草地学报2026，Vol.34Issue(5)：1641-1653,13.DOI:10.11733/j.issn.1007-0435.2026.05.008
豆禾混播牧草的种间竞争对土壤磷吸收效率的影响
Effects of Inter-species Competition in Legume-Grass Mixtures on Soil Phosphorus Uptake Efficiency
摘要
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.关键词
豆禾混播/种间竞争/磷素利用效率/超产效应Key words
Legume-grass intercropping/Interspecific competition/Phosphorus use efficiency/Overyielding effect分类
农业科技引用本文复制引用
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):1641-1653,13.基金项目
自治区重点研发厅厅(地)联动(项目编号:2022B03030-3)资助 （地）
