关中盆地县域农田土壤碱解氮空间分异及变化研究

doi:10.11849/zrzyxb.2013.06.013

摘要/Abstract

摘要：

论文以陕西省兴平市为例,采用2009年实测的耕层土壤碱解氮数据,运用地统计学结合GIS技术,建立其最佳半方差函数模型,分析关中盆地农田土壤碱解氮的空间特征、丰缺状况及其含量变化,为土壤培肥和农业生产提供理论基础。结果表明:研究区土壤碱解氮含量介于7.70~82.60 mg·kg^-1,多集中在30~40 mg·kg^-1,平均37.76 mg·kg^-1,较第二次土壤普查下降28.62%。在间距约300 m的采样尺度下,最优理论模型为指数模型,表现为弱的空间相关性,施肥管理、种植制度等随机因素起主导作用。含量高低区域分布明显,大致呈中间高四周低格局。72.67%的农田氮素缺乏,27.33%的农田氮素含量中等。近30 a,原土壤碱解氮1~3级农田区含量显著下降,原5、6级区有所改善,整体集中于4级水平。应进一步实地考察分析具体障碍因素,积极采取分区"补氮"措施。

关键词: 土壤碱解氮, 空间变异, 地统计学, 兴平市

Abstract:

With Xingping County in Shaanxi Province as the research site, geostatistics and Geographical Information System (GIS) were employed to establish the best semi-variance theory model and to study the spatial distribution, sufficiency and deficiency pattern, and content changes of soil alkali-hydrolyzable nitrogen (AN) at county scale based on the 1651 topsoil samples taken by "S-shaped" methods in 2009, so as to provide theoretic guidance for soil fertilization management and agricultural industry in Guanzhong Basin. The result showed that soil AN content in the study area ranged from 7.70 mg·kg^-1 to 82.60 mg·kg^-1, concentrated at the level of 30-40 mg·kg^-1 with an average of 37.76 mg·kg^-1 which decreased by 28.62% compared to that recorded in the 1980s. AN content satisfied the normal distribution after Box-Cox transformation (p=0.35) with Kolmogorov-Smironov (K-S) test. Under about 300-m sampling scale, soil AN demonstrated weak spatial dependence was mainly affected by human factors including fertilization, cropping systems and so on. There is obvious spatial difference in AN content distribution, which is shown as high in the center, while low in the surrounding areas. In the year of 2009, according to the abundant degree of soil AN content in Xingping County, 27.33% of farmland has proper AN content (40-60 mg·kg^-1), but as high as 72.67% (below 40 mg·kg^-1) is lack of AN. According to the Second Soil Alkali-hydrolyzable Nitrogen Classification Standard of Xingping, during the past 3 decades, the AN content in previous 1-3 grades farmland decreased sharply, but increased in the previous 5th and 6th grades farmland, and finally concentrated at the 4th grade. A total of 26.17% of the farmland AN content grade changed, of which 22.68% of the farmland decreased significantly. The decreasing trend of soil AN content might be attributed to the reducing of nitrogen fertilizer and incorrect agronomic measures. It is necessary to conduct further field survey to collect the key limiting factors where soil AN content was low or reduced sharply and take measures timely to increase soil AN content.

Key words: soil alkali-hydrolyzable nitrogen, spatial variability, geostatistics, Xingping County

中图分类号:

S153.6

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.

ZHAO Ye-ting, LI Zhi-peng, CHANG Qing-rui. Study on Spatial Variability and Change of Soil Alkali-hydrolyzable Nitrogen in Guanzhong Basin County-level Farmland[J]. JOURNAL OF NATURAL RESOURCES, 2013, 28(6): 1030-1038.

参考文献

[1] 崔晓阳. 东北森林氮素营养的生态学:土壤环境, 树种行为及氮营养生态位[M]. 哈尔滨:东北林业大学出版社, 1998.[CUI Xiao-yang. The Northeast Forest Nutrition Ecology: Soil Environment, Tree Species and Nitrogen Nutrient Niche Behavior. Harbin: The Northeast Forestry University Press, 1998.]

[2] 鲍士旦. 土壤农化分析[M]. 第三版. 北京:中国农业出版社, 2000.[BAO Shi-dan. Soil Agricultural Chemistry Analysis. The Third Edition. Beijing: China Agriculture Press, 2000.]

[3] 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.[YANG Qi-yong, YANG Jin-song, LIU Guang-ming. Scale-dependency of spatial variability of soil available nutrients. Chinese Journal of Applied Ecology, 2011, 22(2):431-436.]

[4] 李生秀, 李世清. 不同水肥处理对旱地土壤速效氮、磷养分的影响[J]. 干旱地区农业研究, 1995, 13(1):6-13.[LI Sheng-xiu, LI Shi-qing. The effects of different treatments with water and fertilizer on available N and P in dryland soil. Agricultural Research in the Arid Areas, 1995, 13(1):6-13.]

[5] 陕西省土壤普查办公室. 陕西土壤[M]. 西安:1992.[Shaanxi Soil Census Office. Shaanxi Soil. Xi'an: 1992.]

[6] 付莹莹, 同延安, 赵佐平, 等. 陕西关中灌区夏玉米土壤养分丰缺及推荐施肥指标体系的建立[J]. 干旱地区农业研究, 2010, 28(1):88-93.[FU Ying-ying, TONG Yan-an, ZHAO Zuo-ping, et al. The establishment of soil nutrient abundance and fertilizer recommendation index system for summer maize in Guanzhong Irrigation Areas, Shaanxi Province. Agricultural Research in the Arid Areas, 2010, 28(1):88-93.]

[7] 张振明, 宋思铭, 吴海龙, 等. 森林土壤碱解氮和全磷空间分布规律[J]. 东北林业大学学报, 2011, 39(5):77-80.[ZHANG Zhen-ming, SONG Si-ming, WU Hai-long, et al. Spatial distribution characteristics of available nitrogen and total phosphorus of forest soil. Journal of Northeast Forestry University, 2011, 39(5):77-80.]

[8] 吕国红, 周广胜, 周莉, 等. 盘锦湿地芦苇群落土壤碱解氮及溶解性有机碳季节动态[J]. 气象与环境学报, 2006, 22(4):59-63.[Lü Guo-hong, ZHOU Guang-sheng, ZHOU Li, et al. Seasonal dynamics of dissolved organic carbon and available N in Panjin reed wetland. Journal of Meteorology and Environment, 2006, 22(4):59-63.]

[9] 张兴义, 王树奎, 隋跃宇. 东北农田黑土碱解氮现状评价[J]. 农业系统科学与综合研究, 2005, 21(4):305-309.[ZHANG Xing-yi, WANG Shu-kui, SUI Yue-yu. Evaluation of alkali dispelled nitrogen of black soil in northeast China. System Sciences and Comprehensive Studies in Agriculture, 2005, 21(4):305-309.]

[10] 郭伟, 陈红霞, 张庆忠, 等. 华北高产农田施用生物质炭对耕层土壤总氮和碱解氮含量的影响[J]. 生物环境学报, 2011, 20(3): 425-428.[GUO Wei, CHEN Hong-xia, ZHANG Qing-zhong, et al. Effects of biochar application on total nitrogen and alkali-hydrolyzable nitrogen content in the topsoil of the high-yield cropland in north China Plain. Ecology and Environmental Sciences, 2011, 20(3):425-428.]

[11] 孔祥斌, 张凤荣, 王茹, 等. 基于GIS的城乡交错带土壤养分时空变化及格局分析——以北京市大兴区为例[J]. 生态学报, 2003, 23(11):2210-2218.[KONG Xiang-bin, ZHANG Feng-rong, WANG Ru, et al. GIS based analysis of spatial-temporal distribution of soil nutrients in a suburb region: A case study of the Daxing District in Beijing City. Acta Ecologica Sinica, 2003, 23(11):2210-2218.]

[12] 庞夙, 李廷轩, 王永东, 等. 土壤速效氮、磷、钾含量空间变异特征及其影响因子[J]. 植物营养与肥料学报, 2009, 15(1):114-120.[PANG Su, LI Ting-xuan, WANG Yong-dong, et al. Spatial variability of soil available N, P and K and influencing factors. Plant Nutrition and Fertilizer Science, 2009, 15(1):114-120.]

[13] 邹青, 赵业婷, 常庆瑞, 等. 黄土高原南部耕地土壤养分空间格局分析——以陕西省富县为例[J]. 干旱地区农业研究, 2012, 30(5):107-113.[ZOU Qing, ZHAO Ye-ting, CHANG Qing-rui, et al. Analysis of spatial pattern of soil nutrients in the cultivated land of southern Loess Plateau—A case study in Fuxian of Shaanxi. Agricultural Research in the Arid Areas, 2012, 30(5): 107-113.]

[14] 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.[ZHAO Qian-qian, ZHAO Geng-xing, JIANG Huai-long, et al. Study on spatial variability of soil nutrients and reasonable sampling number at county scale. Journal of Natural Resources, 2012, 27(8):1382-1391.]

[15] 王永东, 冯娜娜, 李廷轩, 等. 不同尺度下低山茶园土壤阳离子交换量空间变异性研究[J]. 中国农业科学, 2007, 40(9): 1980-1988.[WANG Yong-dong, FENG Na-na, LI Ting-xuan, et al. Study on the spatial variability of the soil cation exchange capacity in hilly tea plantation soils with different sampling scales. Scientia Agricultura Sinica, 2007, 40(9):1980-1988.]

[16] Andronikov S V, Davidson D A, Spiers R B. Variability in contamination by heavy metals: Sampling implications[J]. Water, Air and Soil Pollution, 2000, 120(1/2):29-45.

[17] 陕西省统计局. 陕西统计年鉴2010[M]. 北京:中国统计出版社, 2010.[Shaanxi Provincial Bureau of Statistics. Shaanxi Statistical Yearbook 2010. Beijing: China Statistical Press, 2010.]

[18] Webster R. Quantitative spatial analysis of soil in the field[J]. Advances in Soil Science, 1985(3):1-70.

[19] Goovaerts P. Geostatistics in soil science: State of the art and perspectives[J]. Geoderma, 1999, 89:1-45.

[20] 王政权. 地统计学及在生态学中的应用[M]. 北京:科学出版社, 1999.[WANG Zheng-quan. Geostatistics and Its Application in Ecology. Beijing: Science Press, 1999.]

[21] 农业部农民科技教育培训中心. 测土配方施肥技术[M]. 北京:中国农业科学技术出版, 2010.[Farmers' Science and Technology Education Training Center in Ministry of Agriculture. Soil testing and Formulated Fertilization Technology. Beijing: China Agricultural Science and Technology Press, 2010.]

[22] Cambardella C A, Moorman T B, Novak J M, et al. Field-scale variability of soil properties in central Iowa soils[J]. Soil Science Society of American Journal, 1994, 58(5):1501-1511.

[23] 邵立志. 基于GIS和地统计学的土壤养分空间变异特征及其空间插值方法研究——以陕西省蓝田县为例. 西安:西北大学, 2008.[SHAO Li-zhi. A Research on Soil Nutrient Spatial Variability Character and Space Interpolation Based on GIS and Geostatistics—Take Lantian County, Shaanxi Province as a Case. Xi'an: Northwest University, 2008.]

[24] 赵业婷, 常庆瑞, 陈学兄, 等. 县域耕地土壤速效磷空间格局研究——以武功县为例[J]. 西北农林科技大学:自然科学版, 2011, 39(3):157-162.[ZHAO Ye-ting, CHANG Qing-rui, CHEN Xue-xiong, et al. Study on the spatial pattern of available Potassium in county farmland—Wugong county as an example. Journal of Northwest A& F University: Natural Science Edition, 2011, 39(3): 157-162.]

[25] 咸阳市土壤普查办公室. 咸阳土壤[M]. 咸阳:1986.[Xianyang Soil Census Office. Xianyang Soil. Xianyang:1986.]

[26] 路鹏, 彭佩钦, 宋变兰, 等. 洞庭湖平原区土壤全磷含量地统计学和GIS分析[J]. 中国农业科学, 2005, 38(6):1204-1212.[LU Peng, PENG Pei-qin, SONG Bian-lan, et al. Geostatistical and GIS analysis on soil total P in the typical area of Dongting Lake Plain. Scientia Agricultura Sinica, 2005, 38(6):1204-1212.]

[27] 卢纹岱. SPSS统计分析[M]. 第4版. 北京:电子工业出版社, 2010.[LU Wen-dai. Statistical Analysis of SPSS. The 4th Edition. Beijing: Publishing House of Electronics Industry, 2010.]

[28] 汤国安, 杨昕. ArcGIS 地理信息系统空间分析实验教程[M]. 北京:科学出版社, 2006:363-421.[TANG Guo-an, YANG Xin. Geographic Information System Spatial Analysis Experiment Tutorial. Beijing: Science Press, 2006:363-421.]