Izvorni znanstveni članak
INFLUENCE OF TILLAGE ON SOIL PROPERTIES, YIELD, AND FAT AND PROTEIN CONTENT IN THE GRAIN OF MAIZE
A. Špoljar
; Visoko gospodarsko učilište u Križevcima, Križevci, Hrvatska
Ivka Kvaternjak
; Visoko gospodarsko učilište u Križevcima, Križevci, Hrvatska
I. Kisić
; Agronomski fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
D. Marenčić
; Visoko gospodarsko učilište u Križevcima, Križevci, Hrvatska
Vesna Orehovački
; Visoko gospodarsko učilište u Križevcima, Križevci, Hrvatska
Sažetak
The influence of different tillage systems on soil properties and yields of maize grain (Zea mays L.) was investigated during 2008 on the experimental field of the College of agriculture in Križevci. The influence of tillage and soil properties on total fat and protein content in maize grain was also investigated. Mainly more positive effect of reduced tillage on physical soil properties was determined compared to more intensive systems of tillage. Positive correlations between fat and protein content and water capacity of soil were determined for
all investigated tillage systems. The highest correlation coefficient was
determined for protein content in tillage system B (r = 0.51; p<0.05), and for total fat content in system E (r = 0.56; p < 0.05). The higher values of soil air capacity also influenced a higher total fats content (significant for tillage variant D with the value r = 0.65; p < 0.01) and also a higher protein content (significant for tillage variant D with the value r = 0.63; p < 0.01). A negative impact of soil compactness on total fat content was also determined (significant for D variant with the value r = -0.77; p < 0.001) and on protein content
(significant for D variant with the value r = -0.51; p < 0.05) for almost all investigated tillage systems. Significantly lower values of humus content in the soil were registered for E variant (more intensive way of tillage) compared to other variants of tillage, except in relation to variant B (p < 0.05), while there were no significant differences between tillage systems related to total nitrogen
content in the soil. Positive correlations were determined between protein content and amount of humus in the soil (significant for B variant; r = 0.73; p <0.05) and mostly positive correlations between total fat content and amount of humus (p > 0.05). Similar correlations were determined between fat and nitrogen in maize grain (p > 0.05). Mostly negative correlations weredetermined between yields gained and content proteins in maize grain, and the
highest negative correlation coefficient was determined between total fat content in maize grain and yields of maize grain (p > 0.05). Significantly lower yields of maize grain were determined for variant A (reduced tillage) compared to other investigated variants of tillage (p < 0.05).
Ključne riječi
tillage systems; soil properties; fats; proteins; grain yield; maize
Hrčak ID:
64223
URI
Datum izdavanja:
21.1.2011.
Posjeta: 1.756 *