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[1]LIAO Chaolin,FU Lingyi,ZHANG Pengbo,et al.Assessment and Spatial Variation of Soil Fertility Indices in Tobacco Field After Land Consolidation in Central-Southern Hunan Province[J].Research of Soil and Water Conservation,2017,24(02):105-111.

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Assessment and Spatial Variation of Soil Fertility Indices in Tobacco Field After Land Consolidation in Central-Southern Hunan Province

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 24 Number of periods: 2017 02 Page number: 105-111 Column: Public date: 2017-04-28

Title:: Assessment and Spatial Variation of Soil Fertility Indices in Tobacco Field After Land Consolidation in Central-Southern Hunan Province

Author(s):: LIAO Chaolin¹, FU Lingyi¹, ZHANG Pengbo¹, SHENG Hao¹, YU Qingtao², ZOU Kai², ZHANG Yangzhu¹; 1. College of Resources and Environment, HNAU, Changsha 410128, China;
2. Shaoyang Municipal Tobacco Corporation, Shaoyang 422000, China

Keywords:: land consolidation; tobacco field; fertility indices; spatial variation

CLC:: S153.6

DOI:: -

Abstract:: It is significant to explore soil nutrient features in tobacco field for fertilizer application and soil quality improvement in land consolidation area. The assessment and spatial variation of soil fertility indices in tobacco field after land consolidation had been explored based on a combination of geostatistics with GIS. The results showed that soil pH was relatively lower, most of soils were lacking organic matter (OM) and available nitrogen (AN) as well as potassium; all of soil fertility indices belonged to middle-grades variability and variation coefficients decreased in the order:available phosphorus (AP) > available (AK) > AN > OM > total phosphorus (TP) > total potassium (TK) > pH. Soil OM and AK were well described by exponential model, and the fitting semi-variance model for soil TK and AN was Gaussian, and the best matching effect of soil pH, TP, TN and AP was the spherical model. The results of semi-variance analysis showed that the nugget/still ratios of soil OM, TK, AN were 0.903,0.998 and 0.823, respectively, and their spatial correlations were relatively weak, the nugget/still ratios of soil pH, TN, TP and AP ranged from 0.501 to 0.724, and their spatial correlations were relatively middle. The range of different soil fertility indices varied from 99 to 1 003 m, and the values of TK and AN were the maximum and minimum, respectively. Meanwhile, its kriging map differentiated each other, such as pH embodied spotted type, AN and TK showed stripped pattern, however, TP had the type of increasing gradient distribution from the northern area to the southern area.

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