| 福建县级区域耕地土壤养分时空变异研究 |
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| 引用本文： | 孔庆波,章明清,姚宝全,李娟,张青.福建县级区域耕地土壤养分时空变异研究[J].热带作物学报,2010,31(10):1686-1691. |
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| 作者姓名： | 孔庆波 章明清 姚宝全 李娟 张青 |
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| 作者单位： | 福建省农业科学院土壤肥料研究所;福建省农业科学院土壤肥料研究所;福建省农田建设与土肥技术总站;福建省农业科学院土壤肥料研究所;福建省农业科学院土壤肥料研究所 |
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| 基金项目： | 国家科技支撑计划项目，福建省农业科学院基金，国际植物营养研究所(IPNI)合作项目 |
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| 摘 要： | 运用地理信息系统和地统计学相结合的方法,研究福建沿海县级区域耕地土壤主要养分指标——有机质、碱解氮、速效磷、速效钾的空间变异规律,并按照肥力指标法对耕层土壤进行养分分级。结果表明,空间上,从县级区域耕层土壤分析,不同地块土壤养分含量变化差异大;空间变异结构也存在较大差异,晋江速效养分表现为结构性因素影响,而闽侯表现为结构性因素和随机性因素共同作用;建立了土壤养分空间分布图,分析其空间分布规律;按照肥力等级划分,该区域耕地氮素表现为部分区域缺乏,钾素大部分区域严重亏缺,磷素大部分区域盈余;时间上,以土壤速效磷为例,与20世纪80年代第2次土壤普查资料对照,其含量有所增长,从农田养分平衡角度也证实了该区域大部分耕地土壤累积磷素。
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| 关 键 词： | 土壤养分 时空变异 肥力等级 |
Temporal and Spatial Variability of Soil Nutrients in the County Scale of Fujian |
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| Zhang Mingqing,Zhang Mingqing,Yao Baoquan,Li Juan and Zhang Qing.Temporal and Spatial Variability of Soil Nutrients in the County Scale of Fujian[J].Chinese Journal of Tropical Crops,2010,31(10):1686-1691. |
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| Authors: | Zhang Mingqing Zhang Mingqing Yao Baoquan Li Juan and Zhang Qing |
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| Institution: | Soil and Fertilizer Institute Fujian Academy of Agricultural Sciences;Soil and Fertilizer Institute Fujian Academy of Agricultural Sciences;Fujian Cropland Construction and Soil and Fertilizer Station;Soil and Fertilizer Institute Fujian Academy of Agricultural Sciences;Soil and Fertilizer Institute Fujian Academy of Agricultural Sciences |
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| Abstract: | Based on nutrition analysis of top soils and to provide theoretic and practice support for precision fertilization in the county scale of Fujian, temporal and spatial variability characteristics of farmland soil nutrient(SOM, alkali hydrolysable N, available P, available K)content were studied employing geostatistics statistics and geographic information system(GIS). It was confirmed that the content of soil nutrient varied considerably in different lands. A contour map of nutrient content was obtained using ordinary Kriging interpolation in accordance with soil fertility grades. Alkali hydrolysable N was deficient in some regions. Heavy deficiency of available K and surplus of available P were observed in most regions. But compared with 1980, availability of P was enhanced. |
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| Keywords: | Soil nutrient Temporal and spatial variability Soil fertility grades |
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