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[1]ZHANG Zeyu,LI Zhanbin,LI Peng,et al.Spatial Variability of Soil Nitrogen and the Impact Factors of Land-Use Types in Yujiehe Watershed, Han River[J].Research of Soil and Water Conservation,2017,24(04):46-52,58.

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Spatial Variability of Soil Nitrogen and the Impact Factors of Land-Use Types in Yujiehe Watershed, Han River

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 24 Number of periods: 2017 04 Page number: 46-52,58 Column: Public date: 2017-08-28

Title:: Spatial Variability of Soil Nitrogen and the Impact Factors of Land-Use Types in Yujiehe Watershed, Han River

Author(s):: ZHANG Zeyu¹, LI Zhanbin^1,2, LI Peng¹, XU Guoce¹, ZHANG Tiegang¹; 1. Base of Eco-hydraulic Engineering in Arid Area, Xi’an University of Technology, Xi’an 710048, China;
2. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China

Keywords:: soil nitrogen; land use; composition of nitrogen; correlation; Han River

CLC:: S151.9

DOI:: -

Abstract:: Nitrogen is an indispensable nutrient element in soil, and plays a vital role in the growth of plants. Grid sampling (30 m×30 m) and typical spot sampling were carried out in the study area, and soil samples were collected in three soil layers (0—20 cm， 20—40 cm， 40—60 cm). Total nitrogen (TN), ammonium nitrogen (AN) and nitrate nitrogen content (NN) were determined. With classical analyses, geostatistical analyses, kriging interpolation, Pearson correlation analysis and Spearman correlation analysis, spatial variability of TN, AN, NN of land-use types and their correlations with environmental factors were studied. In addition, the relationships between different fractions of nitrogen were investigated. The results showed that soil nitrogen contents of the study area were at the low level; the TN, AN, NN contents decreased as soil depth increased; the spatial variability coefficient of NN was greater than AN, and both of them were larger than TN; the spatial dependence of TN and NN appeared to be high level in A₁ layer and medium level in A₂, A₃ layers, and AN appeared moderate spatial dependence, which meant that the influence of human factors such as tillage on AN was greater than TN and NN, and it was the natural factor such as intrinsic properties of the soil and topography that controlled the distribution of TN and NN in A₁ layer. The TN, AN, NN storage of the study watershed in 0-60 cm layer were 17.116 t, 183.082 kg, 62.528 kg, repectively; and the contribution ratio to TN decreased in the order: grassland > forestland > cropland; the contribution ratio of cropland to AN was larger than both grassland and forestland; grassland proved to have the biggest contribution ratio to NN among the three land-use types. The mean of AN/TN decreased as soil depth increased in cropland, but rose in grassland, and decreased in the sequence: A₃ > A₁ > A₂; and the mean of NN/TN rose as soil depth increased in all the three land-use types. Pearson correlation analysis showed that AN/TN was highly significant positive correlated with NN/TN at a depth of 0—60 cm(r=0.440，p < 0.01); the correlations between different fractions of nitrogen were diverse in different layers and land-use types; Spearman correlation analysis indicated that nitrogen contents of cropland were mainly correlated with the soil particle size distribution, but was insignificantly correlated with topographic factors, nitrogen content of forestland had correlation with terrain factors. Therefore, increasing areas of forestland and grassland within the basin and the outlet can reduce the loss of soil nitrogen from catchment.

References:: [1] 邢顺林,刘毅,李世清.青藏高原与黄土高原土壤氮素矿化过程对温度变化的响应[J].西北农林科技大学学报:自然科学版,2011,39(1):151-158.
[2] 蔡贵信,朱兆良.水稻生长对土壤氮素矿化的影响[J].土壤学报,1983,20(3):272-278.
[3] 李世清,李生秀,邵明安,等.半干旱农田生态系统长期施肥对土壤有机氮组分和微生物体氮的影响[J].中国农业科学,2004,37(6):859-864.
[4] 杨小林,李义玲,朱波,等.紫色土小流域不同土地利用类型的土壤氮素时空分异特征[J].环境科学学报,2013,33(10):2807-2813.
[5] 张伟,刘淑娟,叶莹莹,等.典型喀斯特林地土壤养分空间变异的影响因素[J].农业工程学报,2013,29(1):93-101.
[6] 刘志鹏.黄土高原地区土壤养分的空间分布及其影响因素[D].北京:中国科学院研究生院,2013.
[7] 徐国策,李占斌,李鹏,等.丹江中游典型小流域土壤总氮的空间分布[J].地理学报,2013,67(11):1547-1555.
[8] 佘冬立,邵明安,俞双恩.黄土高原水蚀风蚀交错带小流域土壤矿质氮空间变异性[J].农业工程学报,2010,26(6):89-96.
[9] Leip A, Britz W, Weiss F, et al. Farm, land, and soil nitrogen budgets for agriculture in Europe calculated with CAPRI[J]. Environmental Pollution, 2011,159(11):3243-3253.
[10] Qi Y C, Dong Y S, Jin Z, et al. Spatial heterogeneity of soil nutrients and respiration in the desertified grasslands of Inner Mongolia, China[J]. Pedosphere, 2010,20(5):655-665.
[11] Cao C, Jiang S, Ying Z, et al. Spatial variability of soil nutrients and microbiological properties after the establishment of leguminous shrub Caragana microphylla Lam. plantation on sand dune in the Horqin Sandy Land of Northeast China[J]. Ecological Engineering, 2011,37(10):1467-1475.
[12] 鲁如坤.土壤农业化学分析方法[M].南京:河海大学出版社,2000.
[13] Xu W, Chen X, Luo G, et al. Soil organic carbon storage and its spatial distribution characteristic in the Sangong river watershed of arid region[J]. Journal of Natural Resources, 2009,24(10):1740-1747.
[14] Nielsen D R, Bouma J. Soil spatial variability[C]//Proceedings of a Workshop of the ISSS and the SSSA, Las Vegas(USA),30 Nov-1 Dec 1984. Pudoc., 1985.
[15] 徐少君,曾波,苏晓磊,等.基于RS/GIS的重庆缙云山自然保护区植被及碳储量密度空间分布研究[J].生态学报,2012,32(7):2174-2184.
[16] 杨艳丽,史学正,于东升,等.区域尺度土壤养分空间变异及其影响因素研究[J].地理科学,2008,28(6):788-792.
[17] Gao X J, Hu X F, Wang S P, et al. Nitrogen losses from flooded rice field[J]. Pedosphere, 2002,12(2):151-156.
[18] Zhao J, Liu H, Sui Y, et al. Analysis for spatial heterogeneity of organic matter content and available nutrients in blacksoil crop area with different scales[J]. Journal of Soil and Water Conservation, 2006,20(1):41-44.
[19] 丘华昌,陈家宙.旱地土壤的供氮潜力[J].植物营养与肥料学报,1995,1(2):33-39.
[20] 巨晓棠,刘学军,张福锁.不同氮肥施用后土壤各氮库的动态研究[J].中国生态农业学报,2004,12(1):92-94.
[21] 鞠敏睿.小兴安岭森林土壤氮形态研究[D].哈尔滨:东北林业大学,2010.
[22] 张玉树.农业管理方式对亚热带土壤氮转化过程的影响[D].南京:南京师范大学,2015.
[23] 赵彤,蒋跃利,闫浩,等.土壤氨化过程中微生物作用研究进展[J].应用与环境生物学报,2014,20(2):315-321.
[24] 李兆富,杨桂山,李恒鹏.西苕溪流域土地利用对氮素输出影响研究[J].环境科学,2006,27(3):498-502.

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