Influencia de la densidad de árboles de Leucaena en la producción lechera y nitrógeno ureico en vacas F1 Gyr x Holstein

Facultad de Medicina Veterinaria y Zootecnica. Revista

L. M. Peñuela¹  R. D. Castañeda¹  R. M. Menjura¹ 

[1] Universidad del Tolima, Barrio Santa Helena Parte Alta, Ibagué – Colombia.

关键词: Cynodon nlemfluensis;    Leucaena leucocephala;    silvopastoral system;    tropical dry forest.;    bosque seco tropical;    Cynodon nlemfluensis;    Leucaena leucocephala;    sistemas silvopastoriles.;   

DOI  :  10.15446/rfmvz.v65n1.72022

学科分类：兽医学

来源: Universidad Nacional de Colombia * Facultad de Medicina

【 摘 要 】

The objective of this research was to evaluate the chemical composition, selectivity, partial intake, milk production and concentration of urea nitrogen in blood and milk in Gyr x Holstein dairy cows on silvopastoral systems with different densities ofLeucaena leucocephalatrees. The study was carried out in the Chaco Farm - department of Tolima - Colombia. The treatments were: T1:Cynodon nlemfluensispasture without trees; T2:C. nlemfluensis+ 1264 trees / ha of L. leucocephala; T3:C. nlemfluensis+ 4255 trees / ha ofL.leucocephala and T4:C. nlemfluensis+ 9899 trees / ha ofL. leucocephala . Four experimental periods of 32 days were evaluated and 16 F1 (Gy r X Holstein) cows were used. Differences (P <0.05) were observed in relation to the dry matter of bothC. nlemfluensisandL. leucocephala . There was high selectivity for grass (P <0.05). The dry matter intake decreased with the increase in the density ofL. leucocephalatrees in period 3, in the other periods no differences were observed (P> 0.05). As the density ofL. leucocephalatrees increased, the values of urea nitrogen in blood and milk increased (P <0.05). Milk production was not altered by treatments. It is concluded that F1 (Gyr X Holstein) cows in silvopastoral systems have a high selectivity and partial intake of grass, and higher levels of blood and milk urea nitrogen.

【 授权许可】

Unknown