Effects of Nutrient Addition and Shallow Plowing on the Biomass of Grasslands in the Agro-pastoral Ecotone of Northern Shanxi

doi:10.11733/j.issn.1007-0435.2025.04.031

Acta Agrestia Sinica ›› 2025, Vol. 33 ›› Issue (4): 1299-1307.DOI: 10.11733/j.issn.1007-0435.2025.04.031

Effects of Nutrient Addition and Shallow Plowing on the Biomass of Grasslands in the Agro-pastoral Ecotone of Northern Shanxi

HAO Jie^1,3,4, NIU Hui-min^2,3,4, WANG Chang-hui^2,3,4, DIAO Hua-jie^2,3,4, WU Shuai-kai^2,3,4, SU Yuan^2,3,4, GAO Yang-yang^2,3,4, LIANG Wen-jun^2,3,4, YANG Xiu-yun¹, DONG Kuan-hu^2,3,4

1. College of Forestry, Shanxi Agricultural University, Taigu, Shanxi Province 030801, China;
2. College of Grassland Science, Shanxi Agricultural University, Taigu, Shanxi Province 030801, China;
3. Shanxi Key Laboratory of Grassland Ecological Protection and Native Grass Germplasm Innovation, Taigu, Shanxi Province 030801, China;
4. Youyu Loess Plateau Grassland Ecosystem Research Station, Youyu, Shanxi Province 037200, China

Received:2024-05-31 Revised:2024-07-08 Online:2025-04-15 Published:2025-04-28

晋北农牧交错带养分添加和浅耕翻对草地生物量的影响

郝杰^1,3,4, 牛慧敏^2,3,4, 王常慧^2,3,4, 刁华杰^2,3,4, 武帅楷^2,3,4, 苏原^2,3,4, 高阳阳^2,3,4, 梁雯君^2,3,4, 杨秀云¹, 董宽虎^2,3,4

1. 山西农业大学林学院, 山西太谷 030801;
2. 山西农业大学草业学院, 山西太谷 030801;
3. 草地生态保护与乡土草种质创新山西省重点实验室, 山西太谷 030801;
4. 山西右玉黄土高原草地生态系统国家定位观测研究站, 山西右玉 037200

通讯作者: 杨秀云,E-mail:xyyang2002@yeah.net;董宽虎,E-mail:dongkuanhu@sxau.edu.cn
作者简介:郝杰（1992-），男，汉族，山西偏关人，博士研究生，主要从事草地生态与管理研究，E-mail：ndhaojie@163.com
基金资助:
国家自然科学基金区域创新发展联合基金重点项目（U22A20576）；省博士后专项补助（6K245520001755）资助

Abstract

Abstract: Four treatments， including control， nutrient addition （nitrogen， phosphorus， potassium）， shallow tillage （15 cm） and nutrient addition + shallow tillage， were set up to investigate the effects of different grassland management measures on grassland biomass in the agro-pastoral ecotone of northern Shanxi. The results showed that the above-ground， below-ground， and total biomass increased by 68.32%， 25.78% and 41.04%， respectively， under the nutrient addition treatment， while the biomass of all levels decreased by 58%， 25.78% and 41.04%， respectively， under the shallow tillage treatment. Nutrient addition + shallow ploughing treatment had no significant effect on biomass， but root-crown ratio increased by 76.96%. Nutrient addition increased the proportion of perennial biomass； shallow ploughing and nutrient addition + shallow ploughing decreased the proportion of litter biomass and increased the proportion of annual and biennial biomass. In 2022 with higher precipitation， root-shoot ratio， below-ground biomass and total biomass were significantly higher than those in 2021 with lower precipitation， emphasizing the important role of interannual precipitation in regulating plant biomass allocation and accumulation. In conclusion， compared to short-term shallow ploughing management practices， nutrient addition was more beneficial to the grassland productivity improvement grassland in the agro-pastoral ecotone of northern Shanxi.

Key words: Nutrient addition, Shallow ploughing, Agro-pastoral ecotone, Precipitation, Biomass

摘要： 本研究通过设置对照、养分（氮、磷、钾）添加、浅耕翻（15 cm）以及养分添加+浅耕翻四个处理，旨在探究不同草地管理措施对晋北农牧交错带草地生物量的影响。结果表明：养分添加处理下的植物群落地上、地下和总生物量，分别提高了68.32%，25.78%，41.04%；浅耕翻处理下各级生物量分别降低了58.14%，27.30%，37.50%；养分添加+浅耕翻处理对生物量无显著影响，但增加了根冠比（76.96%）。养分添加增加了多年生植物生物量占比；浅耕翻、养分添加+浅耕翻降低了凋落物生物量占比，增加了一、二年生植物生物量占比。在降水量较高的2022年，根冠比、地下生物量和总生物量高于降水量较少的2021年，强调了年际降水量在调控植物生物量分配和积累方面的重要作用。综上，相比于短期浅耕翻管理措施，养分添加更有利于晋北农牧交错带草地生产力的提升。

关键词: 养分添加, 浅耕翻, 农牧交错带, 降水量, 生物量

CLC Number:

S812.4

HAO Jie, NIU Hui-min, WANG Chang-hui, DIAO Hua-jie, WU Shuai-kai, SU Yuan, GAO Yang-yang, LIANG Wen-jun, YANG Xiu-yun, DONG Kuan-hu. Effects of Nutrient Addition and Shallow Plowing on the Biomass of Grasslands in the Agro-pastoral Ecotone of Northern Shanxi[J]. Acta Agrestia Sinica, 2025, 33(4): 1299-1307.

郝杰, 牛慧敏, 王常慧, 刁华杰, 武帅楷, 苏原, 高阳阳, 梁雯君, 杨秀云, 董宽虎. 晋北农牧交错带养分添加和浅耕翻对草地生物量的影响[J]. 草地学报, 2025, 33(4): 1299-1307.

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Effects of Nutrient Addition and Shallow Plowing on the Biomass of Grasslands in the Agro-pastoral Ecotone of Northern Shanxi

晋北农牧交错带养分添加和浅耕翻对草地生物量的影响

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