Details

Autor(en) / Beteiligte

• RAGÁLYI, Péter
• KÁDÁR, Imre

Titel

NxP AND NxK INTERACTIONS ON GRASS YIELD AND MINERAL ELEMENT COMPOSITION

Ist Teil von

• Cereal research communications, 2008-01, Vol.36, p.79-82

Ort / Verlag

Akadémiai Kiadó

Erscheinungsjahr

2008

Link zum Volltext

Quelle

SpringerLink Journals

Beschreibungen/Notizen

• The effect of different N, P and K supply levels (low, satisfactory, high, extreme high) and their combinations were examined in the 31styear of a long-term fertilization experiment on the development, yield and mineral element content of a 4 years old established all-grass sward in 2004, with seed mixture of eight grass species. The trial was established on a calcareous chernozem soil. The soil of the growing site contained around 3% humus, 3–5% CaCO3, 20–22% clay in the ploughed layer and was originally moderately well supplied with available K, Mg, Mn, Cu and poorly supplied with P and Zn. The NxP fertilization rose 3-fold the hay yield. The „moderate” supply levels (135 mg kg-1AL-K2O and 153 mg kg-1AL-P2O5) basically satisfied the P and K demands of grass. Without a satisfactory P supply the efficiency of N fertilization was much lower and vice versa. As a function of rising NxP supply levels, the Mo content of hay in the 1st cut dropped from 1.0 to 0.3 mg kg-1, while in the 2ndcut hay from 4.5 to 0.4 mg kg-1. The Na content of the primary hay increased one order of magnitude with the increasing N-supply, while the K-fertilization reduced it to its 20%. The NxK interactions had negative effect on Na, Ca, Mg and B uptake.