Components of herbage accumulation in elephant grass cvar Napier subjected to strategies of intermittent stocking management

被引:24
|
作者
Pereira, L. E. T. [1 ]
Paiva, A. J. [1 ]
Geremia, E. V. [1 ]
Da Silva, S. C. [1 ]
机构
[1] ESALQ USP, BR-13418900 Piracicaba, SP, Brazil
来源
JOURNAL OF AGRICULTURAL SCIENCE | 2014年 / 152卷 / 06期
基金
巴西圣保罗研究基金会;
关键词
BUNCHGRASS ERAGROSTIS-CURVULA; PERENNIAL GRASSES; TUSSOCK GRASS; DEFOLIATION; SWARDS; SECTORIALITY; ORGANIZATION; INTEGRATION; COMPETITION; SENESCENCE;
D O I
10.1017/S0021859613000695
中图分类号
S [农业科学];
学科分类号
09 ;
摘要
Herbage accumulation is determined by the tissue turnover of individual plants and by the regulation patterns of the number of individuals in a plant population, which function in conjunction to enable swards to adapt to variations in growth and management conditions. Based on the hypothesis that intermittent grazing strategies change the proportion of basal and aerial tillers and, consequently, sward herbage accumulation, the objective of the current experiment was to evaluate the components of herbage accumulation in elephant grass cvar Napier (Pennisetum purpureum Schum. cvar Napier) from January 2011 to April 2012. The treatments corresponded to combinations of two post-grazing (post-grazing heights of 35 and 45 cm) and two pre-grazing conditions (0.95 and maximum canopy light interception during regrowth - LI0.95 and LIMax) and were allocated to experimental units (850m(2) paddocks) according to a 2x2 factorial arrangement in a complete randomized block design with four replications. The following response variables were evaluated: the population density of basal tillers (TPDb) and the population density of aerial tillers (TPDa), the number of aerial tillers per supporting unit (A/B + VC), growth rates of the leaf (LGR) and stem (SGR), leaf senescence rate, net leaf accumulation rate (LAR), and the contributions of basal and aerial tillers to sward growth and senescence. The swards managed with the LI0.95 target had greater TPDb than those managed with the LIMax target, but no difference was recorded between the LI pre-grazing targets for TPDa. The larger A/B + VC ratio recorded for the swards managed with the LIMax target resulted in a higher contribution of aerial tillers to the growth and senescence of swards. This growth strategy resulted in a higher SGR and lower LGR and LAR for the swards managed with the LIMax target relative to those managed with the LI0.95 target. The post-grazing height targets affected only LGR during winter and the second summer and SGR on average for the experiment, with higher values recorded for the swards managed at 35 cm. The LI pre-grazing targets played a central role in defining the compensatory mechanisms responsible for the competitive ability of the plants, which were primarily expressed in the variation of the proportion of basal and aerial tillers in the tiller population and interfered with the components of herbage accumulation and total herbage yield of the swards.
引用
收藏
页码:954 / 966
页数:13
相关论文
共 39 条
  • [31] STRATEGIES OF ROTATIONAL STOCKING MANAGEMENT ON WEIGHT GAIN AND PRODUCTIVITY OF HEIFERS GRAZING ON MARANDU PALISADE GRASS
    Lima, M. L. P.
    Simili, F. F.
    Vercesi Filho, A. E.
    Ribeiro, E. G.
    Giacomini, A.
    Paz, C. C. P.
    Silveira, J. M. C.
    Roma Junior, L. C.
    BOLETIM DE INDUSTRIA ANIMAL, 2016, 73 (03): : 220 - 227
  • [32] Pre- and post-grazing biomass components of tanzania grass under intermittent stocking with four concentrate supplementation levels
    Fernandes Franco Pompeu, Roberto Claudio
    Duarte Candido, Magno Jose
    Miranda Neiva, Jose Neuman
    Pinheiro Rogerio, Marcos Claudio
    Faco, Olivardo
    REVISTA BRASILEIRA DE ZOOTECNIA-BRAZILIAN JOURNAL OF ANIMAL SCIENCE, 2008, 37 (03): : 383 - 393
  • [33] Leaf area index, light extinction coefficient and herbage accumulation in Cynodon spp. swards under continuous stocking management
    Fagundes, JL
    da Silva, SC
    Pedreira, CGS
    Carnevalli, RA
    de Carvalho, CAB
    Sbrissia, AF
    Pinto, LFD
    PESQUISA AGROPECUARIA BRASILEIRA, 2001, 36 (01) : 187 - 195
  • [34] Tillering dynamics in Guinea grass pastures subjected to management strategies under rotational grazing
    Zanine, Anderson de Moura
    do Nascimento Junior, Domicio
    de Lana Sousa, Braulio Maia
    Teixeira da Silveira, Marcia Cristina
    da Silva, Wilton Ladeira
    Rozalino Santos, Manoel Eduardo
    REVISTA BRASILEIRA DE ZOOTECNIA-BRAZILIAN JOURNAL OF ANIMAL SCIENCE, 2013, 42 (03): : 155 - 161
  • [35] EFFECTS OF A NAPIER ELEPHANT GRASS (PENNISETUM-PURPUREUM) SILAGE BASED DIET ON SOME BLOOD COMPONENTS OF F1 (HOLSTEIN X ZEBU) CALVES
    AGUILERA, GR
    ROSARIO, E
    GUTIERREZ, A
    CUBAN JOURNAL OF AGRICULTURAL SCIENCE, 1976, 10 (01): : 81 - 90
  • [36] Napier grass (Pennisetum purpureum Schum) management strategies for dairy and meat production in the tropics and subtropics: yield and nutritive value
    Islam, M. Rafiq
    Garcia, Sergio C.
    Sarker, Nathu R.
    Islam, Md. Ashraful
    Clark, Cameron E. F.
    FRONTIERS IN PLANT SCIENCE, 2023, 14
  • [37] Defoliation Strategies in Pastures Submitted to Intermittent Stocking Method: Underlying Mechanisms Buffering Forage Accumulation over a Range of Grazing Heights
    Sbrissia, A. F.
    Duchini, P. G.
    Zanini, G. D.
    Santos, G. T.
    Padilha, D. A.
    Schmitt, D.
    CROP SCIENCE, 2018, 58 (02) : 945 - 954
  • [38] EVALUATION OF THE AVAILABILITY OF MASS OF FORAGE: MORPHOLOGICAL RESPONSES AND CHEMICAL COMPOSITION OF TANZANIA GRASS SUBJECTED TO TWO PASTURE-MANAGEMENT STRATEGIES
    Camilo, Michele Gabriel
    Fernandes, Alberto Magno
    De Oliveira, Tadeu Silva
    Baffa, Danielle Ferreira
    Eduardo Bernardo, Sarah Ellen
    Cordeiro, Camila Da Conceicao
    BIOSCIENCE JOURNAL, 2020, 36 (06): : 2142 - 2152
  • [39] Comparison of haymaking strategies for cow-calf systems in the Salado Region of Argentina using a simulation model. 1. Effect of herbage mass at cutting and cow stocking rate under a rigid system of management
    Romera, AJ
    Morris, ST
    Hodgson, J
    Stirling, WD
    Woodward, SJR
    GRASS AND FORAGE SCIENCE, 2005, 60 (04) : 399 - 408