黑龙港平原东北部土壤养分空间变异特征
首发时间:2019-04-09
摘要:为研究黑龙港平原东北部冬小麦-夏玉米轮作区土壤养分的空间变异规律,本文以河北省黑龙港平原东北部17个县为研究区,选取与冬小麦-夏玉米生产相关性高的土壤养分有机质、全氮、有效磷、速效钾、缓效钾为研究对象,基于GIS技术,分析了研究区内土壤养分空间变异特征。研究表明:有机质、全氮、速效钾、缓效钾均属中等变异性,有效磷属强变异性。土壤养分的块基比值范围为5.44%~48.15%,其中有机质、全氮、有效磷、速效钾具有强烈的空间相关性,缓效钾具有中等空间相关性。在此基础上进行土壤养分相关性分析,可知有机质与有效磷正相关性不强,有效磷与缓效钾之间负相关性不强,此外,有机质、全氮、有效磷、速效钾、缓效钾之间均呈极显著的正相关性,这说明不同土壤养分的含量会对土壤其它养分含量的空间变异造成影响。有机质含量在空间分布上较为零散,基本呈现由西向东递减的规律;全氮和缓效钾高值区零星分布在西部、东部,低值区分布在北部、南部;有效磷和速效钾高值区均分布在西部、北部和东部,大体呈环状分布,并向中部递减;总体来看,研究区大部分区域土壤养分含量较为均匀适当。
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Spatiotemporal Variation Characteristics of Soil Nutrients in the Northeast of Hei long-gang Plain
Abstract:For the study of the black dragon harbor northeast plain winter wheat and summer corn rotation District soil nutrient spatial variation law, this paper takes the black dragon harbor 17 county in the northeast plain in Hebei province as the research area and selecting high correlation with winter wheat - summer maize production of soil nutrients, organic matter, total n, available p, available k and slowly available potassium as the research object, based on GIS technology, analyzing the characteristic of the study area soil nutrient spatial variation .Research showed that organic matter, total nitrogen, available potassium, slowly available potassium are medium variability, effective phosphorus is a strong variability .Soil nutrient block base ratio in the range of 5.44% ~ 48.15%, the organic matter, total n, available p, available k has strong spatial correlation, slowly available potassium medium spatial correlation. On the basis of correlation analysis of soil nutrients, known organic matter and effective phosphorus is correlation is not strong, negative correlation between the effective phosphorus and slowly available potassium is not strong, in addition, organic matter, total n, available p, available k and slowly available potassium were significantly positive correlations between, it shows that different soil nutrient content will affect other soil nutrient content of space mutation. In the spatial distribution of the organic matter content is relatively fragmented, basic shows the law of diminishing from west to east; High total nitrogen gentle k value area scattered in the west, the east, low-value area distribution in the northern and southern; Effective phosphorus and available potassium is high value areas are distributed in the west, north and east, generally assumes the circular distribution, and central to decline; Overall, most of the area in the study area soil nutrient content is relatively uniform properly.
Keywords: Hei long-gang plain Soil nutrients Spatial variation Nutrient levels
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