中国草地学报2025，Vol.47Issue(9)：56-68,13.DOI:10.16742/j.zgcdxb.20250118
保护播种对青藏高原高寒混播草地生产力和土壤理化性质的影响
Impacts of Companion Crops on Productivity and Soil Physicochemical Properties in Alpine Mixed-Sown Grasslands of the Qinghai-Xizang Plateau
摘要
Abstract
This study investigated the effects of companion crops on forage growth and soil physico-chemical properties during the first year of establishing a perennial alpine mixed grassland(Elymus brevia-ristatus'Tongde'and Puccinellia tenuiflora'Tongde')on the Qinghai-Xizang Plateau.The impacts of Brassica napus,Vicia faba,and Avena sativa at sowing rates of 10%,30%,and 50%of their respective monoculture amounts were assessed.Aboveground biomass,belowground biomass,forage nutritional quality,and soil physicochemical properties were measured.The results showed that companion crops sig-nificantly improved forage productivity,nutritive value,soil moisture,and nutrients availability compared with the control.The 50%Vicia faba treatment yield the greatest benefits,significantly enhancing aboveg-round biomass(321.83%),belowground biomass(56.29%),crude protein(132.22%),ether extract(52.75%),and relative feeding value(126.80%),as well as soil moisture(14.35%),total nitrogen(57.58%),ammonium nitrogen(301.49%),and nitrate nitrogen(185.00%).Structural equation model-ing indicated that soil nitrogen and phosphorus contents were the primary drivers of forage biomass,nutri-tional quality,and soil physicochemical properties.A comprehensive Technique for Order Preference by Similarity to an Ideal Solution(TOPSIS)evaluation further identified the 50%Vicia faba treatment as the optimal companion crop strategy for establishing perennial alpine mixed grasslands on the Qinghai-Xizang Plateau.关键词
保护播种/混播草地/生物量/营养品质/土壤理化性质Key words
Companion crops/Mixture grassland/Biomass/Nutritional quality/Soil physicochemical properties分类
农业科技引用本文复制引用
王鑫鑫,岳思玉,曹铨,张春平,张正社,俞旸,董全民,魏孔涛,周泽,张雪..保护播种对青藏高原高寒混播草地生产力和土壤理化性质的影响[J].中国草地学报,2025,47(9):56-68,13.基金项目
国家重点研发计划项目(2022YFD1302104) （2022YFD1302104）
