ZONG Qiaoyu,AI Ning,LIU Guangquan,et al.Effects of Different Abandonment Years on Deep Soil Water of Ziziphus jujube(Mill.)Forest in Loess Area of Northern Shaanxi[J].Research of Soil and Water Conservation,2021,28(04):70-76.
撂荒年限对陕北黄土区山地枣林土壤水分的影响
- Title:
- Effects of Different Abandonment Years on Deep Soil Water of Ziziphus jujube(Mill.)Forest in Loess Area of Northern Shaanxi
- 文章编号:
- 1005-3409(2021)04-0070-07
- 分类号:
- S152.7
- 文献标志码:
- A
- 摘要:
- 为了研究撂荒年限对陕北黄土区山地枣林土壤水分的影响,选取延川县齐家山红枣试验示范基地不同撂荒年限山地枣林为主要研究对象,并选取撂荒苹果林和撂荒草地为对照,通过土钻法对其0—340 cm土层土壤水分进行研究。结果表明:(1)生长季中不同撂荒年限下各林地土壤水分表现出随季节变化的波动性;(2)不同撂荒年限下枣林地平均土壤含水量存在显著差异(p<0.05),生长季中均表现为3 a>6 a>1 a>20 a,生长季中不同植被类型下平均土壤含水量也存在显著差异(p<0.05),均表现为撂荒枣树最高,撂荒苹果林次之,撂荒草地最小;(3)不同撂荒年限下各林地土壤干燥化强度都属于轻度干燥化,平均干燥化指数介于0.17%～1.23%;(4)撂荒1 a,3 a和6 a枣林地在40—140 cm土层夏季土壤储水补偿度基本在平衡值之间波动,说明生长季内撂荒枣林地在该土层土壤水分消耗与补充基本达到平衡,夏季降雨并未对撂荒20 a枣林地土壤水分亏缺进行补偿,土壤水分亏缺没有得到改善,该样地土壤水分亏缺加重。综上,研究不同撂荒年限下山地枣林土壤水分的动态变化,对该区撂荒土地的再利用具有重要的意义。
- Abstract:
- In order to study the seasonal dynamic changes of soil water characteristic under different fixed number of year of the abandoned Ziziphus jujube(Mill.)forest in northern Shaanxi loess area, we selected Qijiashan jujube test base of Yanchuan County, northern Shaanxi jujube experiment demonstration base of different fixed number of year of the abandoned mountain Ziziphus jujube as the main research site, and abandoned forest and abandoned grass as the controls, examined the soil moisture of the 0—340 cm soil layer by the soil drilling sampling method. The results show that:(1)the soil moisture in growing season in the woodland under different fixed number of year of the abandoned shows the volatile changes with the seasons, and soil water seasonal variation decreases with the increase of soil depth;(2)there are significant differences in the average soil water content of jujube forest under different years of fallow(p<0.05); in the growing season, the average soil water content decreases in the order: 3 a>6 a>1 a>20 a, and there are also significant differences in the average soil water content under different vegetation types(p<0.05);(3)the soil desiccant intensity of each forest land under different fallow years is slightly desiccant, with the average desiccant index ranging from 0.17% and 1.23%;(4)the compensation degree of soil water storage in summer in the 40 cm to 140 cm soil layer of jujube forest lands with the fallow of 1 years, 3 years and 6 years fluctuates basically between the equilibrium value, indicating that the soil water consumption and supplement of the fallow jujube forest lands in this soil layer basically reaches the balance during the growing season. The rainfall in summer does not compensate for the soil water deficit in the jujube forest with 20-year abandonment, and the soil water deficit is not improved. In summary, studying the dynamic changes of soil moisture in jujube forests in mountainous areas under different abandonment years is of great significance to the reuse of abandoned land in this area.
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备注/Memo
收稿日期:2020-09-01 修回日期:2020-09-23资助项目:“十三五”国家重点研发计划(2016YFC0501602; 2016YFC0501705); 大学生创新创业训练计划项目(D2019111)第一作者:宗巧鱼,(1994—),女,陕西延安人,硕士研究生,研究方向为水土保持与林业生态工程。E-mail:Zongqiaoyu@163.com通信作者:艾宁(1989—),男,陕西延安人,博士,研究生导师,主要从事水土保持与林业生态工程研究。E-mail:aining_Office@126.com