• Nenhum resultado encontrado

VII Encontro Científico de Produção Animal Sustentável 08 e 09 de novembro de 2017

N/A
N/A
Info
Descarregar agora
Protected

Academic year: 2021

Share "VII Encontro Científico de Produção Animal Sustentável 08 e 09 de novembro de 2017"

Copied!
1
0
0

Carregando.... (Ver texto completo agora)

Descarregar agora ( 1 páginas )

Texto

(1)

VII Encontro Científico de Produção Animal Sustentável 08 e 09 de novembro de 2017

Instituto de Zootecnia, Nova Odessa, SP

B. Indústr. Anim., Nova Odessa, v.74, suplemento, 2017

MINERAL CONCENTRATION OF THE STEMS OF SPONTANEOUS PLANTS, FORAGE LEGUME AND FORAGE GRASS

CONCENTRAÇÃO MINERAL DOS RAMOS/COLMOS DE PLANTAS ESPONTÂNEAS, LEGUMINOSA E GRAMÍNEA FORRAGEIRAS

A LBERTO N AGIB DE V ASCONCELLOS M IGUEL

1

*, F LAVIA M ARIA DE A NDRADE G IMENES

1

, T HIAGO H ERLING DA C RUZ M ADEIRA

1

, L INDA M ONICA P REMAZZI

1

, S ULEIZE R OCHA T ERRA

1

, ALESSANDRA APARECIDA

GIACOMINI

1

, S AMANTHA H ELEN P AULINO

1 1

Instituto de Zootecnia (IZ/APTA/SAA), Nova Odessa, SP, Brazil

*e-mail: albertomiguel@shaw.ca

Spontaneous plants are present in pastures and as such must be evaluated under the concepts of sustainability. The objective of this paper is to evaluate the mineral composition of the stems of forage and spontaneous plants of pastures grown in a greenhouse at the Instituto de Zootecnia in Nova Odessa, São Paulo, Brazil. Five plant species were evaluated: signalgrass (Urochloa decumbens cv. Basilisk), macrotiloma (Macrotyloma axillare NO 279) and three spontaneous plants: hairy beggarticks (Bidens pilosa), arrowleaf sida (Sida rhombifolia) and slender amaranth (Amaranthus viridis), in two cuttings (C1 and C2) at two different moments, in a randomized blocks design with four repetitions, totalling 40 experimental units (boxes filled with 35 kg of soil each). The concentrations of nitrogen (N), phosphorus (P), and potassium (K) in the stems were evaluated using PROC GLM SAS® and the Student test (P<0.05). The concentration of N varied with the species (P<0.0001) and was higher for slender amaranth, followed by hairy beggarticks, arrowleaf sida, macrotiloma and signalgrass, the last of which differed significantly from the others. There was a reduction in average N concentration (P<0.0001) from cutting 1 to cutting 2, from 28.89 to 15.24%. For P concentration, the highest values were for the spontaneous plants (average of 1.49 ± 0.133%) and lowest for macrotiloma and signalgrass (average of 1.60 ± 0.133%), and the P concentration (P<0.001) was higher for C1 (1.61 ± 0.084%) in relation to C2 (0.82 ± 0.084%). For K concentration, only slender amaranth (35.91 ± 3.057%) differed from the others (P<0.0001), with average of 10.33 ± 3.057%, and the K concentration fell from C1 (22.07 ± 1.933%) to C2 (8.82 ± 1.933%). Spontaneous plants presented higher concentration for the minerals evaluated in the stems compared to the grass and legume, which suggests that each plant has the potential to increase the mineral concentration in the soil differently, so those plants can collaborate for the sustainability of pasture systems, as their stems are trampled by cattle or their contents are recycled to the soil through dung and urine.

Keywords: forage, sustainability, weeds.

Acknowledgments:

To Fundação de Amparo a Pesquisa do Estado de São Paulo (FAPESP) for

project funding (Process 2016/22463-0) and to CNPq for the scholarship funding.

Referências

Descarregar agora ( PDF - 1 páginas - 42.62 KB )

Documentos relacionados

VII Encontro Científico de Produção Animal Sustentável 08 e 09 de novembro de 2017

Samples of six feedstuffs were evaluated, three grasses: Urochloa grass (Urochloa decumbens), Tobiatã grass (Megathyrsus maximus cv. Tobiata), and star grass

VII Encontro Científico de Produção Animal Sustentável 08 e 09 de novembro de 2017

From January to July 2016, at regular intervals of 21 days, ten harvests were performed, in which after measuring the canopy height, two forage samples (0.25 m 2 ) from

VII Encontro Científico de Produção Animal Sustentável 08 e 09 de novembro de 2017

This study aimed to evaluate the percentages of leaf, stem, dead material, height, leaf area index and light interception of palisade grass in four different types

VII Encontro Científico de Produção Animal Sustentável 08 e 09 de novembro de 2017

Then the plants were cut close to the soil and the leaves were separated into main branch (considered the central branch of each plant from which the other branches grow),

VII Encontro Científico de Produção Animal Sustentável 08 e 09 de novembro de 2017

The perennial soybean was superior in root production compared to the other species, indicating that its root system has greater capacity to compete with grasses

VII Encontro Científico de Produção Animal Sustentável 08 e 09 de novembro de 2017

The aim of this study was to evaluate the effect of parenteral administration of selenium and vitamin E on the somatic cell count in milk and blood and immunological

III Encontro Científico de Produção Animal Sustentável

However, intensification of aquaculture production systems expose fish to numerous stressors such as poor water quality, crowding, handling and transport which may negatively

  III Encontro Científico de Produção Animal Sustentável

Under the daily management of controlled feeding, it was expected a lower ED of the animals submitted to the T2 treatment, but it can conclude that the animals of CF and PF have