西北农林科技大学资源环境学院, 陕西杨凌,712100
纸质出版:2015
移动端阅览
楚万林, 齐雁冰, 常庆瑞, 等. 秦巴山地县域土壤碱解氮空间变异与合理采样数的确定[J]. 水土保持通报, 2015,35(2):141-146.
CHU Wanlin, QI Yanbing, CHANG Qingrui, et al. County-scale Spatial Variability of Soil Available Nitrogen Distribution and Determination of Reasonable Sampling Density in Qinba Mountains[J]. Bulletin of Soiland Water Conservation, 2015, 35(2): 141-146.
楚万林, 齐雁冰, 常庆瑞, 等. 秦巴山地县域土壤碱解氮空间变异与合理采样数的确定[J]. 水土保持通报, 2015,35(2):141-146. DOI: 10.13961/j.cnki.stbctb.2015.02.027.
CHU Wanlin, QI Yanbing, CHANG Qingrui, et al. County-scale Spatial Variability of Soil Available Nitrogen Distribution and Determination of Reasonable Sampling Density in Qinba Mountains[J]. Bulletin of Soiland Water Conservation, 2015, 35(2): 141-146. DOI: 10.13961/j.cnki.stbctb.2015.02.027.
[目的
]
了解秦巴山地县域土壤碱解氮的空间分布规律
确定合理的采样密度
为研究区农田养分管理提供科学依据。[方法
]
运用地统计学与GIS结合的方法
随机抽取不同采样密度的样点数据
进行插值分析
采用交叉验证法对插值精度进行评价。[结果
]
(1)土壤碱解氮的变异系数为42.95%
属于中等变异;(2)块金值与基台值的比值约为1/2
具有中等强度的空间相关性
空间最大相关距离为9171 m;(3)样点数目从1060个到742个时
变程以及块金值与基台值之比出现明显偏差
其相对误差分别为152.32%和36.1%
均方根误差(RMSE)、相关系数(R)同样出现明显偏差。[结论
]
汉滨区土壤碱解氮空间连续性较好
适当地减少采样密度
仍可以满足插值分析的需要
考虑到土壤碱解氮的空间变异评价的精度分析结果
县域土壤碱解氮的合理采样数应该控制在1060个以上
即最大以345.5 hm
2
为一个采样单元。
[Objective] Research on the county-scale spatial variability of soil available nitrogen(AN) and determination of reasonable sampling density in order to provide scientific knowledge for nutrient management in the Qinba mountain areas.[Methods] Sampling schemes with different sample intensities were simulated by extracting data from an AN database of intensive samples
and then made the spatial interpolation analysis of AN based on geostatic combined on GIS technology
and the interpolation accuracy was evaluated by the cross validation method.[Results] (1) The content of AN showed moderate variation with the coefficient of 42.95%; (2) The moderate spatial variability of the AN was found with the ratio of Nugget and Sill of about 1/2 and the maximum spatial self-related distance of 9 171 m; (3) Significant changes were detected when sample number reduced from 1 060 to 742
meanwhile
great changes were found of variation distance and the ratio of Nugget and Sill with the relative errors of 152.32% and 36.1%
and the root mean square error (RMSE) and relative coefficient changed significantly.[Conclusion] The range of the AN in Hanbin District was longer than other regions
so spatial continuity was better. It is possible to reduce the number of sample points to satisfy the need of the research regarding spatial variability of AN. Taking the results of spatial prediction accuracy into consideration
more than 1 060 samples should be the suitable number to evaluate the spatial variability of AN on county scale
and the maximum sampling unit is 345.5 hm2.
鲍士旦.土壤农化分析[M].北京:中国农业出版社, 2000.
Gascuel-Odoux C, Boivin P. Variability of variograms and spatial estimates due to soil sampling:A case study[J]. Geoderma, 1994, 62(1):165-182.
De Gruijter J, Brus D J, Bierkens M F P, et al. Sampling for Natural Resource Monitoring[M]. Springer, 2006.
刘杏梅.基于GIS和地统计学的不同尺度水稻田土壤养分时空变异及其机理研究[D].浙江 杭州:浙江大学,2005.
阎波杰,潘瑜春,赵春江.区域土壤重金属空间变异及合理采样数确定[J].农业工程学报,2008,24(2):260-264.
姚荣江,杨劲松,姜龙.黄河三角洲土壤盐分空间变异性与合理采样数研究[J].水土保持学报,2007,20(6):89-94.
Webster R, Welham S J, Potts J M, et al. Estimating the spatial scales of regionalized variables by nested sampling, hierarchical analysis of variance and residual maximum likelihood[J]. Computers & Geosciences, 2006, 32(9):1320-1333.
李艳,史舟.地统计学在土壤科学中的应用及展望[J].水土保持学报,2003,17(1):178-182.
政权.地统计学及在生态学中的应用[M].北京:科学出版社,1999.
郭鑫.罗江县农田土壤全氮协同克里格插值和采样数量优化研究[J].安徽农业科学,2012,40(5):2756-2760.
孙义祥,吴传洲,朱克保,等.插值方法与样点数对县域土壤有效磷空间变异特征评价的影响[J].应用生态学报,2009,20(3):673-678.
陈光,贺立源,詹向雯.耕地养分空间插值技术与合理采样密度的比较研究[J].土壤通报,2008,39(5):1007-1011.
姚丽贤,周修冲,蔡永发,等.不同采样密度下土壤特性的空间变异特征及其推估精度研究[J].土壤,2004,36(5):538-542.
郭旭东,傅伯杰,马克明.基于GIS和地统计学的土壤养分空间变异特征研究[J].应用生态学报,2000,11(4):557-563.
王淑英,路苹,王建立,等.北京市平谷区土壤有机质和全氮的空间变异分析[J].北京农学院学报,2008,22(4):21-25.
杨奇勇,杨劲松,刘广明.土壤速效养分空间变异的尺度效应[J].应用生态学报,2011,22(2):431-436.
雷咏雯,危常州,李俊华,等.不同尺度下土壤养分空间变异特征的研究[J].土壤,2004,36(4):376-381.
张继光,陈洪松,苏以荣,等.喀斯特地区典型峰丛洼地表层土壤水分空间变异及合理取样数研究[J].水土保持学报,2006,20(2):114-118.
龚绍琦,黄家柱,李云梅,等.太湖梅梁湾水质参数空间变异及合理取样数目研究[J].地理与地理信息科学,2006,22(2):50-54.
鲁如坤.土壤农业化学分析方法[M].北京:中国农业科技出版社,2000.
徐建华.计量地理学[M].北京:高等教育出版社,2006.
代丽娜,甘海华,卢瑛,等.样点数对县域土壤养分空间变异特征评价的影响[J].广东农业科学,2012,39(6):71-74.
张宏伟,魏忠义,王秋兵.沈阳城市土壤全钾和碱解氮的空间变异性[J].应用生态学报,2008,19(7):1517-1521.
赵业婷,李志鹏,常庆瑞.关中盆地县域农田土壤碱解氮空间分异及变化研究[J].自然资源学报,2013,28(6):1030-1038.
赵倩倩,赵庚星,姜怀龙,等.县域土壤养分空间变异特征及合理采样数研究[J].自然资源学报,2012,27(8):1382-1391.
王坷,许红卫,史舟.土壤钾素空间变异性和空间插值方法的比较研究[J].植物营养与肥料学报,2000,6(3):318-322.
郭熙,黄俊,谢文,等.山地丘陵耕地土壤养分最优插值方法研究:以江西省渝水区水北镇为例[J].河南农业科学,2011,40(2):76-80.
薛正平,杨星卫.土壤养分空间变异及合理取样数研究[J].农业工程学报,2002,18(4):6-9.
张忠启,于法展,李保杰.土壤碱解氮空间变异与合理采样点数量研究[J].水土保持研究,2013,20(2):66-68.
谢宝妮,常庆瑞,秦占飞.县域土壤养分离群样点检测及其合理采样数研究[J].干旱地区农业研究,2012,30(2):56-61.
Kerry R, Oliver M A. Average variograms to guide soil sampling[J]. International Journal of Applied Earth Observation and Geoinformation, 2004, 5(4):307-325.
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