干旱区生态环境知识资源中心(Arid): 不同管理模式下干旱草地粒度特征

Arid

	不同管理模式下干旱草地粒度特征
其他题名	Particle Size Distribution Characteristics of Arid Grassland Under Different Management Modes
	郄亚栋 1; 杨建军 1; 孙华斌 2; 何学敏 3; 吕光辉3
来源期刊	土壤
ISSN	0253-9829
出版年	2017
卷号	49 期号:6 页码:1243-1253
中文摘要	土壤粒径分布及空间变化对土壤溶质和水盐运移、土壤肥力状况等有重要意义,是土壤重要物理特性之一。基于新疆准噶尔北部、阿勒泰山南麓不同管理模式下的草地(荒漠草地、天然草地、弃耕草地、季节草地和禁牧草地),运用质地分类和分形理论探讨草地粒度特征。结果发现:研究区土壤颗粒中黏粒含量最低,最小值仅有0.17g/kg,砂粒含量最高,最大值可达900.37 g/kg,粒径分布呈现单峰特征,表明土壤发育较差;砂粒和粉粒含量之间呈极显著负相关关系,相关系数为0.999 8(P<0.01),推测成土母质和地域差异导致土壤中砂粒和粉粒几乎占了全部;荒漠草地、天然草地和弃耕草地黏粒含量的平均值随着土层深度增加而减小,呈现出负相关特征,而季节草地和禁牧草地并无此特征;荒漠草地的分形维数D值最大,可能是因为灌木作为该生态系统中的优势植物,能有效地减缓荒漠草地逆向演替和消亡的进程,对土壤颗粒具有一定的细化作用;所有土壤样品分形维数D与黏粒含量均具有较强相关性,天然草地、荒漠草地和弃耕草地的分形维数D分别与粉粒和砂粒含量的相关性较强,与禁牧和季节草地的相关性较差,说明春、秋轮牧对土壤的干扰可能超过了土壤本身承载能力,对土壤颗粒组成破坏比较大,影响了土壤发育,放牧向禁牧转化时期的长短可能决定了土壤的发育是否良好。
英文摘要	As one of the important physical properties of soil, particle size distribution (PSD) and spatial variation is of great significance not only to the transport of soil solute, water and salt, but also to soil fertility status and so on. Based on the grasslands (desert grassland, natural grassland, abandoned grassland, seasonal grassland and forbidden grassland) under the different management modes in the northern Junggar and southern Altay Mountains, the texture classification and fractal theory were used to study PSD characteristics of grasslands. The results showed that clay content in the study area was the lowest with the minimum value of only 0.17 g/kg while sand content was the highest with the maximum value of 900.37 g/kg; PSD showed a single peak, indicating that the soil is poorly developed; silt and sand contents showed significant negative correlation with the correlation coefficient of 0.999 8 (P<0.01),suggesting that soil parent material and geographical differences lead to sand and silt particles almost accounted all of the soils. Mean clay content decreased with the increase of soil depth in desert grassland, natural grassland, and abandonment grassland, while no such tendency was found in the seasonal grassland and forbidding grazing grassland. The fractal dimension of D in desert grassland is the highest, which may be because the shrubs, as dominant plants in the ecosystem, can effectively slow down the process of reverse succession and extinction and had a certain effect in the accumulation of fine particles; Fractal dimension D had significant correlation with and clay content of all soils and with silt and sand contents of desert grassland, natural grassland, and abandonment grassland, whereas not with those of seasonal grassland and forbidding grazing grassland. The above results showed that the interference of spring and autumn grazing on soil may exceed soil bearing capacity, damage largely soil particles and hinder soil development, and the length of grazing transforming into prohibition may determine whether the development of the soil is good or not.
中文关键词	土壤粒径分布 ; 草地管理 ; 干旱草地 ; 质地三角 ; 分形分析
英文关键词	Soil particle size distribution (PSD) Grassland management Arid grassland Texture triangle Fractal analysis
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6136991
来源机构	新疆大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236762
作者单位	1.新疆大学资源与环境科学学院, 绿洲生态教育部重点实验室, 乌鲁木齐, 新疆 830046, 中国; 2.新疆富蕴县草原站, 阿勒泰, 新疆 836109, 中国; 3.新疆大学干旱生态环境研究所, 绿洲生态教育部重点实验室, 乌鲁木齐, 新疆 830046, 中国
推荐引用方式 GB/T 7714	郄亚栋,杨建军,孙华斌,等. 不同管理模式下干旱草地粒度特征[J]. 新疆大学,2017,49(6):1243-1253.
APA	郄亚栋,杨建军,孙华斌,何学敏,&吕光辉.(2017).不同管理模式下干旱草地粒度特征.土壤,49(6),1243-1253.
MLA	郄亚栋,et al."不同管理模式下干旱草地粒度特征".土壤 49.6(2017):1243-1253.