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, cilt.15, ss.295-300, 2006 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 15 Konu: 4
  • Basım Tarihi: 2006
  • Dergi Adı: FRESENIUS ENVIRONMENTAL BULLETIN
  • Sayfa Sayıları: ss.295-300

Özet

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).