AN EFFICIENCY OF A TECHNOLOGY OF MULTI-COMPONENT STRIP SOWING OF PERENNIAL GRASSES IN SOD
A scheme of multi-component strip sowing of perennial grasses developed for increasing a period of production longevity with stable annual yield is given. This is due to the fact that grass seed with a short term of production longevity (Trifolium pretense) are sown on the plots of the strips of shorter length, and grass seed with a long one (Lotus corniculatus) - on the plots of the strips of greater length. Sowing since the very first year of productive usage will be highly productive thanks to the crop with a small period of such usage. At this sowing during the first three years of productive usage lotus corniculatus will not be oppressed and will develop normally and up to the fourth year the red clover productivity will decrease and be replaced by Lotus corniculatus. Experimental research was carried out in Kirov region, the grass stands with various values of correlation of alternating grass plots having been established for this objective. The experiments were conducted at the following mean values of grass stand: density at research start - 987 shoots per square metre, yield of 1.92 tons per hectare. Optimal value of ratio of plots of grass with stable annual gross yield: ratio should be in the range 2.0…2.1. Usage of multi-component strip sowing of perennial grasses allows increasing mean yield of grass stand by 40.1% in comparison with natural hayfields.