Crops ›› 2022, Vol. 38 ›› Issue (2): 189-194.doi: 10.16035/j.issn.1001-7283.2022.02.026

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Spatial Variation Characteristics of Main Nutrients in Tobacco Planting Soil in Tongren City, Guizhou Province

Tan Zhiyong1(), Shen Xiaoxiong2, Liu Jie3,*(), Tan Daxin4, Bai Bin1, Zhou Xinghua3, Zhao Hui1   

  1. 1College of Economics and Management, Tongren University, Tongren 554300, Guizhou, China
    2College of Management Science and Engineering, Guizhou University of Finance and Economics, Guiyang 550025, Guizhou, China
    3Tongren Branch of Guizhou Provincial Tobacco Company, Tongren 554300, Guizhou, China
    4Agricultural and Rural Bureau of Linli, Linli 415200, Hunan, China
  • Received:2021-07-09 Revised:2021-10-01 Online:2022-04-15 Published:2022-04-24
  • Contact: Liu Jie E-mail:daydayupccc@163.com;25256757@qq.com

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Abstract:

Using GPS positioning technology, 202 tobacco planting soil samples were sampled and analyzed in Tongren, Guizhou province. The spatial variation characteristics of main nutrients in tobacco planting soil were studied by combining geostatistics and geographic information technology. The results showed that the contents of organic matter, alkaline hydrolyzable nitrogen, available phosphorus, and exchangeable potassium in tobacco planting soil were 5.47-59.81g/kg, 27.33-241.32mg/kg, 1.50-115.96mg/kg and 46.20-977.10mg/kg, respectively. The contents of organic matter and exchangeable potassium were rich, and the content of alkali hydrolyzed nitrogen was relatively high, so the application of corresponding fertilizer should be properly controlled. The content of available phosphorus in 33.70% of tobacco planting soil was higher than 30mg/kg. It was suggested that the application rate of phosphorus fertilizer should be properly controlled in these areas. The content of available phosphorus in 30.70% of tobacco planting soil was less than 15mg/kg. It was suggested that more phosphorus fertilizer should be applied in these areas to meet the needs of tobacco normal metabolism and quality formation. The spatial distribution of organic matter and alkali hydrolyzed nitrogen content in tobacco-growing soil in Tongren showed a certain correlation and both showed an increasing trend from east to west. In the vertical distribution, the contents of organic matter, alkali hydrolyzed nitrogen, and exchangeable potassium showed an extremely significant positive correlation with altitude.

Key words: Tongren city, Tobacco planting soil, Nutrient, Spatial variation

Fig.1

Distribution of soil sampling location"

Table 1

Classification standard of main nutrients of tobacco planting soil in Tongren"

指标Index 极低Lowest 低Lower 中等Medium 高Higher 极高Highest
有机质Organic matter (g/kg) ≤10 11~20 21~30 31~45 >45
碱解氮Alkali hydrolyzed nitrogen (mg/kg) ≤30 31~60 61~120 121~150 >150
有效磷Available phosphorus (mg/kg) ≤10 11~15 16~30 31~40 >40
交换性钾Exchangeable potassium (mg/kg) ≤80 81~150 151~220 221~350 >350

Table 2

Descriptive analysis of main nutrients of tobacco planting soil in Tongren"

指标
Index		 变幅
Range of
change		 均值±标准差
Mean±standard
deviation		 变异系数
Coefficient of
variation (%)		 分布频率Distribution frequency (%)
极低
Lowest		 低
Lower		 中等
Medium		 高
Higher		 极高
Highest
有机质Organic matter (g/kg) 5.47~59.81 27.13±7.80 28.75 1.00 11.40 59.80 24.30 3.50
碱解氮Alkali hydrolyzed nitrogen (mg/kg) 27.33~241.32 124.40±31.74 25.51 0.50 2.50 42.10 36.10 18.80
有效磷Available phosphorus (mg/kg) 1.50~115.96 28.13±21.24 75.51 18.30 12.40 35.60 12.40 21.30
交换性钾Exchangeable potassium (mg/kg) 46.20~977.10 342.01±168.56 49.29 2.50 8.90 12.40 35.60 40.60

Table 3

The semi variogram models of main nutrients and its corresponding parameters"

指标
Index		 模型
Model		 块金值
Nugget		 偏基台值
Partial sill		 基台值
Sill		 块金效应
Nugget
effect (%)		 标准化平均误差
Standardized
mean error		 标准化均方根误差
Standardized root
mean square error
有机质Organic matter 球状模型 42.70 21.35 64.05 66.67 0.002 1.027
碱解氮Alkali hydrolyzed nitrogen 球状模型 708.43 348.62 1057.05 67.02 -0.001 1.002
有效磷Available phosphorus 指数模型 0.32 0.21 0.53 60.38 -0.081 0.886
交换性钾Exchangeable potassium 球状模型 18805.26 10512.82 29318.08 64.14 0.025 0.941

Fig.2

Regional distribution of soil nutrients in Tongren"

Table 4

Correlation coefficients between main soil nutrients and altitude"

项目Item 有机质Organic matter 碱解氮Alkali hydrolyzed nitrogen 有效磷Available phosphorus 交换性钾Exchangeable potassium
海拔Altitude 0.296** 0.376** 0.095 0.275**

Fig.3

Smooth regression analysis of soil nutrients and altitude"

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