文献类型：期刊文献

英文题名：Forage quality and physiological performance of mowed alfalfa (Medicago sativa L.) subjected to combined light quality and drought

作者：He, Chunxia[1,2,3] Zhao, Yan[4] Wang, Yao[1,2,3] Cai, Jinfeng[2] Gao, Jun[1,2,3] Zhang, Jinsong[1,2,3]

第一作者：何春霞;He, Chunxia

通信作者：Gao, J[1];Zhang, JS[1];Gao, J[2];Zhang, JS[2];Gao, J[3];Zhang, JS[3]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, Key Lab Tree Breeding & Cultivat, Natl Forestry & Grassland Adm, Beijing, Peoples R China;[2]Nanjing Forestry Univ, Coinnovat Ctr Sustainable Forestry Southern China, Nanjing, Peoples R China;[3]Henan Xiaolangdi Earth Crit Zone Natl Res Stn Midd, Jiyuan, Peoples R China;[4]Henan Univ Sci & Technol, Coll Hort & Plant Protect, Luoyang, Peoples R China

年份：2022

卷号：13

外文期刊名：FRONTIERS IN PLANT SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000893417300001)】；

基金：Funding This research was funded by Fundamental Research Funds for the Central Non-profit Research Institution of CAF (grant number CAFYBB2020SY001 and CAFZC2017M005).

语种：英文

外文关键词：alfalfa; climate change; water deficit; understory sunlight; forage quality; mowing

摘要：Alfalfa (Medicago sativa) can dwell in water-deficient habitats, where it is difficult to predict dry mass (DM) production and forage quality due to understory transmittance. Mowing is a recommended practice for alfalfa populations under drought, but its effect on forested land receives less attention. In a controlled indoor experiment, we found that drought better reduces shoot DM weight and crude fiber content (CFi) in blue light (33.7% red, 48.5% green, and 17.8% blue lights) than red light (71.7% red, 13.7% green, and 14.6% blue lights). Mowing decreases carbon (C) isotope signature (delta C-13), CFi, and total C content in shoots but increases their accumulations in DM, nonstructural carbohydrates, and crude fat content (CFa). The results also demonstrated that mown alfalfa has higher starch content when exposed to green light (26.2% red, 56.4% green, and 17.4% blue lights) compared to the other two spectra. Multiple factorial regression indicated that higher soluble sugar content accounted for the increase of CFa and DM weight for CFi. Overall, mowing in blue-light-enriched understory stands is recommended and produces high-forage-quality alfalfa, which can be used as a lowered crude fiber component.