干旱区生态环境知识资源中心(Arid): 黑河中游绿洲麦田土壤水气热参数田间尺度空间分布特征

Arid

	黑河中游绿洲麦田土壤水气热参数田间尺度空间分布特征
其他题名	Characteristics of spatial distribution of soil water-air-heat parameters in typical oasis croplands at middle reaches of Heihe River
	王卫华 1; 王全九 2; 武向博 1; 王铄 1
来源期刊	农业工程学报
ISSN	1002-6819
出版年	2013
卷号	29 期号:9 页码:94-102
中文摘要	为了明确黑河中游绿洲麦田土壤水气热传输动力学特征的空间变异性,该文采用地理信息系统和地统计学相结合的方法,以黑河中游临泽县麦田的水气热参数的空间分布特征为基础进行相关研究。结果表明地统计学方法可以较好地模拟土壤水气热参数的空间结构和变异特征;水气热参数的拱高与基态值之比均高于75%,采样间隔距离设为10 m可以达到较为理想的研究目标;Kringing插值研究结果表明,该区域土壤水气参数变化具有良好的一致性;总的来说,研究区域的土壤导热率具有中间高,南北两侧低的马鞍形变化趋势。该研究将为当地土壤水气热参数田间尺度空间变异研究提供一定的参考。
英文摘要	Using statistical methods for a study on the spatial variations of soil properties has become one of hot topics in the study of soil science. Due to the deep research on the spatial variation of soil hydraulic parameters, and the lack of research on the dynamic characteristics of soil air and heat transfer, we cannot compare the spatial variation characteristics of soil, water, air, and heat transfer kinetic parameters. As the interaction between the soil and the environment as well as the precise regulation of farmland soil moisture, air and heat condition problem is receiving more and more attention, the numerical model used to study the soil moisture, air and heat transport process, effectiveness and its impact on crop growth and ecological environment has gradually become a reality. But model accuracy depends largely on the accuracy of soil, water, air, and heat transfer kinetic parameters. Thus, seeking a simple and feasible method of determining the thermal dynamic parameters of soil moisture is the focus of research around the world. In order to define the dynamiccharacteristics of water conductivity、air permeability and heat conductivity’s spatial variability, this paper examines the spatial variation of the above parameters in Linze County, an agricultural area in the middle reaches of the Heihe River Basin. PL-300 soil air permeability measurement and soil heat pulse meter were applied to measured soil air permeability and thermal conductivity. In this paper, we designed an experiment of four levels of moisture content and took the average of three replications. Hydraulic conductivity is measured by qdisc infiltration instrument, each measuring point design four suction head, based on a spatial analysis function of GIS, The results showed as follows: 1) simulate the spatial structure and variability of the water, air, and heat parameters using land statistics of a wheat field. The optimal fitting model for saturated hydraulic conductivity, air permeability, thermal conductivity are an exponential model, the sum of squared residuals are small, nearly zero, and the determination coefficient R2 reached more than 80%. The results show that the statistical method can better simulate the spatial structure and variation characteristics of soil moisture air and thermal parameters. Fractal dimension (D) was close to 2, illustrating that soil water conductivity, air permeability and heat conductivity have strong spatial variation characteristics in this region. 2) Saturated hydraulic conductivity, air permeability and heat conductivity’s C / (C +C0)>75%, had a strong degree of spatial autocorrelation in the study scale. Recommend sampling distances of hydraulic conductivity, air permeability and heat conductivity both are 10m. And sampling distances of the other soil physical parameters are recommend to be 4m. 3) Kringing interpolation results show that soil water and gas parameters change was having a certain degree of consistency, Thermal conductivity has certain regional characteristics in the study area. The higher the moisture content, bulk density and the greater the sand content are, the greater the thermal conductivity is, and the thermal conductivity has certain regional characteristics. Among the soil, thermal conductivity is high, the north and south were on both sides of the lower tendency in the saddle. The research will be for the local soil moisture, air and thermal parameters field scale space mutation research to provide a certain reference basis.
中文关键词	土壤 ; 水分 ; 热传递 ; 饱和导水率 ; 导气率 ; 导热率 ; 地统计学 ; 空间变异
英文关键词	soils,moisture,heat transfer,soil water conductivity air permeability heat conductivity geostatistics spatial variability
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:4833698
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/229885
作者单位	1.西安理工大学水利水电学院, 西安, 陕西 710048, 中国; 2.西安理工大学水利水电学院, 黄土高原土壤侵蚀与旱地农业国家重点试验室, 西安, 陕西 710048, 中国
推荐引用方式 GB/T 7714	王卫华,王全九,武向博,等. 黑河中游绿洲麦田土壤水气热参数田间尺度空间分布特征[J],2013,29(9):94-102.
APA	王卫华,王全九,武向博,&王铄.(2013).黑河中游绿洲麦田土壤水气热参数田间尺度空间分布特征.农业工程学报,29(9),94-102.
MLA	王卫华,et al."黑河中游绿洲麦田土壤水气热参数田间尺度空间分布特征".农业工程学报 29.9(2013):94-102.