Soil Water Availability Changes in Amount and Timing Favor the Growth and Competitiveness of Grass Than a Co-dominant Legume in Their Mixtures
文献类型：期刊论文
| 作者 | Xu, Weizhou2,3; Deng, Xiping3,4; Xu, Bingcheng3,4; Palta, Jairo A.1,5; Chen, Yinglong1 |
| 刊名 | FRONTIERS IN PLANT SCIENCE
 |
| 出版日期 | 2021-10-22 |
| 卷号 | 12页码:14 |
| ISSN号 | 1664-462X |
| 关键词 | growth period soil water availability biomass production competition mixture ratio |
| DOI | 10.3389/fpls.2021.723839 |
| 通讯作者 | Xu, Bingcheng(Bcxu@ms.iswc.ac.cn) |
| 英文摘要 | The grasslands on the semi-arid Loess Plateau of China are expected to be particularly responsive to the size and frequency changes of extreme precipitation events because their ecological processes are largely driven by distinct soil moisture pulses. However, the plant growth and competitiveness of co-dominant species in response to the changes in the amount and timing of soil water are still unclear. Thus, two co-dominant species, Bothriochloa ischaemum and Lespedeza davurica, were grown in seven mixture ratios under three watering regimes [80 +/- 5% pot soil capacity (FC) (high watering), 60 +/- 5% FC (moderate watering), and 40 +/- 5% FC (low watering)] in a pot experiment. The soil water contents were rapidly improved from low to moderate water and from moderate to high water, respectively, at the heading, flowering, and maturity stages of B. ischaemum, and were maintained until the end of the growing season of each species. The biomass production of both species increased significantly with the increased soil water contents, particularly at the heading and flowering periods, with a more pronounced increase in B. ischaemum in the mixtures. The root/shoot ratio of both species was decreased when the soil water availability increased at the heading or flowering periods. The total biomass production, water use efficiency (WUE), and relative yield total (RYT) increased gradually with the increase of B. ischaemum in the mixtures. The relative competition intensity was below zero in B. ischaemum, and above zero in L. davurica. The competitive balance index calculated for B. ischaemum was increased with the increase of the soil water contents. Bothriochloa ischaemum responded more positively to the periodical increase in soil water availability than L. davurica, indicating that the abundance of B. ischaemum could increase in relatively wet seasons or plenty-rainfall periods. In addition, the mixture ratio of 10:2 (B. ischaemum to L. davurica) was the most compatible combination for the improved biomass production, WUE, and RYTs across all soil water treatments. |
| WOS关键词 | SEMIARID LOESS PLATEAU ; PRECIPITATION AMOUNT ; BIOMASS PRODUCTION ; INNER-MONGOLIA ; USE EFFICIENCY ; INTERCROPPING SYSTEMS ; PLANT ; PRODUCTIVITY ; REPLACEMENT ; VARIABILITY |
| 资助项目 | National Natural Science Foundation of China[41701602] ; National Natural Science Foundation of China[42067069] ; Foundation of State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau[A314021402-2015] ; Key Research and Development Program of Shaanxi Province[2019SF-267] |
| WOS研究方向 | Plant Sciences |
| 语种 | 英语 |
| 出版者 | FRONTIERS MEDIA SA |
| WOS记录号 | WOS:000716390200001 |
| 资助机构 | National Natural Science Foundation of China ; Foundation of State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau ; Key Research and Development Program of Shaanxi Province |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/167568]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Xu, Bingcheng |
| 作者单位 | 1.Univ Western Australia, Sch Agr & Environm, UWA Inst Agr, Perth, WA, Australia 2.Yulin Univ, Coll Life Sci, Yulin, Peoples R China 3.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling, Shaanxi, Peoples R China 4.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling, Shaanxi, Peoples R China 5.CSIRO Agr & Food, Wembley, WA, Australia |
| 推荐引用方式 GB/T 7714 | Xu, Weizhou,Deng, Xiping,Xu, Bingcheng,et al. Soil Water Availability Changes in Amount and Timing Favor the Growth and Competitiveness of Grass Than a Co-dominant Legume in Their Mixtures[J]. FRONTIERS IN PLANT SCIENCE,2021,12:14. |
| APA | Xu, Weizhou,Deng, Xiping,Xu, Bingcheng,Palta, Jairo A.,&Chen, Yinglong.(2021).Soil Water Availability Changes in Amount and Timing Favor the Growth and Competitiveness of Grass Than a Co-dominant Legume in Their Mixtures.FRONTIERS IN PLANT SCIENCE,12,14. |
| MLA | Xu, Weizhou,et al."Soil Water Availability Changes in Amount and Timing Favor the Growth and Competitiveness of Grass Than a Co-dominant Legume in Their Mixtures".FRONTIERS IN PLANT SCIENCE 12(2021):14. |
入库方式： OAI收割
来源：地理科学与资源研究所
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