Effect of Ammonium and Nitrate Nutrition on Hydrolytic Enzymes Activity of Scots Pine (Pinus sylvestris L.) Roots and Phosphorus Content in Shoots

1991

S. 127-136

17 Lit. Ang.

Unselbständiges Werk

200052486

One-year-old pine seedlings transferred from nursery were cultivated in unsterilized forest soil in a greenhouse. Various forms and levels of nitrogen in nutrient solutions resulted after 10 months in various growth and mycorrhizal development of the seedlings. Nitrogen fertilization stimulated enzyme activity of acid phosphatase, Alpha-galctosidase and Beta- glucosidase of roots and the cell-free acid phosphates in soil. Ammonium nitrogen was more fabourable for mycorrhizae develpment and the acid phosphatase activity in roots than nitrate supply. The phosphorus content was siginificantly higher in shoots of fertilized than of control seedlings.