Izvorni znanstveni članak
SECOND FODDER INTERCROP IN BEEF AND MILK PRODUCTION, SUNFLOWER (Helianthus annuss) AND HYBRID SORGHUM (Sorghum sp.)
Vinko Pintić
Marija Vukobratović
Nataša Pintić Pukec
Tatjana Jelen
Dean Marenčić
Sažetak
Increase of fodder production on cultivated acreages of the College of agriculture in Križevci, by introducing sunflower (Helianthus annuss) and hybrid sorghum (Sorghum sp., „Grazer“) as the second intercrop into the crop rotation has been studied. The second sowing of each intercrop was performed on four plots, each around 1000 m2. The preceding crop was common wheat and liquid manure was used as a preceding fertilizer with around 85 m3/1ha. The soil on all investigated plots was acid humus (humus 3.88%; pH in 1 M KCl 4.81), averagely very weak poor in physiologically active phosphorus (P2O5 4,39) and in potassium (K2O 6,57 mg/100g). Despite relatively unfavourable agroclimatic conditions during the vegetation (average monthly precipitation 49mm) average yield of sunflower green mass was satisfactory and amounted to 410 dt, dry matter 75 dt/1ha with average nutrient value
in 1kg of dry matter; digestible protein 65 gr., NEL 4.96 MJ and NEM 4.87 MJ. Determined average yield of hybrid sorghum green mass was 260 dt and dry matter 67 dt/1ha with average nutrient value, digestible protein 41 gr, NEL 4.79 MJ and NEM 4.60 MJ/1kg of dry matter. Average digestible protein content in dry matter of all investigated plots was significantly higher in sunflower (65 gr) than in hybrid sorghum (41 gr), P<0.05; P>0.01. Although higher values of average NEL and NEM content in 1kg of dry matter were determined in sunflower than in hybrid sorghum, the differences were not significant (P>0.05; P>0.01). Average sunflower yields of 38.400 MJ NEL and 37.703 MJ NEM per 1 ha were achieved on all plots, while determined hybrid sorghum yields were lower, 32.285 MJ NEL and 31.004 MJ NEM. Average yield of digestible protein per 1 ha was 486 kg for sunflower and hybrid sorghum significantly less than 276 kg. Based on determined results of sunflower grown as intercrop the yield of net energy per 1 ha presented in NEL and NEM, allows an average production of 10.971 kg of milk (around 3.5 MJ NEL/1kg) and 754 kg of beef (around 50 MJ NEM /1kg) and growing hybrid sorghum as an intercrop allows an average production of 9.224 kg of milk and 620 kg of beef.
Ključne riječi
sunflower; hybrid sorghum; crop rotation; milk; beef yield
Hrčak ID:
52069
URI
Datum izdavanja:
20.11.2009.
Posjeta: 1.021 *