Dynamic and nutritive value of forage systems submitted to the conventional and organic production

DE BEM, Cláudia Marques; OLIVO, Clair Jorge; AGNOLIN, Carlos Alberto; AGUIRRE, Priscila Flôres; BRATZ, Vinicius Felipe; QUATRIN, Maurício Pase; SILVA, Aline Rodrigues; SIMONETTI, Gabriela Descovi; SANTOS, Fabiene Tomazetti dos; ALESSIO, Vinicius

doi:10.1590/S1519-99402015000300004

home Sumário navigate_before Anterior Atual Seguinte navigate_next

home Sumário

Forragicultura e pastagens • Rev. bras. saúde prod. anim. 16 (3) • Sept 2015 • https://doi.org/10.1590/S1519-99402015000300004 linkcopy

Dynamic and nutritive value of forage systems submitted to the conventional and organic production

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

The objective of this research was to evaluate the nutritive value on elephant grass pastures in two production systems. In the conventional system elephant grass was planted in rows 1.2 m apart from each other. In the organic system elephant grass was planted in rows 3 m apart from each other. In the space between alleys, in cool season, annual ryegrass was seeding; allowing the development of spontaneous growing species in the warm season. It was applied 100kg of N/ha with chemical and organic fertilizers (manure of cattle and pig slurry) in the respective pastures. Holstein cows receiving 0.9% of body weight complementary concentrate feed were used. Hand-plucked samples were collected to analyze chemical composition (mineral matter, organic matter, crude protein and neutral detergent fiber) and digestibility. The experimental design was completely randomized, with two treatments (systems) three replications (paddocks) with repeated measures (seasons). Eight and seven grazing cycles were performed during the experimental period for respective systems. Similar value was found in the chemical composition and digestibility of elephant grass in both pasture systems. The organic as much as conventional pasture systems showed high nutritive value considering the fertilization, management and utilization time.

crude protein; dry matter in situ digestibility; neutral detergent fiber; organic matter in situ digestibility; Pennisetum purpureum Schum

SF	Estações				Média	CV (%)
SF	Inverno	Primavera	Verão	Outono	Média	CV (%)
Massa de forragem de pré-pastejo (kg de MS/ha)
Org	1333^C	2052^Ba	2599^Ab	2644^Ab	2157	7,7
Conv	-	1220^Cb	5807^Aa	3735^Ba	3587	9,2

CV (%)	-	3,5	5,0	4,0
Massa de forragem de pós-pastejo (kg de MS/ha)
Org	618^C	867^Ba	900^Aa	898^Ba	821	7,3
Conv	-	446^Ab	251^Bb	291^Bb	329	8,0

CV (%)	-	7,5	7,0	8,1
Taxa de lotação (UA/ha)
Org	1,1^C	1,3^Bb	2,7^Ab	1,7^Bb	1,7	3,0
Conv	-	1,7^Ca	7,6^Aa	3,5^Ba	4,3	2,5

CV (%)	-	3,1	3,5	2,0

Parâmetros		SF	Estações				Média	CV (%)
Parâmetros		SF	Inverno	Primavera	Verão	Outono	Média	CV (%)
Pré-pastejo
Composição botânica – Orgânico (%)
CE	Org		-	29,2^B	59,6^A	56,0^A	48,3	5,5
AZ	Org		69,7^A	44,0^B	-	-	56,8	3,0
Outras	Org		10,1^C	18,3^B	33,7^A	37,2^A	24,8	8,0
MM EL	Org		20,7^A	8,6^B	6,7^BC	6,8^BC	10,7	10,0
Composição estrutural do capim elefante (%)
LF	Org		-	78,6^Ba	89,6^Aa	74,5^Ba	80,9	8,5
LF	Conv		-	71,6^Bb	90,5^Aa	71,8^Bb	78,0	9,0

CV (%)			-	7,0	8,4	8,1

CO+BA	Org		-	12,7^Bb	10,4^Ca	22,1^Aa	15,1	9,5
CO+BA	Conv		-	24,6^Aa	9,5^Ba	23,7^Aa	19,3	10,0

CV (%)			-	10,5	8,5	7,3

MS	Org		-	8,7^Aa	-	3,4^Bb	6,1	11,0
MS	Conv		-	3,8^Ab	-	4,5^Aa	4,2	11,5

CV (%)			-	9,0	-	9,5
Pós-pastejo
Composição botânica – Orgânico (%)
CE	Org		-	6,1^C	15,8^B	21,3^A	14,4	7,0
AZ	Org		55,5^A	36,0^B	-	-	45,7	10,1
Outras	Org		17,8^C	41,2^B	68,9^A	69,3^A	49,3	16,0
MM EL	Org		26,7^A	16,7^B	15,3^B	9,5^C	17,1	16,0
Composição estrutural do capim elefante (%)
LF	Org		-	37,4^Aa	39,4^Aa	29,6^Ba	35,5	8,5
LF	Conv		-	34,6^Ab	29,6^Bb	25,2^Bb	29,8	8,2

CV (%)			-	8,3	9,0	8,5

CO+BA	Org		-	52,2^Bb	58,6^Aa	62,4^Ab	57,7	18,3
CO+BA	Conv		-	54,6^Ba	58,2^Ba	66,3^Aa	59,7	16,2

CV (%)			-	17,5	16,1	18,0

MS	Org		-	10,4^Aa	2,0^Cb	8,0^Ba	10,2	14,0
MS	Conv		-	10,8^Aa	12,2^Aa	8,5^Ba	10,5	14,3

CV (%)			-	13,2	14,1	14,5

Variável	SF	Estações				Média	CV (%)
Variável	SF	Inverno	Primavera	Verão	Outono	Média	CV (%)
Matéria mineral (%)
EL	Org	12,9^B	14,4^A	8,6^BC	8,3^C	9,8	15,0
CE	Org	-	12,8^Aa	11,6^Aa	13,0^Aa	12,5	4,5
	Conv	-	12,0^Aa	10,0^Ba	13,4^Aa	11,8	5,1

CV (%)		-	2,5	3,0	2,0
Matéria orgânica (%)
EL	Org	87,1^A	85,6^AB	84,3^B	91,7^A	87,2	16,3
CE	Org	-	87,2^Aa	88,4^Aa	87,0^Aa	87,5	0,64
	Conv	-	88,0^Aa	90,0^Aa	86,6^Aa	88,2	0,68

CV (%)		-	1,0	1,3	0,9
Digestibilidade in situ da matéria seca (%)
EL	Org	88,2^A	69,4^B	57,9^BC	50,5^C	66,5	11,0
CE	Org	-	71,1^Aa	75,6^Aa	79,4^Aa	75,4	4,3
	Conv	-	70,4^Aa	74,4^Aa	68,6^Ab	71,2	11,1

CV (%)		-	3,5	4,7	5,7
Digestibilidade in situ da matéria orgânica (%)
EL	Org	87,5^A	69,5^B	66,2^C	50,6^C	68,5	5,9
CE	Org	-	70,1^Aa	75,2^Aa	78,1^Aa	74,5	4,9
	Conv	-	70,2^Aa	73,8^Ab	68,1^Ab	70,7	11,5

CV (%)		-	2,0	3,4	4,7
Nutrientes digestíveis totais (%)
EL	Org	76,7^A	63,0^B	43,5^C	45,6^C	57,2	15,4
CE	Org	-	61,9^Aa	67,0^Aa	69,1^Aa	66,0	4,9
	Conv	-	62,0^Aa	66,9^Aa	59,4^Ab	62,7	11,5

CV (%)		-	2,0	3,2	4,8
Fibra em detergente neutro (%)
EL	Org	51,5^C	69,5^AB	58,5^B	75,7^A	63,8	18,3
CE	Org	-	62,8^Aa	64,8^Ab	63,0^Aa	63,5	4,6
	Conv	-	62,2^Aa	73,2^Aa	63,8^Aa	66,4	12,8

CV (%		-	3,3	5,0	3,6
Proteína bruta (%)
EL	Org	24,1^A	11,7^C	12,3^C	15,9^B	16,0	13,6
CE	Org	-	15,2^Bb	17,2^Aa	17,4^Ab	16,6	15,0
	Conv	-	19,1^Aa	15,6^Bb	18,1^Aa	17,6	11,2

CV (%)		-	4,0	5,2	3,5

vertical_align_top file_download show_chart

more_horizclose
- image
- translate
- link
- article
- vertical_align_top
- file_download
- show_chart
- image
- translate
- link
- article

location_on

UFBA - Universidade Federal da Bahia Avenida Milton Santos, 500 - Ondina , CEP 40170-110 Salvador-BA Brasil, Tel. 55 71 32836725, Fax. 55 71 32836718 - Salvador - BA - Brazil
E-mail: rbspa@ufba.br

rss_feed Acompanhe os números deste periódico no seu leitor de RSS

Acessibilidade / Reportar erro

[TFN1] Org= capim elefante (CE) + azevém (AZ) + espécies de crescimento espontâneo (ECE); Conv= CE em cultivo singular. Médias seguidas por letras distintas, minúsculas na coluna e maiúsculas na linha, diferem entre si pelo teste de Tukey (P≤0,05).

[TFN2] UA=unidade animal, 450 kg de peso corporal. CV= coeficiente de variação.