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典型黑土带玉米农田土壤微生物群落地理分布及驱动因素

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探究东北黑土带土壤微生物群落的地理分布格局及其驱动因子,对于有效和可持续地管理这一宝贵的土地资源具有重要的学术价值.本文以东北典型黑土带玉米农田的耕层土壤为研究对象,采集了来自黑龙江省、吉林省和辽宁省24个样点 72个土壤样本.利用磷脂脂肪酸(Phospholipid fatty acid,PLFA)技术定量描述土壤微生物群落结构,运用随机森林和层次分割分析等机械学习算法深入解析环境因子对微生物地理分布的相对贡献.研究发现,典型黑土带玉米农田土壤总微生物和各微生物类群的生物量呈现随纬度自南向北增加的空间分布格局;土壤有机碳(SOC)和土壤全氮(TN)不仅是驱动微生物生物量纬度分布格局的主要因素,也是影响微生物群落组成最重要的因素.SOC和TN还与其他环境因子,特别是与土壤粘粒含量(CC)之间存在耦合关系,共同影响东北黑土带土壤微生物群落组成.
Geographical distribution of soil microbial community and driving factors in corn farmland of typical black soil belt
Understanding the geographic distribution and driving factors of soil microbial communities in the black soil belt of Northeast China is of great scientific value for the effective and sustainable management of this valuable land resource.In this paper,we collect a total of 72 plough layer soil samples in 24 corn farmlands from the typical black soil belt.Phospholipid fatty acid(PLFA)method is used to quantitatively estimate soil microbial community composition,and mechanical learning algorithms including random forest and hierarchical segmentation analysis are used to explore the relative contributions of environmental factors to the microbial geographical distribution.The results show that the biomass of total microbes and microbial groups in the corn farmland of the typical black soil belt exhibit an increased spatial distribution pattern from south to north.Soil organic carbon(SOC)and soil total nitrogen(TN)are the main factors that drive the latitudinal distribution patterns of microbial biomass and the composition of microbial communities.These factors are closely related to other environmental factors,particularly soil clay content(CC),which collectively influence the composition of soil microbial communities within the black soil belt of Northeast China.

biogeographytypical black soil beltmicrobial biomasssoil organic carbonanalytic hierarchy process

逄梦璇、刘红文、韩旭、张梦亭、刘萍、高燕、张淼、张士秀、梁爱珍

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中国科学院东北地理与农业生态研究所 黑土区农业生态重点实验室, 吉林 长春 130102

中国科学院大学, 北京 100049

北华大学林学院,吉林 吉林, 132013

生物地理 典型黑土 微生物生物量 土壤有机碳 层次分割

中国科学院战略性先导科技专项中国科学院战略性先导科技专项国家自然科学基金项目国家重点研发计划项目中国科学院青年创新青促会项目中国科学院东北地理与农业生态研究所青年科学家小组项目

XDA28020401XDA28080000420770462022YFD150020320212282022QNXZ04

2024

10.11689/sc.2023051702

土壤与作物
中国科学院东北地理与农业生态研究所

土壤与作物

CSTPCD
影响因子：0.623
ISSN：2095-2961
年,卷(期)：2024.13(1)
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