[1]张翼,李建平,井乐.封育对天然草地深层土壤粒径分形特征的影响[J].水土保持研究,2018,25(05):131-135.
　ZHANG Yi,LI Jianping,JING Le.Effect of Grazing Enclosure on the Fractal Characteristics of Deep Soil of Grassland on the Loess Plateau[J].Research of Soil and Water Conservation,2018,25(05):131-135.
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封育对天然草地深层土壤粒径分形特征的影响

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 25 期数: 2018年05期 页码: 131-135 栏目: 出版日期: 2018-09-06
Title:
Effect of Grazing Enclosure on the Fractal Characteristics of Deep Soil of Grassland on the Loess Plateau
作者:
张翼1, 李建平1,2, 井乐1
1. 宁夏大学 农学院, 银川 750021;
2. 西北退化生态系统恢复与重建国家重点实验室培育基地, 银川 750021
Author(s):
ZHANG Yi1, LI Jianping1,2, JING Le1
1. School of Agriculture, Ningxia University, Yinchuan 750021, China;
2. Breeding Base of State Key Laboratory for Preventing Land Degradation and Ecological Restoration, Ningxia University, Yinchuan 750021, China
关键词:
封育; 分形维数; 深层土壤; 天然草地; 黄土高原
Keywords:
grazing enclosure; fractal dimension; deep soil; natural grassland; Loess Plateau
分类号:
S152.3
摘要:
为了明确长期封育对天然草地土壤粒径分形的影响，采用空间序列代替时间序列的方法，试验对比研究了黄土高原宁夏固原云雾山自然保护区封育30年草地和放牧草地的深层土壤粒径分形特征。结果表明：（1）封育30年草地土壤中粉粒含量显著低于放牧草地（p<0.05），分别为21.1%和28.1%。（2）封育30年草地的土壤粒径分形维数明显高于放牧草地（p<0.01），在140-500 cm的土层中表现尤为显著。（3）土壤粒径分形维数与粉粒和极细沙粒含量呈极显著正相关（p<0.01），而与细沙粒、中沙粒、粗沙粒呈极显著负相关（p<0.01）。因此，长期封育草地土壤粒径趋于变大，中细颗粒土壤积累减少，同时长期封育影响深层土壤结构，深层土壤物理结构信息不容忽视。
Abstract:
In order to clarify the effect of long-term fencing on the fractal dimension of soil particle size in natural grassland, different period fenced grasslands in variety location stand for sequential vegetation restoration, the fractal characteristics of deep soil particle size overgrazing enclosure and grazing grassland in Yunwushan of Guyuan on the Loess Plateau were compared. The results were as follows. (1) The silt content of soil in 30-year grazing enclosure grassland was significantly lower than that of grazing grassland (p<0.05), which were 21.1% and 28.1%, respectively. (2) The fractal dimension of soil particle sizes of the grazing enclosure grassland was significantly higher than that of grazing grassland (p<0.01), especially in the soil layer of 140-500 cm. (3) The fractal dimension of soil particle sizes had a very significant positive correlation with the contents of extreme fine sand and silt (p<0.01), but negatively correlated with fine sand, middle sand and coarse sand (p<0.01). Therefore, the soil particle size tends to increase and the accumulation of soil fine and medium particles decreased in long-term grazing enclosure. Meanwhile, the long-term grazing enclosure of grassland affects the structure of deep soil, the physical structure information of deep soil should not be ignored.

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备注/Memo

收稿日期:2018-02-27;改回日期:2018-03-27。
基金项目:国家自然科学基金（31660143）资助；宁夏大学草学一流学科建设项目（NXYLXK2017A01）
作者简介:张翼(1992-),女,甘肃兰州人,硕士,主要从事草地生态与模型构建研究。E-mail:13995378736@163.com
通讯作者:李建平(1982-),男,陕西延安人,博士,副教授,硕导,主要从事草地生态与模型构建研究。E-mail:lijianpingsas@163.com

更新日期/Last Update: 1900-01-01