Short-Term Effects of Additional Application of Biogas Slurry Fertilizer on the Physicochemical Properties of Moderately Degraded Grassland Soil

doi:10.11733/j.issn.1007-0435.2026.06.026

Acta Agrestia Sinica ›› 2026, Vol. 34 ›› Issue (6): 2242-2251.DOI: 10.11733/j.issn.1007-0435.2026.06.026

Short-Term Effects of Additional Application of Biogas Slurry Fertilizer on the Physicochemical Properties of Moderately Degraded Grassland Soil

LI Yan-hua^1,2, YU Qun-jia^1,2, ZHU Chun-lei^1,2, MA Yue-qi^1,2, ZHENG Bo-fang^1,2, ZHANG LEI^1,2, WANG Cheng-jie^1,2

1. College of Grassland Science, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, China;
2. Key Laboratory of Grassland Resources of the Ministry of Education, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, China

Received:2025-08-20 Revised:2025-09-27 Published:2026-06-02

增施沼液肥对中度退化草地土壤理化性质的短期影响

李艳华^1,2, 于群家^1,2, 朱春磊^1,2, 马玥琪^1,2, 郑博方^1,2, 张磊^1,2, 王成杰^1,2

1. 内蒙古农业大学草业学院, 内蒙古呼和浩特 010018;
2. 内蒙古农业大学草原资源教育部重点实验室, 内蒙古呼和浩特 010018

通讯作者: 王成杰,E-mail:nmgcjwang3@163.com
作者简介:李艳华(2000-),女,汉族,内蒙古呼伦贝尔人,硕士研究生,主要从事草地资源生态与管理研究,E-mail:qingxiu169@163.com
基金资助:
内蒙古农业大学一流学科科研专项（YLXKZX-NND-029）；创新平台载体（人才）计划项目“内蒙古自治区草地管理与利用重点实验室（2022PT0003）”资助

Abstract

Abstract: To investigate the short-term effects of biogas slurry fertilizer on the physicochemical properties of degraded grassland soil， this study investigated moderately degraded grasslands in Zhenglan Banner， Xilingol League. Four treatments were established： blank control （CK）， water control （W₀）， 50% diluted concentration of biogas slurry fertiliser （BS_50%）， and full concentration of biogas slurry fertiliser （BS_100%）. The application rate was 300 m³·ha^-1. The contents of nitrogen （N）， phosphorus pentoxide （P₂O₅） and potassium oxide （K₂O） in the biogas slurry are 0.11%， 0.07% and 0.09% respectively. Soil samples from 0~15 cm and 15~30 cm soil layers were collected to analyze their physical and chemical property indexes. The results showed that compared with CK， both BS_50% and BS_100% treatments significantly improved soil physical structure， with decreasing soil bulk density and increasing soil porosity. Applying biogas slurry fertilizer markedly enhanced soil physical and chemical properties and microbial activity. The contents of soil total nitrogen， available phosphorus and available potassium increased significantly by 14.50%-25.86%， 66.87%-204.06% and 30.26%-193.91%， respectively， while the contents of soil microbial biomass carbon and microbial biomass nitrogen increased significantly by 11.04%-18.39% and 12.47%-28.34%， respectively. This study revealed the short-term effects of biogas slurry fertilizer on the physicochemical properties of degraded grassland soils. It provides fundamental scientific evidence for restoring degraded grasslands and enhancing soil fertility， while also offering reference support for the resource utilization of biogas slurry fertilizer and the sustainable management of grassland ecosystems.

Key words: Biogas slurry fertilizer, Typical grassland, Moderately degraded grassland, Soil physical and chemical properties

摘要： 为探究沼液肥对退化草地土壤理化性质的短期影响，本研究以锡林郭勒盟正蓝旗中度退化草地为对象，设置空白对照（CK）、水分对照（W₀）、50%稀释浓度沼液肥（BS_50%）和全浓度沼液肥（BS_100%）4种处理，施用量为300 m³·ha^-1。沼液养分氮（N）、磷（P₂O₅）和钾（K₂O）含量分别为0.11%，0.07%和0.09%。采集0~15 cm、15~30 cm土层的土壤样品，分析其理化性质指标。结果表明：与CK相比，BS_50%和BS_100%处理均能显著改善土壤物理结构，降低土壤容重（Soil bulk density， SBD），提高土壤孔隙度（Soil porosity， SP）。增施沼液肥能显著提升土壤理化性质及微生物活性，土壤全氮（Soil total nitrogen， STN）、速效磷（Soil available phosphorus， SAP）、速效钾（Soil available potassium， SAK）含量显著增加14.50%~25.86%，66.87%~224.17%和30.26%~193.91%，土壤微生物生物量碳（Soil microbial biomass carbon， SMBC）、土壤微生物生物量氮（Soil microbial biomass nitrogen， SMBN）含量显著增加11.04%~18.39%，12.47%~28.34%。本研究揭示了沼液肥对退化草地土壤理化性质影响的短期效应，为修复退化草地、提升土壤地力提供基础科学依据，也为沼液肥的资源化利用及草地生态系统的可持续管理提供了参考支撑。

关键词: 沼液肥, 典型草原, 中度退化草地, 土壤理化性质

CLC Number:

S812.2

LI Yan-hua, YU Qun-jia, ZHU Chun-lei, MA Yue-qi, ZHENG Bo-fang, ZHANG LEI, WANG Cheng-jie. Short-Term Effects of Additional Application of Biogas Slurry Fertilizer on the Physicochemical Properties of Moderately Degraded Grassland Soil[J]. Acta Agrestia Sinica, 2026, 34(6): 2242-2251.

李艳华, 于群家, 朱春磊, 马玥琪, 郑博方, 张磊, 王成杰. 增施沼液肥对中度退化草地土壤理化性质的短期影响[J]. 草地学报, 2026, 34(6): 2242-2251.

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Short-Term Effects of Additional Application of Biogas Slurry Fertilizer on the Physicochemical Properties of Moderately Degraded Grassland Soil

增施沼液肥对中度退化草地土壤理化性质的短期影响

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