Professional paper

PLANT NUTRIENT CAPACITY OF SOILS AT VRANA VALLEY

Lepomir Čoga ; Agronomski fakultet Sveučilište u Zagrebu, Zavod za ishranu bilja, Zagreb, Hrvatska
Mirjana Herak Ćustić ; Agronomski fakultet Sveučilište u Zagrebu, Zavod za ishranu bilja, Zagreb, Hrvatska
Tomislav Ćosić ; Agronomski fakultet Sveučilište u Zagrebu, Zavod za ishranu bilja, Zagreb, Hrvatska
Vesna Jurkić ; Agronomski fakultet Sveučilište u Zagrebu, Zavod za ishranu bilja, Zagreb, Hrvatska
Sanja Slunjski ; Agronomski fakultet Sveučilište u Zagrebu, Zavod za ishranu bilja, Zagreb, Hrvatska
Milan Poljak ; Agronomski fakultet Sveučilište u Zagrebu, Zavod za ishranu bilja, Zagreb, Hrvatska
Marko Petek ; Agronomski fakultet Sveučilište u Zagrebu, Zavod za ishranu bilja, Zagreb, Hrvatska
Ivan Šimunić ; Agronomski fakultet Sveučilište u Zagrebu, Zavod za poljoprivredne melioracije, Zagreb, Hrvatska
Dragica Radman ; Agronomski fakultet Sveučilište u Zagrebu, Zagreb, Hrvatska

Abstract

Soil fertility control, as the first step towards achieving the goal of optimal and harmonious nutrition of vegetable crops, was applied on 730 ha open areas of «Vrana» d.o.o. in 2004, on four localities: Jankolovica, Jasen, Sokoluša i Tinj (550, 106, 30 i 44 ha) and 6 ha greenhouses. with the aim to determine the chemical properties and plant nutrient capacity of the soils, which would be used to recommend soil fertilization with organic and mineral fertilizers.
Results of chemical analyses showed that the soils are of neutral to alkaline reaction (pHKCl 7.1 – 7.8), richly to very richly supplied with humus (4.2 – 16.0 %) and total nitrogen (0.22-0.65 %). Very poor to poor soil phosphorus supply (<10 mg/100 g) was determined by the AL-method in 90 % soil samples from Jankolovica locality, in all samples from Jasen locality and in 40 % samples from Tinj locality. Soil supply of potassium was moderate to very rich in 92 % samples from Jankolovica and in 68 % samples from Jasen, and very rich in 80 % samples from Tinj. Available lime levels are very high (14–49 % CaO), which may cause problems in the uptake of magnesium, phosphorus, and microelements. Since the studied soils are rich in potassium and lime, and poorly supplied with phosphorus, it is recommendable to abandon the established fertilization with NPK fertilizers. The majority of production areas should be fertilized with particular phosphorus fertilizers.

Keywords

fertility control; vegetable crops; fertilization

Hrčak ID:

176012

URI

https://hrcak.srce.hr/176012

Publication date:

4.9.2006.

Article data in other languages: croatian

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