Effects of humic acid doses and aplication times on the plant growth, nutrient and heavy metal contents of lettuce grown on sewage sludge-applied soils

TUFENKCI S., TURKMEN O., SONMEZ F., ERDINC C., Sensoy S.

FRESENIUS ENVIRONMENTAL BULLETIN, vol.15, no.4, pp.295-300, 2006 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 15 Issue: 4
  • Publication Date: 2006
  • Journal Name: FRESENIUS ENVIRONMENTAL BULLETIN
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.295-300
  • Keywords: humic acid, application dose, application time, heavy metal, nutrient, sewage sludge, COMPOST, SUBSTANCES
  • Van Yüzüncü Yıl University Affiliated: Yes

Abstract

Effects of increasing doses of humic acid (HA), applied in different periods, on the plant growth, nutrient and heavy metal contents of lettuce grown on sewage sludge-applied soils were investigated. A constant dose of 20% sewage sludge (SS) was added to experimental soil placed in pots. Various doses of HA (0, 500, 1000, and 2000 mg kg(-1)) were applied to the pots for different time periods (0, 30, 60, and 90 days before seedling transplantation).