Changes in the botanical content and productivity of Lotus corniculatus L., Trifolium pratense L., Dactilus glomerata L., and Festuca pratensis Hund., planted as pure crop and in mixture
2001
Todorova, P. (Institut po Planinsko Zhivotnov"dstvo i Zemedelie, Troyan (Bulgaria))
During the period from 1991 to 1994 studies were carried out for tracing the changes in botanical content, productivity and nutritive value of grrass species trefoil, red clover, bur-reed and meadow fescue-grass sawed as pure crop and in mixture with 1:1:1:1 ratio of components for foothill regions of Central North Bulgaria.The heaves weeding was accounted in meadow fescuegrass of 38.07% in 1991 to 53.06% in 1994, and it was the weakest one for red clover - 14.70% and bur-reed - 14.395.At the imposed climatic conditions the highest fresh mass yield was formed by grass mixture - 5861 kg/dka.The highest dry matter yield was obtained from bur-reed - 1485.75 kg/dka.It was found that trefoil contained 23.63% crude protein, and from bur-reed was obtained the highest yield of crude protein - 283.03 kg/dka.The highest content of crude fiber was accounted for fescue-grass - 25.74%.The weeding rate, productivity of forage in the areas of light-gray, pseudo-podzolic and acid forest soils, that were weekly supplied with nutrients, depended on climatic conditions.
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