Acta Agriculturae Zhejiangensis ›› 2021, Vol. 33 ›› Issue (10): 1904-1912.DOI: 10.3969/j.issn.1004-1524.2021.10.14

• Environmental Science • Previous Articles     Next Articles

Evaluation on soil nutrients and heavy metals pollution risk in main producing areas of rapeseed in Hunan Province, China

XIONG Tinghao1(), HUANG Yiguo2, ZHOU Xuan3, LU Yanhong3, ZI Tao1, HU Yuqian1, SONG Haixing1,*()   

  1. 1. College of Resources & Environment, Hunan Agricultural University, Changsha 410128, China
    2. Hengyang Agricultural Science Institute, Hengnan 421101, China
    3. Soil and Fertilizer Institute of Hunan Province, Changsha 410125, China
  • Received:2020-12-25 Online:2021-10-25 Published:2021-11-02
  • Contact: SONG Haixing

Abstract:

In this study, 56 topsoil samples were collected from the main producing areas of rapeseed in Hunan Province, and the contents of main nutrients and available heavy metals in these samples were determined to reveal the spatial distribution characteristics of soil fertility, as well as heavy metals pollution risk. The results showed that the soils in the main producing areas of rapeseed in Hunan Province were mainly mild acid and weak acid, and the deficiency of organic matter, nitrogen, phosphorus, potassium, boron, sulfur and molybdenum was common. About half of the soil samples were deficient in calcium and magnesium, yet were rich in iron, manganese, copper and zinc. The soil comprehensive fertility was rated average. Among all the samples, the lightly, moderately and seriously cadmium polluted samples accounted for 16.1%, 1.8% and 1.8%, respectively, and no pollution risk of copper, zinc, lead and nickel was found. Therefore, organic matter, nitrogen, phosphorus, potassium, boron should be reasonably supplemented in the main producing areas of rapeseed in Hunan Province, and measures should be taken to reduce the availability of cadmium in certain areas.

Key words: main producing areas of rapeseed, soil nutrients, fertility evaluation, heavy metal

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