欢迎访问《草业学报》官方网站,今天是 分享到:

草业学报 ›› 2024, Vol. 33 ›› Issue (8): 15-24.DOI: 10.11686/cyxb2023360

• 研究论文 • 上一篇    下一篇

柠条平茬对荒漠草原土壤水分特征及水量平衡的影响

候腾思1(), 沈艳1,2,3,4(), 马红彬1,2,3,4, 方鹏1, 曹颖1   

  1. 1.宁夏大学林业与草业学院,宁夏 银川 750021
    2.宁夏大学农业农村部饲草高效生产模式创新重点实验室,宁夏 银川 750021
    3.宁夏大学宁夏回族自治区草牧业工程技术研究中心,宁夏 银川 750021
    4.宁夏大学西北土地退化与生态恢复省部共建国家重点实验室培育基地,宁夏 银川 750021
  • 收稿日期:2023-09-25 修回日期:2023-11-13 出版日期:2024-08-20 发布日期:2024-05-13
  • 通讯作者: 沈艳
  • 作者简介:E-mail: nxshenyan@163.com
    候腾思(1998-),女,河北石家庄人,在读硕士。E-mail: 12021131204@stu.nxu.edu.cn
  • 基金资助:
    中科院“西部之光”青年学者项目(2020)和宁夏重点研发计划项目(2020BBF02003)

Effects of Caragana intermedia stubble on soil water characteristics and water balance on the desert steppe

Teng-si HOU1(), Yan SHEN1,2,3,4(), Hong-bin MA1,2,3,4, Peng FANG1, Ying CAO1   

  1. 1.College of Forestry and Prataculture,Ningxia University,Yinchuan 750021,China
    2.Key Laboratory of Forage Efficient Production Mode Innovation,Ministry of Agriculture and Rural Affairs,Ningxia University,Yinchuan 750021,China
    3.Ningxia Hui Autonomous Region Grass Husbandry Engineering Technology Research Center,Ningxia University,Yinchuan 750021,China
    4.State Key Laboratory of Land Degradation and Ecological Restoration in Northwest China,Ningxia University,Yinchuan 750021,China
  • Received:2023-09-25 Revised:2023-11-13 Online:2024-08-20 Published:2024-05-13
  • Contact: Yan SHEN

摘要:

平茬是荒漠草原人工柠条优化管理的重要手段。探究柠条平茬方式对土壤水分特征及水量平衡的影响,可为研究区柠条的合理平茬提供理论依据和实践指导。以宁夏荒漠草原区人工柠条林为对象,设置未平茬(WP)、隔1带平茬1带(G1P1)、隔3带平茬3带(G3P3)、隔5带平茬5带(G5P5)4种平茬方式,分析不同平茬方式对土壤水分和水分平衡特征的影响,结果表明:1) G3P3处理土壤含水量最高,0~200 cm土壤含水量随土壤深度的增加而升高;2) 与未种植柠条天然草地相比,WP、G1P1、G3P3和G5P5处理均有一定程度的土壤水分亏缺,其中G3P3处理水分亏缺指数最低,减缓了土壤水分消耗;3) 受环境和平茬方式的影响,4种平茬方式植被蒸腾量表现为G3P3<G1P1<G5P5<WP,棵间蒸散量表现为G3P3<G1P1<WP<G5P5,G3P3的蒸散量与降水量的比值最小。基于土壤水分和水量平衡特征方面,G3P3处理更有利于种植柠条林的荒漠草原水分保持和水量平衡。

关键词: 荒漠草原, 柠条, 平茬方式, 土壤水分, 水分亏缺, 水量平衡

Abstract:

Leaving stubble is an important method to optimize the management of Caragana intermedia on the desert steppe. The aim of this study was to determine the effects of Caragana stubble on the soil water characteristics and water balance, to provide a theoretical basis and practical guidance for rational cropping of Caragana on the desert steppe. A field study was conducted at a Caragana plantation in desert grassland of Ningxia, involving four cropping configurations: No stubble (WP); one belt stubble and one belt no stubble (G1P1), three belts stubble and three belts no stubble (G3P3), and five belts stubble and five belts no stubble (G5P5). The effects of these different cropping configurations on soil moisture and water balance were analyzed. It was found that: 1) The highest soil moisture content was in the G3P3 treatment, and the moisture content in the 0-200 cm soil layer increased with increasing soil depth; 2) Compared with natural grassland without Caragana, the WP, G1P1, G3P3, and G5P5 treatments all resulted in soil water deficit to varying degrees; the lowest water deficit index was in the G3P3 treatment, indicative of reduced soil water consumption. 3) Under the influence of environment and stubble treatments, the treatments were ranked, from highest transpiration of vegetation to lowest, as follows: G3P3<G1P1<G5P5<WP; and from highest evapotranspiration between trees to lowest, as follows: G3P3<G1P1<WP<G5P5. The ratio of evapotranspiration to rainfall was lowest in the G3P3 treatment. Based on the characteristics of soil water and water balance, the G3P3 treatment was more conducive to water retention and water balance in areas planted with Caragana on the desert steppe.

Key words: desert steppe, Caragana intermedia, stubble way, soil water, water deficiency, water balance