广元植烟土壤有效态微量元素的空间变异特征及影响因素

发布时间：2018-04-05 17:16

本文选题：土壤微量元素　切入点：空间变异　出处：《核农学报》2017年08期

【摘要】：为揭示广元植烟区土壤有效态微量元素含量空间变异特征及影响因素,采用地统计学、相关分析及回归分析等研究方法,结合地理信息系统(GIS)技术对研究区土壤有效铁、锰、铜、锌钼及硼等6种土壤有效态微量元素进行分析。结果表明,研究区土壤有效铁、锰及铜含量丰富,总体处于中等以上水平;有效钼含量适中;有效锌和硼缺乏,总体处于缺乏或极度缺乏水平。半方差分析表明,6种土壤有效态微量元素块金系数均在29.72%~67.59%之间,具有中等强度的空间自相关性,其空间变异受结构性因素和随机性因素共同影响。空间分布上,土壤有效铁、锰、铜及钼含量表现出北高南低的空间分布趋势,土壤有效锌和硼含量呈现出西高东低的空间分布格局。影响因素分析表明,6种土壤有效态微量元素与土壤有机质呈正相关,与p H值呈负相关,相关性总体高于地形因子。土壤有机质对有效铁、铜、锌及硼有极显著影响,其空间变异性为5.5%~27.2%。除有效锌外,土壤p H值对其余5种土壤有效态微量元素含量空间变异均有极显著影响,其空间变异性为5.0%~30.4%。土类对土壤有效铁、锰及铜有极显著影响,其空间变异性8.4%~12.3%。熟制和种植制度对6种土壤有效态微量元素含量空间变异的影响较弱,进一步说明研究区土壤有效态微量元素含量空间变异受结构性因素和随机性因素共同影响,但结构性因素的作用强于随机性因素。本研究结果为广元植烟区土壤微肥施肥管理及优质烤烟栽培提供了可靠的参考依据。
[Abstract]:In order to reveal the spatial variation characteristics and influencing factors of soil available trace elements in Guangyuan tobacco planting area, geostatistics, correlation analysis and regression analysis were used to study the soil available iron and manganese in the study area, combined with Geographic Information system (GIS) technology.The available trace elements of copper, zinc, molybdenum and boron were analyzed.The results showed that the contents of available iron, manganese and copper in the soil in the study area were abundant, and the content of available molybdenum was moderate, the content of available molybdenum was moderate, the content of available zinc and boron was deficient, and the content of available zinc and boron was deficient or extremely deficient.The semi-variance analysis showed that the gold coefficients of the six available trace elements were in the range of 29.72% and 67.59% respectively, with moderate spatial autocorrelation, and their spatial variability was influenced by both structural and random factors.The spatial distribution of available iron, manganese, copper and molybdenum in soil showed the trend of north high, south low, and soil available zinc and boron showed the spatial distribution pattern of west high and east low.The analysis of influencing factors showed that there was a positive correlation between soil available trace elements and soil organic matter and a negative correlation with pH value, which was generally higher than that of topographic factors.Soil organic matter had a significant effect on available iron, copper, zinc and boron, and its spatial variability was 5.5 and 27.2kb.Except for available zinc, soil pH value had a significant effect on the spatial variation of the other five soil available trace elements, and its spatial variability was 5.0% and 30.4%.Soil has a significant effect on soil available iron, manganese and copper, and its spatial variability is 8.4% and 12.3%.The effect of cropping system and planting system on the spatial variation of available trace elements in 6 soils was weak, which further indicated that the spatial variation of soil available trace elements in the study area was affected by both structural and random factors.But the effect of structural factors is stronger than that of randomness.The results of this study provided a reliable reference for soil micro-fertilizer fertilization management and cultivation of high quality flue-cured tobacco in Guangyuan tobacco planting area.
【作者单位】：四川农业大学资源学院;四川省烟草公司广元市公司;
【基金】：中国烟草总公司四川省公司科技项目(scyc201402006)
【分类号】：S153.6

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