere soil and non-rhizosphere soil,while intercropping with rice row could significantly increase the content of total phosphorus and available phosphorus in Pinus massoniana rhizosphere soil.To sum up,it is beneficial to improve the soil nutrient content by building mixed plantations of Pinus massoniana,Castanopsis hystrix and Mytilaria laosensis.This conclusion provides a theoretical basis for the transformation of pure Pinus massoniana stands.

关 键 词：马尾松 混交林 养分 互补转移 

分 类 号：S791.248[农业科学—林木遗传育种]