Dual purpose wheat production with different levels of nitrogen topdressing

Abstract

Currently, the practice of Crop-Livestock Integration is stimulated as a way of increasing the generation of foreign exchange for Brazil. Integrated systems improve land use efficiency as well as preserve, recover and increment or soil fertility. The aim of this research was to evaluate how different doses of nitrogen fertilization can affect production and quality of dual purpose wheat submitted to grazing. The experimental designed was randomized block with five treatments (0, 75, 150, 225 and 300 Kg N ha -1 , like ammonium nitrate) and four repetitions. The forage yield, the percentage crude protein (P=.0001) and acid detergent insoluble protein (P=.0054) had a linear increased because of the nitrogen addition doses. The crude protein percentage changed the estimate of all soluble carbohydrates (P=.0001) and non-fibrous carbohydrates (P=.0186), but did not influence the, nitrogen detergent fiber corrected with ash and proteins percentage contributing for content cell. The crops production (P=.0001) and the number of kernels per ear (P=.0001) showed significantly difference because of the nitrogen additions dose, increasing the number of fertile flowers. The nitrogen topdressing alters forage production, the chemical composition and the production of dual purpose wheat grains subjected to grazing. Key words: Meat. Fertility. Grain. Crop livestock integration. Milk. Pasture. ResumoAtualmente, é estimulada a prática de Integração Lavoura-Pecuária (ILP) como forma de incrementar a geração de divisas para o Brasil. Os sistemas integrados melhoram a eficiência de uso da terra, bem como preservam, recuperam e/ou incrementam a fertilidade do solo. Objetivou-se avaliar a produção e a composição bromatológica de trigo duplo propósito (TDP) manejado sob pastejo com diferentes doses de nitrogênio em cobertura (DAN): 0, 75, 150, 225 e 300 Kg de N ha -1 , sob a forma de nitrato

Grazed rain-fed small-grain cereals as a forage option for small-scale dairy systems in central Mexico

“…Juskiw et al (1991) assessed rye and triticale as monocultures associated with barley and observed a CP content over 190 g /kg DM for both cereals sown in the same season. WHT and TRT treatments had CP values similar to reports by Henz et al (2016) and Khorasani et al (1997).…”

Evaluation and characterization of triticale silage (x. Triticosecale wittmack) to replace Sorghum bicolor (L.) Moench (S. vulgare Pers.) silage as feed for beef cattle

“…Feed should contain a satisfactory concentration of proteins and nonfibrous carbohydrates (starch and soluble sugars), the latter being the most important source of energy produced in the rumen. This concentration stimulates the growth of bacteria and increases the production of microbial protein and volatile fatty acids necessary to induce the milk or meat response (Henz et al, 2016).…”

Ryegrass (<i>Lolium multiflorum</i>) BRS Ponteio and wheat (<i>Triticum aestivum</i>) BRS Tarumã pasture with different doses of ammonium sulfate as topdressing

“…Quatrin et al (2017) evaluated the same wheat cultivar with 130 kg N ha -1 as urea under grazing by lactating cows and verified a daily accumulation rate of 40.78 kg and a dry matter production of 4,143 kg. Henz et al (2016) evaluated BRS Tarumã managed with different doses of nitrogen as topdressing (0, 75, 150, 225 and 300 kg N ha -1 as urea) and grazed by lactating Holstein cows found that accumulation rate presented a quadratic upward trend with a maximum point close to treatment 150 and greater than 100 kg dry matter per day. The experiments mentioned, along with the results obtained in the present experiment demonstrate the ability of regrowth and production of wheat, but it is important to emphasize that the growth rates were changed exponentially with the different doses of nitrogen as topdressing.…”

“…However, some dual-purpose cultivars have been used only for grazing, due to the quantity and quality of the forage produced, which are due to the number of inputs applied and mainly the management. According to Henz et al (2016) the use of dual-purpose wheat for grazing allows for early cropping by minimizing and/or nullifying the effects of forage shortage in the fall.…”