草地学报2026，Vol.34Issue(5)：1622-1631,10.DOI:10.11733/j.issn.1007-0435.2026.05.006
豆禾饲草多元素化学计量特征对混播的响应
Responses of Plant Multi-element Stoichiometric Characteristics of Leguminous and Gramineous Forages to Mixed Sowing
摘要
Abstract
Multi-element stoichiometric coupling is critical for plant growth.To investigate the effects of mixed cultivation of leguminous and gramineous forages on their multi-element stoichiometric characteristics in the Bashang agro-pastoral ecotone,this study used the monoculture of Medicago sativa and Bromus inermis as the control treatment and further analyzed the influences of two mixed sowing combinations,i.e.,M.sativa+B.inermis(MW)and M.sativa+B.inermis+Elymus nutans(MWP),on plant nitrogen and phosphorus stoi-chiometric characteristics,macro-element(potassium,calcium,magnesium,sulfur)contents,and microele-ment(iron,manganese,copper,zinc,nickel)contents.The results showed that the nitrogen and phosphorus contents of M.sativa and B.inermis in the monoculture treatment were higher than those in the MW and MWP mixed sowing treatments.The ratio of nitrogen to phosphorus(N∶P ratio)of M.sativa in the monocul-ture treatment showed no difference compared to those in the MW and MWP mixed sowing treatments(all exceed 16),indicating the phosphorus limitation of M.sativa.However,the N∶P ratio of B.inermis in the monoculture treatment was lower than those in the MW and MWP mixed sowing treatments,indicating a shift from nitrogen limitation to phosphorus limitation or dual limitation of nitrogen and phosphorus of B.inermis.Except for the zinc content of B.inermis,no differences in the macroelement and microelement contents of M.sativa and B.inermis were observed between monoculture treatments and mixed sowing treatments.In conclu-sion,nitrogen and phosphorus limitations might still exist in the leguminous and gramineous mixed sowing grassland in the Bashang agro-pastoral ecotone.关键词
人工草地/混播草地/生态化学计量学/大量元素/微量元素Key words
Artificial Grassland/Mixed sowing grassland/Ecological Stoichiometry/Macroelement/Microelement分类
农业科技引用本文复制引用
刘蕾,刘贵河,谭琦亓..豆禾饲草多元素化学计量特征对混播的响应[J].草地学报,2026,34(5):1622-1631,10.基金项目
国家自然科学基金项目(32301498) （32301498）
财政部和农业农村部:国家现代农业产业技术体系(CARS-34)资助 （CARS-34）
