Perspective management and utilisation of grassland in the Czech Republic
2008
Kohoutek, A., Crop Research Inst., Prague (Czech Republic). Research Station in Jevicko | Odstrcilova, V., Crop Research Inst., Prague (Czech Republic). Research Station in Jevicko | Pozdisek, J., Research Inst. for Cattle Breeding, Rapotín (Czech Republic)
Permanent grasslands in the Czech Republic (CR) cover the area of 950 000 ha, that is 22.2 % of agricultural land (4280 000 ha). In our paper we evaluate the influence of three cut frequencies performed at four sites of permanent grassland in CR at the standard level of fertilizing PKN90 on yield, quality and utilisation of fodder by cattle measured in terms of milk production. We carried out a model calculation of cattle herd size needed for farming utilisation of grasslands on the basis of exact results completed with accessible literary sources on fodder intake by cattle at the stated intensity. Dry matter production in the average of evaluated sites and treatments decreases from a two-cut to four-cut utilisation from 8.05 t.haE-1 to 6.42 t.haE-1 and calculated dry matter production for the model area of 500 000 ha of grasslands is 4025 000 t at the two-cut system, 3665 000 ha at the three-cut system and 3210 000 ha at the four-cut system. Hence, the cow herd size necessary for the conversion of feedable dry matter is 382 000 cows in the treatment without grain supplementation and extensive utilisation in form of a two-cut system, 306 000 in a three-cut system and 231 000 in a four-cut system, the difference between two and four cut frequencies is then 151 000 dairy cows. By this given number of suckler cows it is possible CR to manage 300 000 hectares of grassland at the all-year need of 4.5 t productive solid on 1 LU, providing that the forage from the grassland at the average long-time yield will be exclusive an all-year feed.
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