Naslov
Influence of tillage on soil properties, yields and protein content in grain of maize and soybean

Autori
Špoljar, Andrija ; Kvaternjak, Ivka ; Kisić, Ivica ; Birkas, Marta ; Marenčić, Dejan ; Orehovački, Vesna

Izvornik
Journal of Environmental Protection and Ecology (1311-5065) 10 (2009), 4; 1013-1031

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
tillage; proteins; grain yield; maize; soybean; soil properties

Sažetak
Influence of different tillage methods on soil properties, yield and protein content in maize (Zea mays L.) and soybean (Glycine hyspida L.) grain was investigated at the experimental station of the College of Agriculture at Krizevci (Republic of Croatia) in 2006 and 2007. In the two investigation years, an averagely higher moisture content at MPa 0.033 was determined in treatment E (more intensive tillage) and averagely higher humus content was recorded in treatment A (reduced tillage). The highest yield of maize grain was achieved by reduced tillage (treatment 13) and of soybean grain by more intensive tillage (treatment E). Correlation and regression relationships were also determined between some physical and chemical soil properties and grain protein contents of these crops. Significantly higher protein content in maize and soybean grain was recorded under more intensive tillage (treatment E) compared to other tillage methods studied (p<0.05). Very weak positive correlation was determined between soil water capacity at 0.033 MPa, maximum soil water capacity and protein content in maize grain, and a very weak negative correlation with particle packing density. These relationships are not statistically significant (p<0.05). No correlation was established between the studied soil physical properties and protein content in soybean grain. Positive correlations were determined between humus content and soybean grain protein content. Relationships between these variables are statistically significant (p<0.05). At this level of statistical significance, a positive correlation was determined between soil reaction, measured in I M KCl, and grain protein content of both crops. Positive correlation was found between total soil nitrogen and total protein content in soybean grain (p<0.01) and also between the same variables in maize grain (p<0.05). More intensive soil tillage, along with more favourable soil physical and chemical properties, has a beneficial effect on protein content in maize and soybean grain.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA