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Application of Se-Fertilizer Affects Selenium Content, Cadmium and Lead Accumulation and Fruit Quality in Kiwifruits

LONG Youhua, ZHANG Cheng, WU Xiaomao, LI Ming, YAO Xue, SHAO Shuang   

  1. 1. College of Agriculture, Guizhou University, Guiyang 550025, China;
    2. Institute of Crop Protection, Guizhou University, Guiyang 550025, China
  • Online:2016-07-15 Published:2016-07-26

Abstract:

The aim of the present study was to evaluate the effect of exogenous selenium (Se) on Se content, cadmium (Cd)
and lead (Pb) accumulation, and internal quality of the kiwifruit cultivar ‘Guichang’. The kiwifruit plants growing under
conventional conditions were supplied with sodium selenite at 0.00, 1.25, 2.50, 5.00, 10.00 or 20.00 mg/kg in irrigation water
and organic fertilizer, respectively, via soil deep-ditch fertilization. The results showed that the application of exogenous
Se in both irrigation water and organic fertilizer could increase Se content, decrease Cd and Pb accumulation, and improve
fruit quality in kiwifruits. Moreover, the supplement of sodium selenite was more effective in organic fertilizer than in irrigation
water. With increasing amount of Se supplement, Se content in kiwifruits gradually increased and Cd and Pb contents in kiwifruits
sharply decreased. At sodium selenite dose levels of 1.25–10.00 mg/kg, the contents of vitamin C, soluble sugar, soluble solid
and dry matter were increased, and titratable acid was decreased in kiwifruit. Sodium selenite in organic fertilizer at dose levels of
5.00–10.00 mg/kg was recommended for cultivation of the kiwifruit cultivar ‘Guichang’. These findings might have practical
implications for the development of selenium-enriched kiwifruits and remediation of soil heavy metal contamination.

Key words: kiwifruit, organic fertilizer, selenium-enriched, Cd and Pb accumulation, quality

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