史河沙地人工林套种花生对土壤碳氮组分的影响
The Impact of Arachis hypogaea Intercropping on Soil Carbon and Nitrogen Composition in the Artificial Forest of Shihe Sandy Land
周会萍 1庄静静 1邢婷婷 1张家洋2
作者信息
- 1. 新乡学院土木工程与建筑学院,河南 新乡 453003
- 2. 新乡学院生物工程学院,河南 新乡 453003
- 折叠
摘要
[目的]探究套种花生对史河沙地3种常见人工林土壤碳氮组分的影响,为豫东南史河沙地生态修复工程的林农植物选择配置模式提供科学依据.[方法]选取史河沙地栾树单种、五角枫单种、杨树单种、栾树套种花生、五角枫套种花生以及杨树套种花生6种林分类型为研究对象,通过采集各林分0～20 cm、20～40 cm和40～60 cm土层土壤进行检测,分析不同林分和不同土层之间人工林套种花生对土壤碳氮组分的影响.[结果]①在垂直方向上,6种林分的土壤碳氮各组分含量均随着土层的增加而下降,同一土层不同林分碳氮组分含量之间差异显著(P<0.05).在水平方向上,6种林分的土壤碳氮各组分含量基本表现为套种高于单种.②在浅层土壤中,栾树套种花生的土壤碳氮组分含量均为最高,而五角枫单种的含量均为最低.③相关性分析表明,TN与SOC呈极显著正相关关系(P<0.01);土壤POC、EOC等活性有机碳组分和SOC呈显著正相关(P<0.05);MBN和TN及其他氮组分均呈极显著(P<0.01)或显著(P<0.05)正相关关系.[结论]林农套种模式有利于提高沙地人工林的碳氮含量,栾树套种花生模式对史河沙地耕层土壤碳氮含量改善效果最佳.
Abstract
[Objective]The objective of this study is to investigate the effects of intercropping peanuts on the carbon and nitrogen components of three common artificial forest soils in the Shihe Sandy Land,pro-viding a scientific basis for the plant selection and configuration in the ecological restoration project of the Shihe Sandy Land in southeastern Henan Province.[Method]These stand types included Koelreuteria paniculata,Acer mono,Populus tomentosa,Koelreuteria paniculata+Arachis hypogaea,Acer mono+Ara-chis hypogaea,and Populus tomentosa+Arachis hypogaea.The effects of intercropping Arachis hypogaea on soil carbon and nitrogen fractions in different forest stands and across different soil layers were ana-lyzed by collecting soil samples from 0～20 cm,20～40 cm,and 40～60 cm layers.[Result]① with in-creasing soil depth in all six stands,and significant differences were observed between the contents of carbon and nitrogen components in different stands within the same soil layer(P＜0.05).In the horizontal direction,the contents of soil carbon and nitrogen components were generally higher in intercropping modes than in monocultures.② In the shallow soils,the soil carbon and nitrogen fractions were highest in the Koelreuteria paniculata+Arachis hypogaea intercropping and lowest in Acer mono monoculture.③Correlation analysis revealed a highly significant positive correlation between total nitrogen(TN)and soil organic carbon(SOC)(P＜0.01);active organic carbon components such as particulate organic carbon(POC)and easily oxidizable carbon(EOC)were significantly positively correlated with SOC(P＜0.05);microbial biomass nitrogen(MBN)and TN,as well as other nitrogen components,showed extremely sig-nificant(P＜0.01)or significant positive correlations(P＜0.05).[Conclusion]The soil carbon and nitro-gen component contents under intercropping were higher than those under monoculture,with Koelreuteria paniculata+Arachis hypogaea showing the best effect in improving carbon and nitrogen content in the Shihe Sandy Land.
关键词
人工林/花生/套种/土壤/碳氮组分Key words
artificial forests/peanut/interplant/soil/carbon and nitrogen components引用本文复制引用
基金项目
国家自然科学基金(32271645)
河南省科技攻关项目(222102320119)
河南省科技攻关项目(242102320334)
出版年
2024
NETL
NSTL
万方数据