Effects of Inter-species Competition in Legume-Grass Mixtures on Soil Phosphorus Uptake Efficiency

doi:10.11733/j.issn.1007-0435.2026.05.008

Acta Agrestia Sinica ›› 2026, Vol. 34 ›› Issue (5): 1641-1653.DOI: 10.11733/j.issn.1007-0435.2026.05.008

Effects of Inter-species Competition in Legume-Grass Mixtures on Soil Phosphorus Uptake Efficiency

FANG Ju-mei^1,2, DOU Zi-yi^1,2, LI Gui-zhen^1,2, ZHENG Wei^1,2, WANG Ling-ling^1,2, WANG Yu-jie^1,2

1. College of Grassland Science, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China;
2. Xinjiang Key Laboratory of Grassland Resources and Ecology, Urumqi, Xinjiang 830052, China

Received:2025-10-13 Revised:2025-11-25 Published:2026-05-08

豆禾混播牧草的种间竞争对土壤磷吸收效率的影响

方菊梅^1,2, 窦梓镱^1,2, 李桂真^1,2, 郑伟^1,2, 王玲玲^1,2, 王钰杰^1,2

1. 新疆农业大学草业学院, 新疆乌鲁木齐 830052;
2. 新疆维吾尔自治区草地资源与生态重点实验室, 新疆乌鲁木齐 830052

通讯作者: 郑伟，E-mail:zw065@126.com
作者简介:#方菊梅（1996-），女，汉族，甘肃兰州人，硕士，主要从事草原学研究，E-mail:1472485973@qq.com；#窦梓镱（1998-），女，汉族，新疆昌吉人，博士，主要从事饲草学研究，E-mail:3517669621@qq.com；
基金资助:
自治区重点研发厅厅（地）联动（项目编号：2022B03030-3）资助

Abstract

Abstract: To evaluate the effects of intercropping arrangements on phosphorus use efficiency and interspecific competition in legume-grass mixtures， same-row intercropping （T） and alternate-row intercropping （Y） was conducted by the pot experiment. The study investigated the relationships among phosphorus use efficiency （PUE）， interspecific competition， and the overyielding effect in triticale-hairy vetch and triticale-common vetch systems. The results showed that for the triticale-hairy vetch mixture， yield and overyielding were higher in the same-row arrangement， whereas the triticale-common vetch mixture was the opposite. The relative yield （RY） was higher in the alternate-row arrangement for both systems. Metrics including encroachment rate （A）， competition rate （CR）， and relative crowding rate （K） indicated that triticale was the competitively dominant species. Phosphorus use efficiency varied in the triticale-hairy vetch system， and it was higher for triticale under alternate-row but higher for hairy vetch under same-row intercropping； in the triticale-common vetch system， both species showed higher PUE in the alternate-row arrangement. Threshold analysis revealed that highly competitive ability coupled with high PUE synergistically induced the overyielding effect under the alternate-row arrangement. In conclusion， for establishing annual forages in the cool region of Zhaosu， the alternate-row intercropping of triticale and common vetch is recommended.

Key words: Legume-grass intercropping, Interspecific competition, Phosphorus use efficiency, Overyielding effect

摘要： 为评估混播方式对豆禾牧草磷利用效率及种间竞争的影响，通过盆栽实验设置同行（T）与异行（Y）两种混播处理，探究小黑麦-毛苕子（Triticale-Vicia villosa Roth）、小黑麦-箭筈豌豆（Tritical Vicia sativa L.）系统中磷利用效率、种间竞争格局与超产效应的关系。结果表明：（1）产量及超产效应呈小黑麦-毛苕子同行混播高于异行混播，小黑麦-箭筈豌豆则相反。（2）两混播系统异行混播相对产量（Relative yield，RY）均高于同行混播；侵占率（Encroachment rate，A）、竞争率（Competition rate，CR）、相对拥挤率（Relative crowding rate，K）均显示小黑麦为竞争优势种。（3）磷利用效率表现为：小黑麦-毛苕子中，小黑麦异行混播高于同行混播，毛苕子则相反；小黑麦-箭筈豌豆中，二者均为异行混播高于同行混播。阈值关系分析表明，异行混播下高竞争率与高磷利用效率协同诱导超产效应。综上，昭苏冷凉地区建植一年生牧草时，推荐小黑麦-箭筈豌豆异行混播模式。

关键词: 豆禾混播, 种间竞争, 磷素利用效率, 超产效应

CLC Number:

S54
S153.6

FANG Ju-mei, DOU Zi-yi, LI Gui-zhen, ZHENG Wei, WANG Ling-ling, WANG Yu-jie. Effects of Inter-species Competition in Legume-Grass Mixtures on Soil Phosphorus Uptake Efficiency[J]. Acta Agrestia Sinica, 2026, 34(5): 1641-1653.

方菊梅, 窦梓镱, 李桂真, 郑伟, 王玲玲, 王钰杰. 豆禾混播牧草的种间竞争对土壤磷吸收效率的影响[J]. 草地学报, 2026, 34(5): 1641-1653.

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Effects of Inter-species Competition in Legume-Grass Mixtures on Soil Phosphorus Uptake Efficiency

豆禾混播牧草的种间竞争对土壤磷吸收效率的影响

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