Mutrágyahatások vizsgálata tritikále monokultúrában homoktalajon

Translated title of the contribution: Fertilizer effects in a triticale monoculture on sandy soil

I. Kádár, P. Ragályi

Research output: Contribution to journalArticle

Abstract

The effect of mineral fertilization on the development, yield and element uptake of triticale was studied between 2006 and 2013 in the 36th-43rd years of a long-term NPK fertilization experiment set up on calcareous sandy soil at the Experimental Station of the Institute for Soil Sciences and Agricultural Chemistry in Orbottyán. The soil of the experimental area was poorly supplied with macroelements (N, P, K), and the ploughed layer contained around 1% CaCO3 and 1% humus. The subsoil was strongly calcareous, with a clay content of 5-10%. The groundwater was located at a depth of 8-10 m and the area was prone to drought. Each year the P (0, 60 and 120 kg P2O5·ha-1) and K (0, 100, 200, 300 and 400 kg K2O·ha-1) fertilizers were applied in autumn prior to ploughing, while half the N (0, 80, 160 kg N ha-1) was applied in autumn and the other half in spring, in the form of 25% calcium ammonium nitrate, 18% superphosphate and 50% potassium chloride. The main conclusions drawn from the results were as follows: - In response to soil-enriching PK fertilization the very poor PK supply level of the control soil rose into the satisfactory 150-200 mg·kg-1 NH4-acetate+EDTA-soluble range by the 41st year of the experiment (in 2011). Fertilization with superphosphate led to a significant increase in the S and Sr contents of the topsoil, which could be attributed to the use of a Hungarian product containing Kola phosphate. Hungarian superphosphates contain around 18-22% elemental Ca, 13% S, 7-8% P and 1-2% Sr. - Not only is the sandy soil extremely heterogeneous, but the yields achieved on it also exhibit extreme deviations. Differences of an order of magnitude were found between the years and treatments. The annual means differed by as much as five times, so there were pronounced year effects. Yield depression may occur due to both drought/water deficit and excessive rainfall. - The P, Mn and Sr contents of the plant organs rose parallel with the P supplies, while the quantity of Zn incorporated declined. P-Mn synergism and P-Zn antagonism could be observed. The Mo concentration dropped to a third in the straw and to half in the grain as the NPK fertilizer rates increased. - Eight years of analysis is not sufficient to judge how suitable triticale is for cultivation in a monoculture, but this could be possible in the future by means of comparison with the 52-year continual rye experiment also carried out in Orbottyán.

Translated title of the contributionFertilizer effects in a triticale monoculture on sandy soil
Original languageHungarian
Pages (from-to)283-294
Number of pages12
JournalAgrokemia es Talajtan
Volume63
Issue number2
DOIs
Publication statusPublished - 2014

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Soil Science

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