Microsoft Word - 9--马渝欣_new_.doc

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1 土壤 (Soils), 2014, 46(4): 江淮丘陵区农田表层土壤有机碳空间变异以定远县为例 1,2 1* 2* ( ( ) ) GIS (0 ~ 20 cm) (SOC) 2011 SOC ( ) g/kg 33.12% SOC SOC SOC S153.6 (SOC) (0 ~ 20 cm)soc SOC [1] 30 SOC SOC [2 6] ( ) [7 8] SOC [9] SOC [10] [11] 5.7 hm t 1/4 28% [12] SOC ~ E ~ N km mm 16 ~ 348 m ( ) ( ) ( / ) ( / ) ( ) 37.8% 24.2% 9.92% 9.1% 2.78% (XDA ) (2008FY110600) * (dcli@issas.ac.cn lixusheng@nju.eu.cn) (1989 ) myx2007an@126.com. 1985

4 639 Google Earth 70 GPS 2011 6 7 2008 1 500 916 986 ( 1) 0 ~ 20 cm 1.5 ~ 2 kg (K 2 Cr 2 O 7 ) - SOC ( 2 ~ 0.02 mm 0.02 ~ 0.002 mm 0.002 mm) [13] 1.2.3 SPSS 17.0 SOC K-S GS+9.

2 4 639 Google Earth 70 GPS ( 1) 0 ~ 20 cm 1.5 ~ 2 kg (K 2 Cr 2 O 7 ) - SOC ( 2 ~ 0.02 mm 0.02 ~ mm mm) [13] SPSS 17.0 SOC K-S GS+9.0, γ(h)= 1 2 Var [Z (x + h) Z (x)] (1) γ(h) h h ARCGIS9.3 Geostatistics Kriging SOC 2 图 1 研究区采样点分布 Fig. 1 Sampling points in study area SOC g/kg g/kg, 33.12% [14] SOC (CV = 31.59%) SOC (CV = 37.51%) SPSS 17.0 表 1 SOC 描述性统计 (g/kg) Table 1 Statistical characteristics of SOC contents CV(%) K-S a b ab ab b ab SOC (P 0.05) 2.2 GIS SOC [14] GS+ SOC (R 2 ) (RSS) ( 2) SOC ( 2) 2 C 0 C 1 C 0 +C 1 a C 0 C 1 / (C 0 /(C 0 +C 1 )

640 46 表 2 SOC 含量半方差函数模型及参数 Table 2 Semivariance function model and parameters of SOC contents C 0 C 1 C 0 /(C 0 +C 1 ) a(km) R 2 RSS 982 0.01 0.09 0.10 6.3 0.947 4.39E-06 图 2 SOC 含量各向同性半方差函数 Fig.

3 表 2 SOC 含量半方差函数模型及参数 Table 2 Semivariance function model and parameters of SOC contents C 0 C 1 C 0 /(C 0 +C 1 ) a(km) R 2 RSS E-06 图 2 SOC 含量各向同性半方差函数 Fig. 2 Isotropic semivariogram of SOC contents <25% 25% ~ 75% >75% 2 SOC C C 0 / (C 0 +C 1 ) 10% 10% SOC a a 6.30 km 6.3 km [15] ( km) SOC [16 17] SOC SOC 2.3 lnsoc Kriging 12 SOC SOC SOC ( 3) 3 SOC 图 3 SOC 含量的分级图 Fig. 3 Classification of SOC contents SOC [18] SOC [19] 348 m SOC ( 4) 图 4 SOC 含量与海拔高度的关系 Fig. 4 Correlation between SOC content and altitude SOC [20 24] [25] SOC SOC 3

4 SOC (P 0.01) (P 0.01) 0.53 / SOC (1) SOC [26] SOC 79 ( 4) SOC 表 3 土壤颗粒组成与 SOC 含量的相关系数矩阵 Table 3 Correlation matrix between SOC contents and soil particle size fractions SOC 1 SOC 0.44 ** ** 0.31 * ** 0.81 ** 0.79 ** 1 ** P 0.01 * P 0.05 n = 70 表 4 定远县农田施肥情况 ( 小麦 - 水稻双季合计,kg/hm 2,n = 79) Table 4 Information of farmland fertilization in Dingyuan County (2) [27] SOC SOC SOC 30% [28] [29] % SOC 70% SOC 5 SOC 3 (1) SOC (10.96 ± 3.63) g/kg 33.12% SOC 6.3 km SOC (2) Kriging SOC 图 5 Fig. 5 定远县秋收作物 ( 水稻 ) 的秸秆还田情况 Rice straw-returning to field in Dingyuan County [1],,,,,. [J]., 2009(6): 1 8 [2],,,,. [J]., 2000, 55(5): [3],,,,,,,. : I [J]., 2010(6): [4]. [J]., 1999, 15(5): [5],,,. [J]., 2011, 30(9):

5 [6],,. [J]., 2006, 26(6): [7],,,,,,. [J]., 2008, 41(3): [8] Piao SL, Fang JY, Ciais P, Peylin P, Huang Y. The carbon balance of terrestrial ecosystems in China[J]. Nature, 2009, 458: [9]. [M]. :, 2011 [10],,,,. : [J]., 2010, 21(1): [11]. 2011[M]. :, 2011 [12],. 2011[M]. :, 2011 [13],. [M]. :, 2012 [14],,. [J]., 2005, 21(8): [15],,,. [J]., 2006, 39(4): [16],,,. [J]., 2007, 27(5): [17],,,. [J]., 2004, 10(1): [18],,,. [J]., 2004, 23(2): [19],,,,. [J]., 2008, 25(5): [20] Priess JA, Koning GHJde,Veldkamp A. Assessment of interactions between land use change and carbon and nutrient fluxes in Ecuador[J]. Agriculture Ecosystem and Environment, 2001, 85: [21] Dalal RC, Mayer RJ. Long-term trends in fertility of soil under continuous cultivation and cereal cropping in southern queensland, IV. Loss of organic carton from different densityfractions[j]. Australia Journal Soil Research, 1986, 24: [22] Burke IC, Yonker CM, Ponton WJ, Cole CV, Flach K, Schimel DS. Texture, climate, and cultivation effects on soil organic matter content in U S Grass-land soils[j]. Soil Science Society of America Journal, 1989, 53: [23] Hontoria C, Rodriguez Murillo JC, Saa A. Relationship between soil organic carbon and site characteristics in Peninsular Spain[J]. Soil Science Society of America Journal, 1999, 63: [24] Nichols JD. Relation of organic carbon to soil properties and climate in the southern Great Plains[J]. Soil Science Society of America Journal, 1984, 48: [25]. [D]. :, 2008 [26],,,,,,. [J]., 2012, 18(2) : [27],,,,,,. [J]., 2012, 24(8): 6 9 [28] Doran JW. Defining Soil Quality for a Sustainable Environment[M]. Wisconsin, USA: Soil Sci. Soc. Am., Inc., 1994: [29],,,,,. [J]., 2010, 21(2):

6 4 643 Spatial Variation and Influencing Factors of SOC Content of Tillage Layer in Jianghuai Hilly Region A Case Study of Dingyuan County, Anhui Province MA Yu-xin 1, 2, LI Xu-sheng 1*, LI De-cheng 2*, HAN Zhi-yong 1, ZHANG Gan-lin 2, ZHANG Zhao-dong 3, WANG Li-li 3 (1 School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing , China; 2 State Key Laboratory of Soil and Sustainable Agriculture(Institute of Soil Science, Chinese Academy of Sciences), Nanjing , China; 3 Soil and Fertilizer Station of Dingyuan County, Chuzhou, Anhui , China) Abstract: In this study the soil samples were collected from Dingyuan County of Jianghuai hilly region. The spatial distribution and variability of soil organic carbon (SOC) contents in 2011 were analyzed by using the means of statistics, geostatistics and geographical information system (GIS). The result showed that the SOC contents in the county ranged from 1.10 to g/kg with an average of g/kg, and the coefficient of variation was 33.12%, belonged to the moderate degree of variation. The SOC semivariance model was exponential model. Moreover, there was a strong spatial autocorrelation of SOC content. From east to west SOC contents decreased first then increased in spatial distribution, and soil particle size fractions and the straw returning to the field were the main factors that influenced the spatial variability of SOC. Key words: Soil organic carbon(soc), Spatial variability, Soil particle size fractions, Straw returning to field

Microsoft Word 李强.doc

Microsoft Word 李强.doc 土壤 (Soils), 2017, 49(3): 565 571 DOI: 10.13758/j.cnki.tr.2017.03.020 1 曲靖烤烟镁含量特征及其影响因素 1,2 2 2 2* 3 4 4 3 4 (1 410128 2 410128 3 655000 4 ( ) 650231) 3 506 4.10 g/kg (0.36 ~ 17.70 g/kg) 46.36%