文献类型：期刊文献

英文题名：Effects of mowing frequency on the interspecific water relationships of a walnut (Juglans regia L.)-alfalfa (Medicago sativa L.) intercropping system

作者：Wang, Yao[1,2,3] He, Chunxia[1,2,3,5] Meng, Ping[1,2,3] Sun, Shoujia[1,2,3] Zhang, Jinsong[1,2,3,5] Xue, Pan[4] Li, Jianxia[6] Cai, Jinfeng[2]

第一作者：Wang, Yao;王雁

通信作者：He, CX[1];Zhang, JS[1];He, CX[2];Zhang, JS[2];He, CX[3];Zhang, JS[3];He, CX[4];Zhang, JS[4]

机构：[1]Chinese Acad Forestry, Key Lab Tree Breeding & Cultivat, Natl Forestry & Grassland Adm, Res Inst Forestry, Beijing 100091, Peoples R China;[2]Nanjing Forest Univ, Collaborat Innovat Ctr Sustainable Forestry Southe, Nanjing 210037, Jiangsu, Peoples R China;[3]Henan Xiaolangdi Forest Ecosyst Natl Observat & Re, Jiyuan 454650, Peoples R China;[4]Jiyuan Vocat & Tech Coll, Jiyuan 454650, Peoples R China;[5]Chinese Acad Forestry, Res Inst Forestry, 1 East Xiaofu,Xiangshan Rd, Beijing, Peoples R China;[6]Forestry Workstat Jiyuan Demonstrat Area, Jiyuan 454650, Peoples R China

年份：2024

外文期刊名：PLANT AND SOIL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001278316600001)】；

基金：We thank Jiantuan Fan from Nanshan Forest Farm, Jiyuan City for contributing to the prep work. We thank Xiangfen Cheng, Qingmei Pan and Meijun Hu for the suggestion to this manuscript. We thank Junchen Wang for his help with the language approach. We thank the support by Fundamental Research Funds for the Central Non-profit Research Institution of CAF (grant number CAFYBB2020SY001) and the Jiyuan Science and Technology Programme project (20021021).

语种：英文

外文关键词：Mowing frequency; Sources of plant water; Water use efficiency; Water consumption

摘要：Background and aims Mowing is used as a management practice in tree-grass agroforestry, but the water relationships between trees and grasses have been divergent. Here, we aim to reveal the effect of mowing frequency on the interspecific water relationships. Methods Walnut (Juglans regia L.) was intercropped with alfalfa (Medicago sativa L.) from 2021 to 2022, and the responses of soil moisture, plant roots and moisture sources, water use efficiency (WUE) and water consumption to different mowing frequencies (once, twice and thrice) were investigated. Results The soil moisture did not respond significantly to the mowing frequency; mowing significantly increased the root length density of alfalfa in all soil layers, especially in the 0-20 cm layer; mowing twice and thrice affected the water sources of walnut and alfalfa, and it increased the proportion of walnut trees that used deep soil water (up to 64.60%) and the proportion of alfalfa that used surface soil water (up to 58.5%); The WUE of walnut did not respond significantly to mowing, while that of alfalfa did (the highest average WUE of 5.44 mmol C/mol H2O was found when alfalfa was mowed twice, which increased by 4.42% over the WUE of the mowing once treatment (CK)); compared to CK, the total water consumption of the intercropping system was unchanged when mowed twice but increased significantly when mowed thrice. Conclusion In the early stages, the walnut-alfalfa intercropping system can be managed by mowing twice, which can improve the WUE of alfalfa and maintain soil moisture.