Recovery of degraded “Brachiaria decumbens” pasture with the introduction of Stylosanthes and phosphorus fertilization

FABRICE, Carlos Eduardo Santos; SOARES FILHO, Cecílio Viega; PINTO, Marcos Franke; PERRI, Sílvia Helena Venturoli; CECATO, Ulysses; MATEUS, Gustavo Pavan

doi:10.1590/S1519-99402015000400001

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Revista Brasileira de Saúde e Produção Animal

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Forragicultura e Pastagens • Rev. bras. saúde prod. anim. 16 (4) • Dec 2015 • https://doi.org/10.1590/S1519-99402015000400001 copy

Recovery of degraded “Brachiaria decumbens” pasture with the introduction of Stylosanthes and phosphorus fertilization

Authorship SCIMAGO INSTITUTIONS RANKINGS

SUMMARY

This work aimed at evaluating the possibility of recovery of a degradedBrachiaria decumbens pasture with the introduction ofStylosanthes legumes and phosphorus fertilization. The experiment consisted of different input methods in a randomized complete block design with split plots (fertilized with and without phosphorus), with four repetitions and composed by the following treatments: control Brachiaria decumbens; partial drying with 1.5L ha^-1 glyphosate; total drying with 3.0L ha^-1 glyphosate; tillage; scarifying the soil; rome harrowing and plowing more harrowing. In the rome harrowing and plowing more harrowing treatments , the legume sowing was made by throwing, and the others by direct seeding. Six cuts were made to separate the morphological components of fodder and botanical composition. The highest total dry mass accumulation was found for partial drying with 1.5 L ha^-1 glyphosate, rome harrowing, plowing more harrowing and total drying with 3.0 L ha^-1 glyphosate in relation to tillage and control groups. The chemical composition was better in the springtime, CP and ADF showed significant differences between all treatments (P<0.05). The phosphate fertilizer took effect to ADF in the spring and fall seasons. The introduction of legumes through harrowing and plowing more harrowing, promoted the highest productivity in the total biomass and the partial and total drying increased the legume participation. The phosphorus fertilization only showed positive results in productivity and legume participation during the summer season.

cultivation; degradation; fertilizer; pasture; tillage

Produção de massa seca (t ha^-1)

Tratamentos	Total	LF	C+B	Estilosantes	Invasoras	Razão LF / C+ B
TB	2,36^b	0,85^a	0,79^a	0,00^c	0,66	1,07^ab
DT	3,29^ab	0,03^b	0,03^b	2,67^a	0,59	1,25^a
DP	2,74^ab	0,00^b	0,00^b	2,55^a	0,19	1,12^ab
PD	2,28^b	0,75^a	0,61^a	0,32^c	0,60	1,25^a
E	2,95^ab	0,77^a	0,74^a	0,97^bc	0,47	1,12^ab
G	3,48 ^a	0,74^a	0,63^a	1,70^ab	0,41	0,91^b
AG	3,55^a	0,57^ab	0,55^ab	1,78ab	0,65	1,06^ab

Sem adubo	2,81	0,43	0,42	1,24	0,20	1,08
Com adubo	3,09	0,54	0,49	1,30	0,32	1,10

CV (%)	18,90	8,37	9,05	10,23	11,92	14,75

Produção de massa seca (t ha^-1)

Tratamentos	Total	LF	C+B	Estilosantes	MM	Invasoras	Razão LF/C+B
TB	7,02^b	2,80^a	2,60^a	0,15^c	1,34^a	0,11^c	1,08
DT	10,73^a	0,26^c	0,27^c	8,51^a	0,25^b	1,42a^bc	1,16
DP	10,90^a	0,70^c	0,70^c	8,12^a	0,63^ab	0,73^abc	1,00
PD	6,46^b	2,26^ab	2,18^ab	0,44^c	1,25^a	0,33^cb	1,03
E	8,64^ab	2,08^ab	1,99^ab	2,57^bc	1,07^a	0,93^abc	1,04
G	11,16^a	2,13^ab	2,11^ab	4,08^b	1,14^a	1,70^a	1,01
AG	10,79^a	1,70^b	1,66^b	4,72^b	0,95^ab	1,60^a	1,05

Sem adubo	8,57^b	1,66	1,58	2,64^b	0,97	0,66^b	1,08
Com adubo	10,20^a	1,75	1,71	4,57^a	1,29	0,38^a	1,10

CV (%)	18,87	31,29	30,29	34,99	38,44	18,78	9,15

Produção de massa seca (t ha^-1)

Tratamentos	Total	LF	C+B	Estilosantes	MM	Invasoras	Razão LF/C+B
TB	2,05	0,54^a	0,59^a	0,11^c	0,69	0,12	0,92
DT	2,27	0,07^b	0,07^b	1,30^a	0,74	0,09	0,96
DP	2,28	0,30^ab	0,31^ab	1,00^ab	0,57	0,10	0,99
PD	1,97	0,48^a	0,54^a	0,19^c	0,60	0,16	0,89
E	2,09	0,43^a	0,44^a	0,57^bc	0,51	0,14	0,97
G	2,44	0,44^a	0,50^a	0,71^abc	0,61	0,18	0,87
AG	2,33	0,46^a	0,48^a	0,71^abc	0,17	0,13	0,94

Sem adubo	2,15	0,38	0,42	0,63	0,60	0,13	0,94
Com adubo	2,25	0,39	0,43	0,69	0,62	0,13	0,92

CV (%)	20,95	36,07	32,83	30,26	28,44	8,01	8,25

Tratamentos	Primavera			Verão			Outono

	PB	FDN	FDA	PB	FDN	FDA	PB	FDN	FDA
TB	6,97c	69,41	34,29^b	6,35^d	74,55^a	39,70^c	3,74^e	77,27	43,19^d
DT	8,98^b	65,58	39,56^a	8,60^b	73,05^ab	50,75^a	6,86^ab	76,55	55,69^a
DP	10,81^a	66,39	37,49^ab	9,41^a	71,44^b	50,08 ^a	7,26^a	75,24	55,12^a
PD	6,91^c	66,52	34,13^b	6,42^d	73,98^a	39,95^c	4,15^de	77,86	42,46^d
E	8,26^b	68,42	36,36^ab	7,02^d	72,64^ab	43,59 ^bc	5,83^bc	75,82	45,50^cd
G	8,78^b	68,27	39,11^a	7,86^c	73,36^ab	47,73^a	5,25^cd	75,69	48,38^bc
AG	8,51^b	69,80	38,76 ^a	8,04^bc	73,22^ab	45,57 ^ab	6,26^abc	75,58	50,35^b

Sem adubo	8,44	67,43	37,74^b	7,82	72,76	45,73	5,59	76,44	49,43^b
Com adubo	8,48	68,52	36,42^a	7,52	73,60	45,51	5,54	76,13	48,18^a

CV (%)	5,88	3,36	3,92	9,84	2,84	3,48	10,95	3,18	4,01

UFBA - Universidade Federal da Bahia Avenida Adhemar de Barros nº 500 - Ondina , CEP 41170-110 Salvador-BA Brasil, Tel. 55 71 32836725, Fax. 55 71 32836718 - Salvador - BA - Brazil
E-mail: rbspa@ufba.br

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