Effect of Nitrogen Sources and Storage Method on Nitrate Content of Kale (Brassica Oleracea Var.Acephala Leaves

No Thumbnail Available
Abukutsa, M.O.
Chweya,l J.A.
Mochoge,l B.O.
Ooyango, J.C.
Journal Title
Journal ISSN
Volume Title
A study was conducted at Kabete Field Station, University of Nairobi, Kenya, to investigate the possible effects of nitrogen sources and storage on nitrate-nitrogen content in Kale leaves. Leaves from ‘plants that were top-dressed with calcium ammonium nitrate (CAN) accumulated more nitrate-nitrogen than those from those that were top-dressed with sulphate of ammonia (SA). Storage of leaves reduced nitrate-nitrogen concentration in the leaves, but the reduction was not accompanied with NO,-N accumulation. Storing leaves with petioles immersed in water reduced the nitrate-nitrogen concentration than storing the leaves on the shelf. Even though the refrigerated leaves may remain B9 fresh for a longer period than six days, no reduction of NOs-N during the refrigeration 33 period Occurred. The petioles prior to preparation of Kale leaves as human feed may reduce NOs-N concentration in the leaves.
East African Agricultural and Forestry Journal, 60 (No1& 2), p. 35-40