Influence of different grassland management on changes in chemical composition, organic matter digestibility and energy content of forage
2007
Stybnarova, M.,Agroresearch, Ltd., Vikyrovice (Czech Republic) | Pozdisek, J.,Agroresearch, Ltd., Vikyrovice (Czech Republic) | Svozilova, M.,Vyzkumny Ustav pro Chov Skotu, Vikyrovice (Czech Republic) | Varekova, P.,Vyzkumny Ustav pro Chov Skotu, Vikyrovice (Czech Republic) | Latal, O.,Agroresearch, Ltd., Vikyrovice (Czech Republic)
The aim of this study was to evaluate the effects of cutting intensity and fertilization of permanent grassland on forage chemical composition, organic matter digestibility and energy content (ME, NEL). A long-term small plot trial was established with four levels of cutting intensity and four levels of fertilization as follows: no fertilization, P30K60, N90P30K60, N180P30K60. The nutritive value was estimated on the basis of Wende analysis and in vitro organic matter digestibility (OMD). ME and NEL as well as OMD decreased significantly with the dicrease of the cutting frequency. The values varied also slightly according to the year. Thus, average values for NEL were 5.8 g/kg DM in 2003 and 5.46 g/kg DM in 2005 in intensive utilization (IU), whereas it was 5.22 g/kg DM in 2003 and 4.77 g/kg DM in 2005 in extensive utilization (EU). OMD average values were 68.73% (2003) and 66.19% (2005) in IU vs. 61.61% (2003) and 59.48% (2005) in EU. In conclusion, frequent cutting and fertilizer application significantly influenced fodder quality.
显示更多 [+] 显示较少 [-]