›› 2017, Vol. 29 ›› Issue (8): 1329-1335.DOI: 10.3969/j.issn.1004-1524.2017.08.14

• Environmental Science • Previous Articles     Next Articles

Study on spatial variability of soil available nutrients in tobacco planting soil in Yanyuan County

XIAO Yi1, FENG Lang1, WANG Peng2, ZHANG Xin3, LI Qiquan1, *, WANG Yong4, CHEN Yulan4, LUO Lin4, WANG Changquan1   

  1. 1. College of Resources, Sichuan Agricultural University, Chengdu 611130, China;
    2.Raw Material Department of Cigevette Factory in Hanyang District, Wuhan City, Wuhan 430051, China;
    3. The People‘s Government of Junlian Town, Junlian County, Yibin 645250, China;
    4. Liangshan Company of Sichuan Provincial Tobacco Co., Ltd, Liangshan 615000, China
  • Received:2017-03-24 Online:2017-08-20 Published:2017-09-06

Abstract: In order to reveal the spatial distribution of available nutrients in tobacco planting soils and the influence of previous crops, 273 soil samples were collected in tobacco-growing areas in Yanyuan County, and inverse distance weighting was adopted in combination with variance analysis. It was shown that the concentration of soil available N (AN), available P (AP) and available K (AK) ranged from 22.75 to 158.54, 1.25 to 68.90 and 34.37 to 362.59 mg·kg-1, respectively, and the variation coefficient of AN, AP and AK ranged from 29.17% to 77.04%. The spatial variability of AN, AP and AK was obvious. The concentrations of AN, AP and AK were mainly in the appropriate level, while the areas with lower AN, AP and AK were small, which were scattered plaques. The former crops had significant effects on soil AN and AP, yet no significant effect on AK in the study area. The average value of soil AN, AP and AK was the lowest when the previous crop was tobacco, which were 77.00, 13.15and 126.39 mg·kg-1 respectively. The average value of soil AP and AK was the highest when the previous crop was Vicia villosa, which was 27.06 and 170.41 mg·kg-1, respectively. The average value of soil AN was the highest when the previous crop was rice, which was 97.97 mg·kg-1.

Key words: spatial variability, available nutrients, inverse distance weighting, previous crops

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