YIELD AND GRAIN QUALITY OF SPRING BARLEY AS AFFECTED BY SOIL TILLAGE, FERTILIZATION AND POST HARVEST RESIDUE PUBLISHEDEva CANDRÁKOVÁ, Milan MACÁK
During 2011-2012, the multifactorial field trial of spring barley variety Kangoo was established at Experimental site of Slovak Agricultural University in Nitra, in south-western Slovakia (E 18º09', N 48º19') with altitude of 175 m above MSL. The location has continental warm and moderate arid climate with an average annual temperature of 9.07°C an average annual precipitation of 561 mm. The mean temperature during the growing season is 16.2°C. The soil type is Orthic Luvisol with a loamy texture, medium humus content of 1.95%-2.60% and a pH of 5.7. There were studied the impact of two soil tillage systems (conventional - O1 and minimization - O3 tillage methods were used) and mineral and organic fertilization treatments (H1-zero treatments, H2- mineral fertilizers only, H3- application of both mineral fertilizers and post-harvest residues of the forecrop) on yield and quality parameters of spring barley variety Kangoo. The lack of humidity and above average temperatures reduced the harvest of grains of barley statistically in 2012 on 0.601 t ha-1 compared with the yield of spring barley in the year 2011 (3.63 t ha-1). The way of tillage highly significantly influences the yield of spring barley. Yield of spring barley under minimization methods was higher (3.48 t ha-1) with comparison to 3.19 t ha-1 yield in conventional tillage. The application of fertilizers and incorporation of maize aboveground residues as forecrop significantly create the better condition for yield of spring barley (3.84 t ha-1). The highly significant relationship between weather condition and quality of selected parameters were determined as follows: TKW (r=0.43++), volume weight (r=0.85++), percentage proportion of grains above 2.5 mm (r = 0.81++) and protein content in grain (r=0.87++). High direct relationship between the TKW and percentage proportion of grains above 2.5 mm seed (r=0.37+) and protein content (r=0.40+) were also determined. The same relationship between content of protein in grain and proportion of grains above 2.5 mm(r=0.70++) and between volume weight and proportion of grains above 2.5 mm (r=0.71++) were also determined. Variability of yield was statistically influence by all treatments – weather condition, tillage treatments and fertilization.
crop residues, fertilization, soil tillage, spring barley, yield