陈涛,常庆瑞,刘钊,赵业婷,刘京.耕地土壤有机质与全氮空间变异性对粒度的响应研究[J].农业机械学报,2013,44(10):122-129.
Chen Tao,Chang Qingrui,Liu Zhao,Zhao Yeting,Liu Jing.Spatial Variability Response of Farmland Soil Organic Matter and Total Nitrogen to Sampling Grain Size[J].Transactions of the Chinese Society for Agricultural Machinery,2013,44(10):122-129.
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耕地土壤有机质与全氮空间变异性对粒度的响应研究   [下载全文]
Spatial Variability Response of Farmland Soil Organic Matter and Total Nitrogen to Sampling Grain Size   [Download Pdf][in English]
  
DOI:10.6041/j.issn.1000-1298.2013.10.020
中文关键词:  土壤有机质  土壤全氮  采样粒度  空间变异性
基金项目:国家高技术研究发展计划(863计划)资助项目(2013AA102401)、“十二五”国家科技支撑计划资助项目(2012BAH29B04)和高等学校博士学科点专项科研基金资助项目(20090204120035、20120204110013)
作者单位
陈涛 西北农林科技大学 
常庆瑞 西北农林科技大学 
刘钊 西北农林科技大学 
赵业婷 西北农林科技大学 
刘京 西北农林科技大学 
中文摘要:为有效揭示土壤空间变异性的尺度效应,为土壤采样设计提供科学依据,以黄土台塬区耕地土壤有机质(SOM)和全氮(STN)为例,利用空间自相关、半方差函数及分形维数分析了不同采样粒度条件下土壤属性的空间结构变化规律。结果表明,研究区耕地SOM和STN的平均质量比分别为14.79 g/kg和0.78 g/kg;随采样粒度增大,SOM变异系数基本未变,STN则表现总体增加;其空间自相关性减弱,由随机因素所引起的空间变异性逐渐增强,导致结构变异比重趋于减小;SOM和STN空间异质性随粒度的变化并非简单线性关系,而表现出先增后减的倒U型变化。耕地SOM和STN的空间分布呈北高南低,SOM含量总体中等偏下,而STN含量较低,耕作时应适当增加氮素补充。
Chen Tao  Chang Qingrui  Liu Zhao  Zhao Yeting  Liu Jing
Northwest A&F University;Northwest A&F University;Northwest A&F University;Northwest A&F University;Northwest A&F University
Key Words:Soil organic matter  Soil total nitrogen  Sampling grain size  Spatial variability
Abstract:To effectively reveal scale effect of soil attributes and provide information for sampling design, the spatial variability response rules of soil organic matter and total nitrogen to sampling grain size were identified by spatial autocorrelation, semi-variogram and fractal dimension in Loess Plateau, China. The results showed that the average content of SOM and STN were 14.79 g/kg and 0.78g/kg, respectively. With the sampling grain size increasing, the coefficient of variation of SOM had basically not changed, but that of STN showed a gradually elevated trend. In addition, the spatial autocorrelation of SOM and STN was weakened and their spatial variability from random factors became much stronger. Meanwhile, the relationship between spatial variability and sampling grain size was not linear, but a reverse “U” type changing trend. The spatial distribution of SOM and STN concentration exhibited higher in the north and lower in the south of study area. SOM content was at the mid-low level, but STN content was under the normal level which led to much more nitrogen needed in the future. 

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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