[1]杜子银,等.冻融及牲畜排泄物作用下的高寒草地土壤物理特性和氮磷变化[J].山地学报,2022,(1):29-42.[doi:10.16089/j.cnki.1008-2786.000653]
 DU Ziyin,,et al.Effects of Seasonal Freeze-Thaw Cycles and Livestock Excreta Returning on Soil Physical Properties, and Nitrogen and Phosphorus Dynamics in Alpine Grassland[J].Mountain Research,2022,(1):29-42.[doi:10.16089/j.cnki.1008-2786.000653]
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冻融及牲畜排泄物作用下的高寒草地土壤物理特性和氮磷变化
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2022年第1期
页码:
29-42
栏目:
山地环境
出版日期:
2022-02-04

文章信息/Info

Title:
Effects of Seasonal Freeze-Thaw Cycles and Livestock Excreta Returning on Soil Physical Properties, and Nitrogen and Phosphorus Dynamics in Alpine Grassland
文章编号:
1008-2786-(2022)1-29-14
作者:
杜子银1 2 3王小丹2 3洪江涛2 3*张青松1
1. 西华师范大学 地理科学学院,四川 南充 637009; 2. 中国科学院、水利部成都山地灾害与环境研究所,成都 6100413. 中国科学院申扎高寒草原与湿地生态系统观测试验站,西藏 申扎 853199
Author(s):
DU Ziyin1 2 3 WANG Xiaodan2 3 HONG Jiangtao2 3* ZHANG Qingsong1
1. School of Geographical Sciences, China West Normal University, Nanchong 637009, Sichuan China2. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China3. Xainza Alpine Steppe and Wetland Ecosystem Observation Station, Chinese Academy of Sciences, Shenzha 853199, Tibet, China
关键词:
冻融 牲畜排泄物 矿化氮 有效磷 高寒草地 青藏高原
分类号:
S154.1
DOI:
10.16089/j.cnki.1008-2786.000653
文献标志码:
A
摘要:
在青藏高原高寒草地生态系统中,牲畜排泄物自身冻融及其降解过程调控其养分释放及返还效率,影响草地土壤养分平衡和植被生长的养分供应。当前关于季节性冻融区草地土壤理化特性的研究,多通过定点监测和室内冻融模拟等方式分析冻融循环对土壤物理结构、水热变化及碳氮动态等方面的影响,尚缺乏关于草地土壤季节性冻融与牲畜排泄物耦合效应和作用机制方面的研究报道。本文以藏北高原季节性冻土区为例,通过开展室内冻融模拟试验,探究牲畜排泄物添加与土壤冻融作用下的高寒草地土壤物理特性及氮磷养分变化特征。结果表明:(1)冻融模拟试验30 d后显著降低了5~10 cm和10~15 cm土壤含水量(P<0.05),频繁的冻胀融沉导致土壤团聚体破碎增加了深层土壤粉粒含量。(2)冻融作用增强了土壤氮矿化与硝化作用,牲畜粪尿添加使得表土铵态氮和硝态氮含量最大值分别达到212 mg·kg-1和48.8 mg·kg-1。(3)牲畜排泄物磷的释放和冻融作用下土壤磷的深层渗透是导致不同土层有效磷含量差异的主要因素。本研究有助于认识牲畜排泄物返还与草地土壤季节性冻融的耦合效应和作用机制,并为优化牲畜排泄物管理模式、促进草地生态系统可持续发展提供理论指导。

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备注/Memo

备注/Memo:
收稿日期(Received date):2021-07-16; 改回日期(Accepted date):2022-01-06
基金项目(Foundation item):国家重点研发计划项目(2019YFD1100504); 第二次青藏高原综合科学考察研究项目(2019QZKK0404); 国家自然科学基金(41807109); 西华师范大学博士科研启动项目(17E042)和一般培育项目(18B016)。[National Key Research and Development Program of China(2019YFD1100504); The Second Tibetan Plateau Scientific Expedition and Research Program(2019QZKK0404); National Natural Science Foundation of China(41807109); The Doctoral Research Launch Fund Project and National General Cultivation Project of China West Normal University(17E042, 18B016)]
作者简介(Biography):杜子银(1988-),男,重庆人,博士,副教授,主要研究方向:高寒草地生态学。[DU Ziyin(1988-), male, born in Chongqing, Ph.D., associate professor, research on alpine grassland ecology] E-mail: duzy@cwnu.edu.cn
*通讯作者(Corresponding author):洪江涛(1986-),男,博士,副研究员,主要研究方向:高寒草地生态环境。[HONG Jiangtao(1986-), male, Ph.D., associate professor, research on alpine grassland ecological environment] E-mail:hongjiangtao@imde.ac.cn
更新日期/Last Update: 2022-01-30