Productivity and Nutritive Value of Tifton 85 in Summer, With and Without Irrigation Under Different Nitrogen Doses

Abstract

ABSTRACT:The pasture irrigation has expanded, mostly in small areas in order to boost the production system, along with the use of soil improvement techniques and high-productivity grasses. Thus, this study, carried out on a small dairy farm property, aimed to evaluate the productivity, botanical composition and nutritive value of Tifton 85 with different nitrogen (N) doses, in the presence and absence of irrigation. The experimental design was a randomized block in a split-plot design with four replications, plots Non-irrigated and Irrigated. The subplots consisted of nitrogen doses: 25 kg ha -1 cycle -1 of N, 50 kg ha -1 cycle -1 of N, 75 kg ha -1 cycle -1 of N and 100 kg ha -1 cycle -1 of N. The irrigation increased the productivity in an average of 3,626.5 kg ha -1 cycle -1 , with higher leaf stem ratio of 1.3, increasing the crude protein content of the pasture. The productivity responded quadratically to nitrogen fertilization with increases up to 84 kg N ha -1 cycle -1 with slight linear decrease of dead matter. There were linear increments of crude protein and digestibility "in vitro" of dry matter in function of applied nitrogen.

Application of swine wastewater for irrigation of Tifton 85 grass: Part I-productivity and nutritional quality

“…The presence of nitrogen positively influenced the TFP and LSP in the cycles (Fig 5.c, (Quaresma et al, 2011;Gomes et al, 2015b;Taffarel et al, 2016;Sanches et al, 2017). Sanches et al (2017) and Quaresma et al (2011) In relation to the SW doses applied in Tifton 85 grass ( Fig 4A), other authors have also observed the occurrence of increasing linear behaviour in dry matter yield.…”

“…However, this supplemental irrigation could no eliminate the seasonality (Sanches et al, 2015). In this sense, we highlight the Cynodons, which has presented excellent productive results with irrigation, attenuating the seasonality with good nutritional results, especially the Tifton 85 grass (Gomes et al, 2015b;Sanches et al, 2015Sanches et al, , 2016Sanches et al, , 2017.…”

“…Taffarel et al (2016) reported an increase of up to 13.8 kg day -1 of DM for each kg of applied N, in an experiment with nitrogen doses. Gomes et al (2015b) and Sanches et al (2017) observed increase of 31.4 and 62.1 Kg day -1 of DM in irrigated Tifton 85 with nitrogen use at doses of 60 and 75 Kg of N, respectively, compared to the non-irrigated.…”

“…Nitrogen fertilization has been a subsequent strategy to promote pasture intensification, with increasing linear responses in Tifton 85 (Quaresma et al, 2011;Gomes et al, 2015b;Taffarel et al, 2016;Sanches et al, 2017). Taffarel et al (2016) reported an increase of up to 13.8 kg day -1 of DM for each kg of applied N, in an experiment with nitrogen doses.…”

Effect of Irrigation Schemes on Forage Yield, Water Use Efficiency, and Nutrients in Artificial Grassland under Arid Conditions

“…Studies have shown that irrigated grasslands may have higher and more stable rates of yield [6][7][8]. However, achieving high output yields with less irrigation in an efficient and sustainable manner is one of the key challenges in artificial grasslands in arid areas.…”