[Effect of deferring the utilization period on quality and production of the Panicum maximum-Leucaena leucocephala association]
1996
Molina, J. | Faria Marmol, J. | Chirinos, Z.
A study was conducted in a commercial farm located at El Laberinto area, Zulia state, Venezuela (10 degrees 32' N, 72 degrees 12' W); in a sandy loam Alfisol with pH 5.2; 970.7 mm and 28 degrees C mean annual rainfall and temperature, respectively) to evaluate the effect of deferring the utilization period of a Panicum maximum + Leucaena leucocephala association on the dry matter production (DM), crude protein (CP) content, in vitro digestibility of the organic matter (IVDMO). A complete randomized block design with three replications was used to four treatments (days after a uniformity cutting on October 16); T1 = 42 (November 27); T2 = 84 (January 15); T3 = 112 (February 15); and T4 = 140 (March 15). The average DM production (Vha) increased (P less than or equal 0.01) as the deferral period increased until February 15 (Tr = 12.3; T2 = 17.19, and T3 = 17.88) with no significant increase thereafter (T4 = 18.16). The PC and digestibility of organic matter decreased (P less than or equal 0.01) with increasing the deferral period in both species; however, T3 (7.9 and 2.1 t/ha) and T4 (8.02 and 2.13 t/ha) produced a greater (P less than or equal 0.01) quantity of IVDMO and CP than T2 (7 09 and 2.02 t/ha) and T (3.02 and 0.86), respectively. Also, it was found that leucaena produced a greater (P less than or equal 0.01) quantity of digestible organic matter and CP than guinea grass in all treatment
显示更多 [+] 显示较少 [-]