Spring barley overground biomass increase dynamics depending on sowing method and position in crops rotation system
2006
Wanic, M. | Michalska, M. | Treder, K.,University of Warmia and Mazury, Olsztyn (Poland). Dept. of Agricultural Systems
The influence of intercrop (Italian ryegrass) and different forecrops (potato, spring wheat and spring barley) on spring barley overground biomass increase and topsoil humidity on medium soil were studied for a period of 4 years (2001-04). The tested were carried every year during 5 development stages of barley, i.e. during seedlings formation, spreading, stems formation, heads formation and ripenning. The factors applied differentiated barley biomass during the period from spreading though the end of vegetation and the choice of forecrop showed a stronger influence than application of intercrop. The largest increases were found at the plot after potato as compared to both cereals (wheat and barley), particularly on the plot with intercrop. The sowing method (with intercrop or in pure crop field) was found insignificant as concerns biomass increases although more intensive accumulation of biomass was recorded in barley cultivated after potato during the period between stems formation and heads formation. Studies on soil humidity showed that intercrop of Italian ryegrass in barley resulted in an increase of water reserve during barley seedlings formation and decreased moisture content during stems formation comparing to the plots without the intercrop. Introduction of the intercrop had a balancing effect on soil humidity after all forecrops while in case of 'pure' barley plots (without intercrop) more favourable conditions developed on plots after potatoes
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