Effect of fertilization with fluid swine slurry on production and nutritive value of Tifton 85

Abstract

-The objective of this study was to evaluate the effect of different doses of liquid swine slurry on dry matter accumulation rate and nutritive values (crude proten and neutral detergent fiber) of Tifton 85 grass pasture cultivated in southwestern Paraná from October 2005 to March 2006. It was used a complete random experimental design in a 4 × 4 factorial scheme composed of four doses of swine slurry in the plots (0, 80, 160 and 320 m 3 /ha) and four consecutive cuts in the subplots of the pasture. It was carried out two applications, one in the beginning of the experiment and other after 80 days. Cuts were performed every time pasture height was 40 cm. There was a dose versus cut interaction for all variables. Swine slurry promoted increase on dry matter accumulation rate only on the first cut after its application (cuts 1 and 3). Dry matter maximal yield (24.2 t/ha) was obtained at 249 m 3 /ha of swine slurry manure (143 and 106 m 3 /ha, respectively for applications 1 and 2), corresponding to 450 kg of N/ha. Percentage of crude protein increases and neutral detergent fiber of Tifton 85 grass decreases as dose of swine slurry increases, improving forage nutritive value. Use efficiency and nitrogen recovery rate decrease with addition of swine slurry doses.

Pig slurry in carpet grass pasture: Yield and plant-available nitrogen

“…Then, it is no more related with the crop production per kg of N applied. The NAE obtained in this study was in the range reported by Vielmo et al (2011) for Tifton 85 (24 to 9 kg DM kg -1 N after fertilization with 144 and 576 kg N ha -1 year -1 , applied with 80 and 320 m 3 of pig slurry, respectively). Similar results were reported by Durigon et al (2002), of 6.6 (autumn) and 20.8 kg DM kg -1 N (spring) for a natural pasture, as well as to those reported by Miranda et al (2012) for giant missionary grass (19.0 kg DM kg -1 N from pig slurry; 30.3 kg DM kg -1 N from ammonium nitrate).…”

“…The PS doses were different between the years as a consequence of the N content in the manure, which changed in each period of application (Table 1). Positive and linear response to PS has been reported for natural pastures (Scheffer-Basso et al, 2008), Tifton 85 (Vielmo et al, 2011) and giant missionary grass (A. jesuiticus x A. scoparius) (Miranda et al, 2012). These reports and our results indicate 150 m 3 PS ha -1 (499 kg N ha -1 ) did not differ from the DMY obtained with ammonium sulfate (60 kg N ha -1 ).…”

Leaf tissues proportion and chemical composition of Axonopus jesuiticus x A. scoparius as a function of pig slurry application

“…The same trend was reported for Cynodon spp. fertilized with pig slurry (SCHEFFER-BASSO et al, 2008;VIELMO et al, 2011). The effects found in this study are the same found with mineral N fertilization on grasses, which increases the water concentration, and at higher rates results in progressively greater concentrations of N in the plant tissue (BUXTON & FALES, 1994).…”

“…Este trabalho teve como objetivo avaliar os atributos anatômicos e químicos da grama-missioneira-gigante à aplicação de 0, 62, 124, 186, 248 production and nutritive value of forage grasses (ADELI et al, 2005;SCHEFFER-BASSO et al, 2008;VIELMO et al, 2011). Besides of recognized effect of PS on increasing of forage production, the effects of this N source on anatomical feature are unknown, especially in native forage plants.…”

Residual effect of pig slurry on common carpet grass pasture

“…Many studies have found an increase in dry matter yield (DMY) of pastures in response to PS fertilization (Vielmo et al, 2011;Miranda et al, 2012;Zanine & Ferreira, 2015). A significant part of the organic N retained in the soil after PS application is derived from immobilized ammonium-N, which is slowly released over many years (Sorensen & Amato, 2002).…”