Herbage accumulation, plant-part composition and nutritive value on grazed signal grass (Brachiaria decumbens) pastures in response to stubble height and rest period based on canopy light interception
Carlos G. S. Pedreira A D , Gustavo J. Braga B and Jorge N. Portela C
+ Author Affiliations
- Author Affiliations
A Dept. Zootecnia, ESALQ, Universidade de São Paulo, Piracicaba, SP 13418-900, Brazil.
B EMBRAPA Cerrados, BR 020, km 18, Planaltina, DF, 73310-970, Brazil.
C Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul, Av. Osvaldo Aranha 540, Bairro Juventude da Enologia, Bento Gonçalves, RS, 95700-206, Brazil.
D Corresponding author. Email: cgspedreira@usp.br
Crop and Pasture Science 68(1) 62-73 https://doi.org/10.1071/CP16333
Submitted: 9 September 2016 Accepted: 13 December 2016 Published: 9 January 2017
Abstract
Signal grass (Brachiaria decumbens cv. Basilisk, syn. Urochloa decumbens Stapf R.D. Webster) has been widely grown in the Brazilian tropics over the last 40 years, but management recommendations have been largely empirical and not based on canopy targets. This study was designed to characterise and explain the impact of canopy-based grazing strategies on herbage accumulation, plant-part composition, and nutritive value of signal grass. Treatments were factorial combinations of two stubble heights, 5 cm (SH5) and 10 cm (SH10), and two grazing frequencies, grazing initiated when 95% (LI95) and 100% (LI100) of incoming light was intercepted by the canopy. Rest periods were imposed during summer and autumn of both experimental years. Leaf blade accumulation was greater for LI100 than LI95 (9.5 v. 8.8 t/ha) associated with increased stem accumulation (4.6 v. 3.5 t/ha for LI100 v. LI95). The SH10 pastures produced more stem than SH5 pastures (4.4 v. 3.6 t/ha), with no difference in leaf blade accumulation. In general, SH10 pastures had more residual leaf blade mass post-graze, whereas SH5 pastures combined with higher grazing frequency (SH5-LI95) became more prostrate over time, increasing leaf blade proportion in post-graze forage. Over time, stubble height had more influence than grazing frequency on leaf blade proportion at pre-graze, and SH5 pastures had leafier canopies than SH10 pastures. Digestibility was less under LI100, especially when associated with SH5 stubble (SH5-LI100), regardless of season of the year. To provide optimal leaf blade yield and overall forage digestibility, particularly during warm, rainy seasons, defoliation of signal grass should include pre-graze height varying from 18 to 30 cm (95–100% of light interception) and mean stubble height close to 10 cm.
Additional keywords: leaf area index, canopy height, crude protein, digestibility, brachiariagrass.
References
Anjos AJ, Gomide CAM, Ribeiro KG, Madeiro AS, Morenz MJF, Paciullo DSC (2016) Forage mass and morphological composition of Marandu palisade grass pasture under rest periods. Ciência e Agrotecnologia 40, 76–86.Barbosa RA, Nascimento D, Euclides VPB, Da Silva SC, Zimmer AH, Torres RAA (2007) Capim-tanzânia submetido a combinações entre intensidade e frequência de pastejo. Pesquisa Agropecuária Brasileira 42, 329–340.
| Capim-tanzânia submetido a combinações entre intensidade e frequência de pastejo.Crossref | GoogleScholarGoogle Scholar |
Benvenutti MA, Gordon IJ, Poppi DP, Crowther R, Spinks W (2008) Foraging mechanics and their outcomes for cattle grazing reproductive tropical swards. Applied Animal Behaviour Science 113, 15–31.
| Foraging mechanics and their outcomes for cattle grazing reproductive tropical swards.Crossref | GoogleScholarGoogle Scholar |
Braga GJ, Pedreira CGS, Herling VR, Luz PHC, Lima CG (2006) Sward structure and herbage yield of rotationally stocked pastures of ‘Marandu’ palisadegrass (Brachiaria brizantha (A.Rich.) Stapf) as affected by herbage allowance. Scientia Agrícola 63, 121–129.
| Sward structure and herbage yield of rotationally stocked pastures of ‘Marandu’ palisadegrass (Brachiaria brizantha (A.Rich.) Stapf) as affected by herbage allowance.Crossref | GoogleScholarGoogle Scholar |
Braga GJ, Portela JN, Pedreira CGS, Leite VBO, Oliveira EA (2009) Herbage yield in Signalgrass pastures as affected by grazing management. South African Journal of Animal Science 39, 130–132.
Carnevalli RA, Da Silva SC, Bueno AAO, Uebele MC, Bueno FO, Silva GN, Moraes JP (2006) Herbage production and grazing losses in Panicum maximum cv. Mombaça under four grazing managements. Tropical Grasslands 40, 156–176.
Castillo E, Valles B, Jarillo J, Ocanã E (2009) Pasture height distribution of grazed tropical native grammas in Veracruz State, Mexico. Grassland Science 55, 140–148.
| Pasture height distribution of grazed tropical native grammas in Veracruz State, Mexico.Crossref | GoogleScholarGoogle Scholar |
Coêlho JJ, Dubeux JCB, Santos ERS, Leão Neto JMC, Cunha MV, Santos MVF, Mello ACL, Lira MA (2014) Canopy height and its relationship with leaf area index and light interception in tropical grasses. Tropical Grasslands – Forrajes Tropicales 2, 31–32.
| Canopy height and its relationship with leaf area index and light interception in tropical grasses.Crossref | GoogleScholarGoogle Scholar |
Da Silva SC, Pereira LET, Sbrissia AF, Hernandez-Garay A (2015) Carbon and nitrogen reserves in marandu palisade grass subjected to intensities of continuous stocking management. Journal of Agricultural Science 153, 1449–1463.
Difante GS, Nascimento D, Euclides VPB, Da Silva SC, Barbosa RA, Gonçalves WV (2009) Sward structure and nutritive value of Tanzania guineagrass subjected to rotational stocking managements. Revista Brasileira de Zootecnia 38, 9–19.
| Sward structure and nutritive value of Tanzania guineagrass subjected to rotational stocking managements.Crossref | GoogleScholarGoogle Scholar |
Donaghy DJ, Fulkerson WJ (1998) Priority for allocation of water-soluble carbohydrate reserves during regrowth of Lolium perenne. Grass and Forage Science 53, 211–218.
| Priority for allocation of water-soluble carbohydrate reserves during regrowth of Lolium perenne.Crossref | GoogleScholarGoogle Scholar |
Euclides VPB, Euclides Filho K, Costa FP, Figueiredo GR (2001) Desempenho de novilhos F1 Angus-Nelore em pastagens de Brachiaria decumbens submetidos a diferentes regimes alimentares. Revista Brasileira de Zootecnia 30, 470–481.
| Desempenho de novilhos F1 Angus-Nelore em pastagens de Brachiaria decumbens submetidos a diferentes regimes alimentares.Crossref | GoogleScholarGoogle Scholar |
Euclides VPB, Flores R, Medeiros RN, Oliveira MP (2007) Diferimento de pastos de braquiária cultivares Basilisk e Marandu, na região do Cerrado. Pesquisa Agropecuária Brasileira 42, 273–280.
Euclides VPB, Valle CB, Macedo MCM, Almeida RG, Montagner DB, Barbosa RA (2010) Brazilian scientific progress in pasture research during the first decade of XXI century. Revista Brasileira de Zootecnia 39, 151–168.
| Brazilian scientific progress in pasture research during the first decade of XXI century.Crossref | GoogleScholarGoogle Scholar |
Gibb MJ, Ridout MS (1986) The fitting of frequency distributions to height measurements on grazed swards. Grass and Forage Science 41, 247–249.
| The fitting of frequency distributions to height measurements on grazed swards.Crossref | GoogleScholarGoogle Scholar |
Hare MD, Tatsapong P, Phengphet S (2009) Herbage yield and quality of Brachiaria cultivars, Paspalum atratum and Panicum maximum in north-east Thailand. Tropical Grasslands 43, 65–72.
Holden LA (1999) Comparison of methods of in vitro dry matter digestibility for ten feeds. Journal of Dairy Science 82, 1791–1794.
| Comparison of methods of in vitro dry matter digestibility for ten feeds.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK1MXlsVykurk%3D&md5=e9b54e0ebf95b92f623ecd141166812eCAS |
King J, Sim EM, Barthran GT (1986) A comparison of spectral reflectance and sward surface height measurements to estimate herbage mass and leaf area index in continuously stocked ryegrass pastures. Grass and Forage Science 41, 251–258.
| A comparison of spectral reflectance and sward surface height measurements to estimate herbage mass and leaf area index in continuously stocked ryegrass pastures.Crossref | GoogleScholarGoogle Scholar |
Korte CJ, Watkin BR, Harris W (1982) Use of residual leaf area index and light interception as criteria for spring-grazing management of a ryegrass-dominant pasture. New Zealand Journal of Agricultural Research 25, 309–319.
| Use of residual leaf area index and light interception as criteria for spring-grazing management of a ryegrass-dominant pasture.Crossref | GoogleScholarGoogle Scholar |
Littell RC, Milliken GA, Stroup WW, Wolfinger RD, Schabenberger O (2006) ‘SAS for mixed models.’ 2nd edn (SAS Institute: Carey, NC)
Loch DS (1977) Brachiaria decumbens (Signal grass)—a review with particular reference to Australia. Tropical Grasslands 11, 141–156.
Nave RLG, Pedreira CGS, Lima CG (2009) Canonical correlations among chemical, physical, and morphological characteristics of Xaraes palisadegrass under rotational grazing. Scientia Agrícola 66, 270–275.
| Canonical correlations among chemical, physical, and morphological characteristics of Xaraes palisadegrass under rotational grazing.Crossref | GoogleScholarGoogle Scholar |
Ng TT (1972) Comparative responses of some tropical grasses to fertiliser nitrogen in Sarawak, E. Malaysia. Tropical Grasslands 6, 229–236.
Paciullo DS, Lopes FC, Malaquias Jr JD, Viana Fo A, Rodriguez NM, Morenz MJF, Aroeira LJM (2009) Características do pasto e desempenho de novilhas em sistema silvipastoril e pastagem de braquiária em monocultivo. Pesquisa Agropecuária Brasileira 44, 1528–1535.
| Características do pasto e desempenho de novilhas em sistema silvipastoril e pastagem de braquiária em monocultivo.Crossref | GoogleScholarGoogle Scholar |
Palhano AL, Carvalho PCF, Dittrich JR, Moraes A, Barreto MZ, Santos MCF (2005) Estrutura da pastagens e padrões de desfolhação em capim Mombaça em diferentes alturas do dossel forrageiro. Revista Brasileira de Zootecnia 34, 1860–1870.
| Estrutura da pastagens e padrões de desfolhação em capim Mombaça em diferentes alturas do dossel forrageiro.Crossref | GoogleScholarGoogle Scholar |
Pedreira BC, Pedreira CGS, Da Silva SC (2007) Estrutura do dossel e acúmulo de forragem de Brachiaria brizantha cultivar Xaraés em resposta a estratégias de pastejo. Pesquisa Agropecuária Brasileira 42, 281–287.
| Estrutura do dossel e acúmulo de forragem de Brachiaria brizantha cultivar Xaraés em resposta a estratégias de pastejo.Crossref | GoogleScholarGoogle Scholar |
Pedreira BC, Pedreira CGS, Da Silva SC (2009) Acúmulo de forragem durante a rebrotação do capim-xaraés submetido a três estratégias de desfolhação. Revista Brasileira de Zootecnia 38, 618–625.
| Acúmulo de forragem durante a rebrotação do capim-xaraés submetido a três estratégias de desfolhação.Crossref | GoogleScholarGoogle Scholar |
Peel MC, Finlayson BL, McMahon TA (2007) Updated world map of the Köppen–Geiger climate classification. Hydrology and Earth System Sciences 11, 1633–1644.
| Updated world map of the Köppen–Geiger climate classification.Crossref | GoogleScholarGoogle Scholar |
Pereira VV, Fonseca DM, Martuscello JA, Cecon PR, Santos MV, Braz TGS (2012) Biomass accumulation in mombasa guineagrass plants under different levels of nitrogen supply and plant densities. Revista Brasileira de Zootecnia 41, 1118–1126.
| Biomass accumulation in mombasa guineagrass plants under different levels of nitrogen supply and plant densities.Crossref | GoogleScholarGoogle Scholar |
Pizarro EA, Valle CB, Keler-Grein G, Schultze-Kraft R, Zimmer AH (1996) Regional experience with Brachiaria: Tropical America—savannas. In ‘Brachiaria: biology, agronomy, and improvement’. (Eds JW Miles, BL Maass, CB Valle) pp. 225–243. (CIAT: Cali, Colombia)
Portela JN, Pedreira CGS, Braga GJ (2011) Demografia e densidade de perfilhos de capim-braquiária sob pastejo em lotação intermitente. Pesquisa Agropecuária Brasileira 46, 315–322.
| Demografia e densidade de perfilhos de capim-braquiária sob pastejo em lotação intermitente.Crossref | GoogleScholarGoogle Scholar |
Rao IM, Kerridge PC, Macedo MCM (1996) Nutritional requirements of Brachiaria and adaptation to acid soils. In ‘Brachiaria: biology, agronomy, and improvement’. (Eds JW Miles, BL Maass, CB Valle) pp. 53–71. (CIAT: Cali, Colombia)
Rueda JA, Ortega-Jimenez E, Hernandez-Garay A, Enríquez-Quiroz J, Guerrero-Rodríguez JD, Quero-Carrillo AR (2016) Growth, yield, fiber content and lodging resistance in eight varieties of Cenchrus purpureus (Schumach.) Morrone intended as energy crop. Biomass and Bioenergy 88, 59–65.
| Growth, yield, fiber content and lodging resistance in eight varieties of Cenchrus purpureus (Schumach.) Morrone intended as energy crop.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC28XkvVyltr0%3D&md5=77827642b31f0d56d5a5a13bdd5c5fcbCAS |
Santos MER, Fonseca DM, Silva GP, Pimentel RM, Carvalho VV, Silva SP (2010) Estrutura do pasto de capim-braquiária com variação de alturas. Revista Brasileira de Zootecnia 39, 2125–2131.
| Estrutura do pasto de capim-braquiária com variação de alturas.Crossref | GoogleScholarGoogle Scholar |
Soil Survey Staff (1999) ‘Soil Taxonomy: A basic system of soil classification for making and interpreting soil surveys’. 2nd edn Agricultural Handbook 436. Natural Resources Conservation Service. pp. 869. (USDA: Washington, DC)
Stur WW, Hopkinson JM, Chen CP (1996) Regional experience with Brachiaria: Asia, the South Pacific, and Australia. In ‘Brachiaria: Biology, agronomy, and improvement’. (Eds JW Miles, BL Maass, CB Valle) pp. 258–271. (CIAT: Cali, Colombia)
Tuñon G, Kennedy E, Horan B, Hennessy D, Lopez-Villalobos N, Kemp P, Brennan A, O’Donovan M (2014) Effect of grazing severity on perennial ryegrass herbage production and sward structural characteristics throughout an entire grazing season. Grass and Forage Science 69, 104–118.
| Effect of grazing severity on perennial ryegrass herbage production and sward structural characteristics throughout an entire grazing season.Crossref | GoogleScholarGoogle Scholar |
Valle CB, Macedo MCM, Euclides VPB, Jank L, Resende RMS (2010) Gênero Brachiaria. In ‘Plantas forrageiras’. (Eds DM Fonseca, JA Martuscelo) pp. 30–77. (UFV: Viçosa, MG, Brazil)
Wallau MO, Sollenberger LE, Vendramini JMB, Gomide CAM, Mullenix MK, Quesenberry KH (2016) Performance of Limpograss breeding lines under various grazing management strategies. Crop Science 56, 3345–3353.
| Performance of Limpograss breeding lines under various grazing management strategies.Crossref | GoogleScholarGoogle Scholar |
Wiles PG, Gray IK, Kissling RC (1998) Routine analysis of protein by Kjeldahl and Dumas methods: review and interlaboratory study using dairy products. Journal of AOAC International 81, 620–632.
Winter WH (1976) Preliminary evaluation of twelve tropical grasses with legumes in Northern Cape York Peninsula. Tropical Grasslands 10, 15–20.
Wolfinger R, Oconnel M (1993) Generalized linear mixed models—a pseudo-likelihood approach. Journal of Statistical Computation and Simulation 48, 233–243.
| Generalized linear mixed models—a pseudo-likelihood approach.Crossref | GoogleScholarGoogle Scholar |
