干旱区生态环境知识资源中心(Arid): 基于多重分形的半干旱区农田表层土壤粒径分布特征研究

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	基于多重分形的半干旱区农田表层土壤粒径分布特征研究
其他题名	Study on Particle Size Distribution Characteristics of Farmland Soil in Semi-arid Region Based on Multi-fractal
	王燕 1; 蒙仲举 1; 斯庆毕力格 2; 丁延龙 1; 王则宇 1; 万芳 1; 吴小龙 1
来源期刊	土壤
ISSN	0253-9829
出版年	2018
卷号	50 期号:4 页码:826-831
中文摘要	为探明农田因管理方式不同而导致的土壤粒径分布(PSD)差异,在阴山北麓农牧交错区选择典型莜麦留茬地、翻耕耙平地、翻耕不耙平地进行了研究。试验选择表层0~10 cm土壤为研究对象,运用多重分形理论分析探讨不同管理方式下土壤颗粒的分布特征及差异。研究结果表明:不同管理方式下研究区土壤颗粒组成中黏粒含量均极低,翻耕不耙平地和莜麦留茬地以粉粒和细砂为主,翻耕耙平地以粉粒和极细砂为主;广义维数谱D(q)为反S型递减函数,且D_0>D_1>D_2,多重分形谱f(q)为左勾状单峰曲线,Deltaalpha值在2.405 ~ 2.596,非均一性高,可用多重分形来表征土壤PSD特征;多重分形参数D_1、D_2同黏粒含量呈显著正相关关系,D_0/D_1与粉粒呈显著正相关关系,与砂粒成负相关关系,Deltaf反之;管理方式对土壤PSD及多重分形参数D_0、Deltaalpha、Deltaf有显著影响(P<0.05),对D_1、D_1/D_0、D_2、 a_0影响不显著。根据试验结果,建议当地农田在生产后进行留茬或秸秆覆盖处理,结合当地主风向选择适宜翻耕方式。
英文摘要	0-10 cm topsoils of the typical stubble field of hulless oat (SH), the ploughing and raking field (PR) and the ploughing field without raking (P) in the agro-pastoral transition zone of the north foot of Yinshan Mountain were taken as the targets, the characteristics and differences in soil particle size distributions (PSDs) under the three management patterns were analyzed by adopting the multifractal theory. The results showed that clay content is extremely low under all kinds of management patterns, P and SH patterns are dominated by silts and fine sands, while PR dominated by silts and very fine sands. The general dimension spectrum D(q) is the inverse S-shape decreasing function, and D_0>D_1>D_2; the multifractal spectrumf(q)is a unimodal curve like left hook-shape, with Deltaalphavalues ranged in 2.405-2.596, indicating a high degree of homogeneity, therefore multifractality could be used to describe the characteristics of PSD. D_1 and D_2, the multifractal parameters, are significantly positively correlated with clay content, D_0/D_1 is significantly positively correlated with silt content and negatively correlated with fine sand content, while Deltaf is on the contrary. Management pattern has significant effects on PSD and D_0, Deltaalpha and Deltaf(P<0.05),but has insignificant effect on D_1, D_1/D_0, D_2 and a_0. According to these results, it is suggest that the stubble should be left in farmland or be used to cover the farmland, and appropriate plough style should be chosen according to the local prevailing wind direction.
中文关键词	农田 ; 多重分形 ; 土壤粒径分布 ; 管理方式 ; 半干旱区
英文关键词	Farmland Multi-fractal Soil particle size distribution Management pattern Semiarid area
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:6322095
来源机构	内蒙古农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238413
作者单位	1.内蒙古农业大学沙漠治理学院, 呼和浩特, 内蒙古 010018, 中国; 2.鄂尔多斯市林业局, 鄂尔多斯, 内蒙古 017000, 中国
推荐引用方式 GB/T 7714	王燕,蒙仲举,斯庆毕力格,等. 基于多重分形的半干旱区农田表层土壤粒径分布特征研究[J]. 内蒙古农业大学,2018,50(4):826-831.
APA	王燕.,蒙仲举.,斯庆毕力格.,丁延龙.,王则宇.,...&吴小龙.(2018).基于多重分形的半干旱区农田表层土壤粒径分布特征研究.土壤,50(4),826-831.
MLA	王燕,et al."基于多重分形的半干旱区农田表层土壤粒径分布特征研究".土壤 50.4(2018):826-831.