The influence of the founding method and the fertilisation on the grassland harvest and its nutritive value
2001
Tamm, U. | Valgus, T. | Zirk, M. (Estonian Agricultural Univ., Tartu (Estonia))
The grassland complex experiment was performed on the mineral and peaty soils the founding methods being the reseeding after re-ploughing of the grass swards and the reseeding following the spraying herbicide 'Raundup'. The varying botanical composition (ryegrass and reed canarygrass and timothy-meadow fescue mixe) and the fertilising (non-fertilized, N, NPK) provised for the versatile assessment of the results. The results indicated no plausible differences between the grassland harvests as the consequence of the different founding methods. The grassland ryegrass herbage suffered winter damage and therefore provided for smaller harvest. In the absence of fertilisers the mineral soil yielded as the experiment's average 2.4 t ha sup(-1) DM. The nitrogen fertiliser (N160) increased the harvest 2.7 times and the complex fertiliser (N160, P22, K42) 3,3 times. On the peaty soil with no fertilisers the average harvest was 4.0 t ha sup(-1) DM. The effectiveness of the fertilisers was lower: the nitrogen fertiliser increased the harvest 1.2 times and the complex fertiliser 2 times. The nutritive value of the first cut fodder was on the mineral soil below 9 MJ kg sup(-1) DM due to the extensive utilisation, but higher on the peaty soil. The second cut grass had a better digestibility and higher nutritive value. The applied nitrogen dosages (N100+60) increased the harvest on the mineral soil, but had a little effect on protein content. On the peaty soil the grass had a high protein content and depended upon the used founding method
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