干旱区生态环境知识资源中心(Arid): 开垦对盐渍化弃耕地土壤团聚体含量及稳定性的影响

Arid

	开垦对盐渍化弃耕地土壤团聚体含量及稳定性的影响
其他题名	Change in Content and Characteristics of Soil Aggregates after Reclamation of Derelict Salinized Land
	王卫超; 冯欢; 王巍琦; 桑文; 张凤华
来源期刊	土壤通报
ISSN	0564-3945
出版年	2016
卷号	47 期号:2 页码:327-333
中文摘要	以新疆玛纳斯河流域盐渍化弃耕地为对象,研究人为开垦5年后土壤团聚体及其稳定性变化,进而评价开垦对土壤团聚体特性的影响。结果表明:盐碱弃耕地开垦后增加了大团聚体数量;干筛数据表明,开垦前后各土层0.25~0.053 mm粒径团聚体所占比例均最高,占总量的35.50%~47.32%,与其他各粒径差异显著(P< 0.05);湿筛数据表明,团聚体多在0.053 mm以下,占总量的27.09%~64.50%;干、湿筛数据均表明,开垦后0~5 cm,5~10 cm和10~20 cm土层土壤大于0.25 mm团聚体所占的比例(R_(0.25))、平均重量直径(MWD)和几何平均直径(GMD)较弃耕地均有显著提高,随着土层深度的增加呈先增加后减小的趋势;弃耕地开垦后各土层土壤的分形维数(D)较开垦前均有所降低,且随着土层深度的增加分形维数(D)值呈先减小后增大的趋势,表明开垦后土壤团粒结构变好,稳定性增强,尤其是在0~20 cm土层表现更为明显。干旱区盐渍化弃耕地人工开垦结合合理的管理措施,有利于土壤大团聚体的增加和土壤结构的稳定。
英文摘要	Understanding soil aggregate stability is crucial for ecological restoration of abandoned fields, especially in arid areas. The objective of this study was to quantify changes in soil aggregation and assess soil aggregate stability after the reclamation of derelict salinized land for five years in the Manas River Valley of Xinjiang. The quantity of large aggregates obtained by dry sieving increased after reclamation. The mass of 0.25-0.053 mm aggregate accounted for 35.50%-47.32% of the total soil mass and was significantly greater than that of the other size class aggregates (P < 0.05) after reclamation. Soil mass was mainly distributed in the < 0.053 mm size class (27.09%-64.50%). Data from both dry sieving and wet sieving indicated that the macroaggregate content (R_(0.25)), mean weight diameter (MWD), and geometric mean diameter (GMD) in the 0-5 cm, 5-10 cm, and 10-20 cm depths were significantly greater in the reclaimed soil than in the original soil. After reclamation, the fractal dimension (D) decreased as soil depth increased. In contrast, R_(0.25) exhibited the opposite trend. This indicated that aggregate structure and stability was improved significantly after reclamation, especially in the 0-20 cm depth. When reasonable management practices were used, reclamation could increase macroaggregation and aggregate stability in the derelict salinized land in arid areas.
中文关键词	盐碱弃耕地 ; 开垦 ; 团聚体 ; 分形维数 ; 干旱区
英文关键词	Derelict land caused by salinization Reclamation Aggregate Fractal dimension
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:5716411
来源机构	石河子大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235071
作者单位	石河子大学, 新疆兵团绿洲生态农业重点实验室, 石河子, 新疆 832003, 中国
推荐引用方式 GB/T 7714	王卫超,冯欢,王巍琦,等. 开垦对盐渍化弃耕地土壤团聚体含量及稳定性的影响[J]. 石河子大学,2016,47(2):327-333.
APA	王卫超,冯欢,王巍琦,桑文,&张凤华.(2016).开垦对盐渍化弃耕地土壤团聚体含量及稳定性的影响.土壤通报,47(2),327-333.
MLA	王卫超,et al."开垦对盐渍化弃耕地土壤团聚体含量及稳定性的影响".土壤通报 47.2(2016):327-333.