Efecto de los descansos estacionales sobre los cambios en la composicion botanica de un pastizal natural y sobre la calidad de dieta de vacunos en pastoreo [Argentina].
1985
Hidalgo L.G.
Changes in total biomass, botanical composition and diet quality, in a native pasture (B community) of the Salado River Basin (Buenos Aires Province), under three grazing systems: spring-summer rest (SSR, November, December and January); fall rest (FR, April, May and June) and continuous grazing (CG), were evaluated. The total experimentation period considered was: October 1979 to August 1981. Total aerial biomass accounted in during SSR period was 3750 kg. DM ha-1. In the same period, warm season species biomass was increased, principaly Paspalum dilatatum and Bothriochloa laguroides. During FR treatment, total aerial biomass experimented no significant changes. However, cool-season (CS) species were promoted: Poa spp., Stipa spp. CG treatment determined a moderate grazed pasture with total aerial biomass oscillating around 2000 kg. DM ha-1 through the experimental period. Warm-season and cool-season species did not suffer damages. Also, Sporobolus indicus increased during this treatment. Anual and seasonal variations significantly conditioned the in vitro organic matter digestibility and nitrogen content values.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
المعلومات البيبليوغرافية
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