Characteristics of Nitrogen and Phosphorus Utilization in Plants and the Relationships with Soil in Fenced Desert Grasslands Physicochemical Properties

doi:10.11733/j.issn.1007-0435.2025.10.021

Acta Agrestia Sinica ›› 2025, Vol. 33 ›› Issue (10): 3330-3340.DOI: 10.11733/j.issn.1007-0435.2025.10.021

Characteristics of Nitrogen and Phosphorus Utilization in Plants and the Relationships with Soil in Fenced Desert Grasslands Physicochemical Properties

ZHANG Rui, CUI Yuan-yuan, WANG Yue-hua, ZHU Ai-min, WU Qian, HAN Guo-dong, HOU Dong-jie, WNAG Zhong-wu

College of Grassland Science Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010019, China

Received:2025-03-25 Revised:2025-04-28 Published:2025-10-17

围封荒漠草原植物氮磷利用特征及其与土壤理化性质的关系

张蕊, 崔媛媛, 王悦骅, 朱爱民, 武倩, 韩国栋, 侯东杰, 王忠武

内蒙古农业大学草业学院, 内蒙古呼和浩特 010019

通讯作者: 侯东杰,E-mail:houdongjie01@126.com;王忠武,E-mail:wangzhongwu@imau.edu.cn
作者简介:侯东杰,E-mail:houdongjie01@126.com;王忠武,E-mail:wangzhongwu@imau.edu.cn
基金资助:
内蒙古自治区自然科学基金项目（2023QN03051）；国家自然科学基金（32460353）；内蒙古科技重大专项（2024JBGS0011）；内蒙古自治区“揭榜挂帅”项目（2024JBGS0011-03）；内蒙古农业大学一流学科科研专项（YLXKZX-NND-002）；内蒙古农业大学草学学科青年基金（IMAUCXQJ2023014）资助

Abstract

Abstract: Fencing， as an important restoration measure for degraded grasslands， alters the characteristics of plant nutrient utilization. However， there is currently a lack of in-depth understanding of how plant nutrient use efficiency changes with the duration of fencing and which factors regulate it. The aboveground nitrogen （N） and phosphorus （P） contents of four plant species in the Inner Mongolian desert steppe under different fencing durations （control， 8 years of fencing， and 20 years of fencing） were measured. Combined with the study of soil physical and chemical properties， we found that fencing measures and interactions between species had significant effects on the utilization efficiency of plant P. Fencing significantly reduced the aboveground N and P contents of four plant species， with Artemisia frigida showing the highest N and P contents， and significantly increased the N and P use efficiencies of the four plant species， and Stipa breviflora had the highest N and P use efficiencies. Fencing significantly improved the aboveground N pool and P pool of the community， decreased soil temperature， soil pH， and soil bulk density， increased soil water content， soil available nitrogen （AN） content， soil total nitrogen， total phosphorus， and soil available phosphorus （AP） contents. The results from the structural equation model showed that fencing indirectly increased the contents of AN and AP by directly reducing soil temperature and increasing soil water content， and thus improved the N and P use efficiency of the four plant species. This study deepens the understanding of the nutrient cycling in the fenced desert steppe ecosystems and provides a theoretical basis for the scientific management of degraded desert steppes.

Key words: Nutrient utilization, Plant nitrogen and phosphorus nutrients, Soil physicochemical properties, Fencing, Desert steppe

摘要： 围封作为退化草地重要的修复措施，改变植物养分状态和利用特征。然而植物养分利用效率随围封年限如何变化及其受到哪些因子调控，目前缺乏深入的认知。对不同围封年限（对照，围封8年和围封20年）的内蒙古荒漠草原4种植物的地上氮（Nitrogen，N）和磷（Phosphorus，P）含量进行测定，并结合土壤理化性质研究发现：围封措施与物种间的交互作用对植物P利用效率具有显著影响，围封显著降低4种植物地上N、P含量且冷蒿的N、P含量较高，增加4种植物的N、P利用效率，其中短花针茅具有较高的N、P利用效率；围封显著提高群落地上N库和P库，降低土壤温度、土壤pH值和土壤容重，提高土壤含水量和土壤有效氮（Available nitrogen，AN）含量，并增加土壤全氮、全磷和有效磷（Available phosphorus，AP）含量。围封直接通过降低土壤温度和提高土壤含水量进而提高土壤AN和AP含量，土壤速效养分的提高间接提高4种植物的N和P利用效率。本研究加深了对围封荒漠草原生态系统养分循环的理解，为退化荒漠草原的科学管理提供理论依据。

关键词: 养分利用, 植物氮磷养分, 土壤理化性质, 围封, 荒漠草原

CLC Number:

S812

ZHANG Rui, CUI Yuan-yuan, WANG Yue-hua, ZHU Ai-min, WU Qian, HAN Guo-dong, HOU Dong-jie, WNAG Zhong-wu. Characteristics of Nitrogen and Phosphorus Utilization in Plants and the Relationships with Soil in Fenced Desert Grasslands Physicochemical Properties[J]. Acta Agrestia Sinica, 2025, 33(10): 3330-3340.

张蕊, 崔媛媛, 王悦骅, 朱爱民, 武倩, 韩国栋, 侯东杰, 王忠武. 围封荒漠草原植物氮磷利用特征及其与土壤理化性质的关系[J]. 草地学报, 2025, 33(10): 3330-3340.

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Characteristics of Nitrogen and Phosphorus Utilization in Plants and the Relationships with Soil in Fenced Desert Grasslands Physicochemical Properties

围封荒漠草原植物氮磷利用特征及其与土壤理化性质的关系

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