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Deng X.,Hunan Agricultural University | Deng J.,Hunan Agricultural University | Bin B.,Tobacco Monopoly Bureau of Shaoyang | Zhang G.,Tobacco Monopoly Bureau of Shaoyang | And 5 more authors.
Tobacco Science and Technology | Year: 2014

In order to investigate the spatial-temporal characteristics of organic matter contents in soil of Shaoyang tobacco growing areas and their relations with other soil nutrients, the organic matter contents, spatial distribution and evolution trend and their quantitative relation with other soil nutrients were analyzed by the methods of traditional statistics, geo-statistics, grouping-regression analysis and grey incidence analysis. The results were as follows: 1) The organic matter content in soil of Shaoyang tobacco growing areas was generally appropriate, it ranged from 10.20 to 70.90 g/kg with the mean value of 28.19 g/kg and the variation coefficient of 36.51%. 42.91% of the samples containing suitable organic matter for tobacco growth. 2) The organic matter content in soil of Shaoyang County was extremely significantly higher than that in Longhui County and Xinning County. 3) The organic matter content was patch-like distributed and generally reduced from the east and west towards middle part in Shaoyang. There was an area with higher organic matter content in the west part of Xinning County and another area in the east part of Shaoyang County. 4) The organic matter contents in soil was increasing over the years in general. 5) The contents of alkali-hydrolyzable nitrogen, available zinc, water-soluble chloride and available phosphorus significantly positively correlated to the organic matter content in soil. 6) The soil nutrients in the order of correlation with organic matter content in soil were alkali-hydrolyzable nitrogen > available zinc > water-soluble chloride > available phosphorus > available potassium> exchangeable magnesium> available boron. Source

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