Mineral fertilization and grass productivity in a long-term field experiment

I. Kádár, Péter Ragályi

Research output: Contribution to journalArticle

Abstract

The effects of different N, P and K supply levels and their combinations were examined on the yield and element content of an established all-grass on a calcareous chernozem soil.(1) During the four years, the N alone produced 4.8 t ha -1, while the K gave 0.5 t ha -1 hay surplus. The N-fertilization lifted the hay mass four to five times compared to the N-control. The 200 kg ha -1 yr -1 N-dose was optimal. The 150 mg kg -1 AL-P 2O 5 and AL-K 2O supply satisfied the P and K demand of the grass. The rising N, P and K supply together increased the hay yield to its sevenfold.(2) Air dry hay yield surplus produced per 1 kg N was 33 kg in the 100 kg ha -1 yr -1 treatment.(3) The second cuts yielded less hay with higher element concentrations. The N, P, Cu content increased by 30-50% and Mo content by 200-500% in some cases. The phosphate/molybdate and nitrate/molybdate anion antagonism had negative effect on Mo uptake.(4) The Cu/Mo ratio showed great variability according to the N × P interactions and cuts. A long-term fertilization can drastically modify the element composition of the fodder, so its regular control by hay analysis seems to be reasonable.

Original languageEnglish
JournalArchives of Agronomy and Soil Science
Volume58
Issue numberSUPPL.
DOIs
Publication statusPublished - Oct 2012

Fingerprint

hay
grass
minerals
grasses
productivity
mineral
molybdates
surpluses
Chernozem
antagonism
fodder
calcareous soils
anions
field experiment
anion
nitrates
phosphate
forage
phosphates
nitrate

Keywords

  • all-grass
  • diagnostic criteria
  • hay yield
  • mineral elements
  • NPK fertilization

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Soil Science

Cite this

Mineral fertilization and grass productivity in a long-term field experiment. / Kádár, I.; Ragályi, Péter.

In: Archives of Agronomy and Soil Science, Vol. 58, No. SUPPL., 10.2012.

Research output: Contribution to journalArticle

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