Grazing Pressure on Beef and Grain Production of Dual‐Purpose Wheat in Argentina

Abstract

quality forage during the 3 to 4 mo of reduced forage production. Over the last two decades an increase in the The effects of three different grazing pressures on beef (Bos taurus) cropping area devoted to grain production has gradually and wheat (Triticum aestivum L.) grain production were studied at Pasman (Argentina) during a 3-yr study. Thirty hectares of the variety replaced pasturelands. Currently, owing to low profits 'Pincen' wheat were grazed with Angus heifers during 3 yr (1995)(1996)(1997) from grain crops, many farmers are attempting to reuntil apex differentiation. The different grazing pressures were obbuild their cattle stocks. Crops for grain and pastures tained through different stocking rates, adjusted every 21 d according compete for land use and make it more difficult to return to forage mass, predicted forage production rate, and an estimated to livestock production. forage allowance of 10, 15 and 20 kg dry matter (DM) heifer Ϫ1 d Ϫ1 The use of wheat as a forage and grain dual-purpose for high, medium, and low pressures, respectively. The three treat-(DP) crop is aimed at reducing competition between ments were randomly allocated within a complete block design with areas devoted to grain and forage crops. The income two replications. Every 21 d forage samples were clipped and forage stability of this system should be higher because both mass and plant composition were recorded and in vitro dry matter beef and wheat commodities are available for market digestibility (IVDMD), crude protein (CP), and neutral detergent fiber (NDF) were determined. Spike density and grain production

Nitrogen Fertilizer and Seeding Rate Influence on Grain and Forage Yield of Dual‐Purpose Barley

“…Despite the 25% grain yield penalty from forage removal in dual-purpose systems, economic analysis revealed considerably higher revenue in this system. The greater feasibility of dual-purpose systems compared with grain-only systems has been noted (Arzadun et al, 2003(Arzadun et al, , 2006Decker et al, 2009). Arzadun et al (2006) evaluated the increase of beef weight versus the decrease of wheat grain yield at increasing grazing pressures in a dual-purpose system and concluded that increased grazing pressure (grazing height from 7 to 3 cm) was profitable for farmers.…”

“…Some researchers have reported on the economic advantages of dual-purpose systems compared with grain-only systems (Arzadun et al, 2003(Arzadun et al, , 2006Decker et al, 2009). Th e dual-purpose system would be feasible if the forage value obtained is greater than any grain yield penalty from grazing/clipping.…”

Trigo de duplo propósito submetido ao pastejo de bovinos nos Campos Gerais do Paraná

“…Outros autores também observaram que a produtividade de grãos de trigo de duplo propósito é influenciada pela época de semeadura, pela intensidade de pastejo e pelo período de pastejo (Del Duca et al, 2000a;Arzadun, 2003;Berges, 2005).…”

Temperature Impact on the Forage Quality of Two Wheat Cultivars with Contrasting Capacity to Accumulate Sugars

“…Wheat is increasingly cultivated as a dual-purpose crop in several main wheat areas of the world, including the USA southern Great Plains [1,2], Australia [3,4], China [5] and the Argentinean Pampas region [6][7][8]. The reasons for this expansion are mainly the capacity of wheat to provide forage early in winter without excessively decreasing grain production.…”