Trigo de duplo propósito submetido ao pastejo de bovinos nos Campos Gerais do Paraná

Bartmeyer, Tarcísio Nicolau; Dittrich, João Ricardo; Silva, Hernani Alves da; Moraes, Aníbal de; Piazzetta, Ricardo Guimarães; Gazda, Tatiana Louise; Carvalho, Paulo César de Faccio

doi:10.1590/s0100-204x2011001000019

Cited by 19 publications

(15 citation statements)

References 5 publications

(5 reference statements)

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“…The effects of closing cut date (CCD) or grazing termination date on cool-season grasses and cereals to increase grain or seed production have been the subject of frequent studies (Holman et al, 2008;Bartmeyer et al, 2011;Baumhardt et al, 2011;Harrison et al, 2011). This practice has not been studied on 'Mombasa' grass or on the other M. maximus cultivars released in Brazil.…”

Section: Introductionmentioning

confidence: 99%

Seed production of 'Mombasa' grass subjected to different closing cut dates and nitrogen rates

Canto

Almeida

Costa

et al. 2016

Pesq. agropec. bras.

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-The objective of this work was to evaluate the effects of closing cut dates (CCD) and nitrogen (N) rates on the components of pure seed yield (PSY) and seed quality in 'Mombasa' grass (Megathyrsus maximus 'Mombaça'), besides determining the parameters of apparent N efficiency (ANE) and agronomic N efficiency (AgNE). The field experiments were carried out over two growing seasons, 2010/2011 and 2011/2012, in Umuarama, PR, Brazil. The folllowing treatments were evaluated: CCD on October 10, January 31, February 15, and March 1; and N doses at 0, 75, 150, and 225 kg ha -1 . Significant interactions between the CCD and N doses were observed for the panicle tiller number (PTN), pure seeds per panicle, PSY, ANE and AgNE. Values of ANE and AgNE were better for 150 kg N ha -1 . There were no effects of CCD and N doses on seed quality. PSY was closely correlated with PTN, pure seeds per panicle, and pure seed number.The CCD treatments of longer growth duration and higher N doses showed the higher PSY. Final CCD delaying until February and N availability reduced yield. Closing cut date and N fertilization affect pure seed yield and yield component responses of 'Mombasa' grass.Index terms: agronomic nitrogen efficiency, apparent nitrogen efficiency, seed quality, seed yield. de N. A DR e o N não tiveram efeitos sobre a qualidade das sementes. O RSP foi estreitamente correlacionado ao NPP, às sementes puras por panícula e ao número de sementes puras. As DRs com maiores durações de crescimento e doses de N tiveram maiores RSP. O atraso da DR final até fevereiro e a disponibilidade de N reduziram os rendimentos. A data de rebaixamento e a adubação com N afetam as respostas do rendimento de sementes puras e as componentes do rendimento do capim-mombaça. Produção de sementes de capim-mombaça submetido a diferentes datas de rebaixamento e doses de nitrogênioTermos para indexação: eficiência agronômica de nitrogênio, eficiência aparente de nitrogênio, qualidade de sementes, rendimento de sementes.

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Section: Introductionmentioning

confidence: 99%

Seed production of 'Mombasa' grass subjected to different closing cut dates and nitrogen rates

Canto

Almeida

Costa

et al. 2016

Pesq. agropec. bras.

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“…Scheffer-Basso et al (2001) concluded that grain yield may be increased by reduction in lodging. According to Bartmeyer et al (2011), defoliation can increase grain yield by reducing lodging, as long as grazing time and intensity are not severe. When lodging occurs in the grain-filling stage, it limits the translocation of photoassimilates in the plants to the grains.…”

Section: Resultsmentioning

confidence: 99%

Agronomic performance of wheat BRS Tarumã under different sowing densities, nitrogen fertilization and cutting managements

Zílio¹,

Campioni²,

Mantovani³

et al. 2018

Científica

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“…The treatments consisted of three winter cereal crops [IPR 126 oat (Avena sativa), BRS Tarumã wheat (Triticum sativum L.), and IPR 111 triticale (× Triticosecale Wittmack) on three A tracks (10 × 18 m), and the three B tracks (5 × 30 m) were the grazing treatments: without grazing (WG), one grazing event (1G), or two grazing events (2G). The plots were formed by the combination of the A and B tracks (5 × 10 m), and the dates of sowing, grazing, and harvest, as well as the height of the crops before and after grazing (AMBROSI et al, 2001;LOPES et al, 2009;BARTMEYER et al, 2011;SANTOS et al, 2013a) are described in Table 2. Figure 1.…”

Section: Methodsmentioning

confidence: 99%

“…For this reason, the number of cobs per area tends to be similar between treatments with or without grazing. However, cobs produced by these additional tillers are less-developed and smaller in size than the cobs produced by the main tillers; therefore, there is lower total grain productivity with grazing treatments (BARTMEYER et al, 2011), as seen in the treatments with two grazings (Table 5). …”

Section: Agronomic Characteristicsmentioning

confidence: 99%

“…It is also important that there is no excessive trampling so that the soil porosity is not compromised, as this consequently impairs water infiltration and soil aeration, which contribute to the development of the summer crops' deep roots. In addition, the end of the grazing period must be before the elongation of the internodes of the plants, and must be timed so that the residual height of the crops assures a minimum of 2 t ha -1 of haystack on the stubble (BARTMEYER et al, 2011;CRUZ et al, 2010;HASTENPFLUG et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Productivity and the presence of mycotoxins in oats, wheat, and triticale subjected to grazing

Taffarel

Oliveira

Piano

et al. 2017

SCA

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This study aimed to evaluate the effects of grazing on the agronomic characteristics, grain yield, and presence of the mycotoxins aflatoxins, fumonisins, and zearalenone in IPR 126 oat, BRS Tarumã wheat, and IPR 111 triticale. This study was performed from April 24, 2012 to November 11, 2013 at UNIOESTE's Experimental Farm in southern Brazil. The experimental design was a randomized block in a banded scheme, with four replications. The treatments in the A tracks were the three crops and the B tracks, the treatments: without grazing, one grazing event, or two grazing events. One grazing reduced the productivity of oat by 42.48% and triticale by 28.09% and increased wheat productivity by 24.89%. Two grazings reduced oat productivity by 54.14%, wheat by 40.96%, and triticale by 54.69%. Crops subjected to two grazings should be used for dry matter production for ground cover or partially used for silage when the plant is in the pasty or semi-hard grain stage, as grazing affects the agronomic characteristics and grain yield. The BRS Tarumã wheat, when used in crop-livestock integration systems, should be grazed only once due to increased productivity, while IPR 126 oat and IPR 111 triticale should not be grazed in crop-livestock integration systems for commercial production of grain. Oats from grazed plants should not be added to feeds of poultry in the early stage or pigs in the early and growth stages due to the higher levels of aflatoxins, fumonisins, and zearalenone. Grazing of winter crops increases the length of the crop cycle and grain formation will occur under climatic conditions favorable to the mycotoxins. Therefore, when grains are intended for human consumption, grazing is not recommended, as it increases the possibility of aflatoxins, fumonisins, and zearalenone at levels above the maximum tolerable levels permitted by law. These grains should be supplied to animals only after analysis of the mycotoxin levels present in the grains. ResumoObjetivou-se avaliar os efeitos dos pastejos nas características agronômicas, produtividade de grãos e presença das micotoxinas: aflatoxinas, fumonisinas e zearalenona em grãos de aveia IPR 126, trigo BRS Tarumã e triticale IPR 111. O trabalho foi desenvolvido no período de 24/04/2012 a 21/03/2014 (24º31'56,1''S; 54º01'10.3"O). O delineamento experimental foi em blocos ao acaso em esquema de faixas, com quatro repetições. Os tratamentos nas faixas A foram as três culturas e nas faixas B os manejo:sem pastejo, um pastejo e dois pastejos. O manejo com apenas um pastejo reduziu a produtividade de grãos da aveia em 42,48% e do triticale em 28,09% e aumentou a produtividade do trigo em 24,89%. O manejo com dois pastejos reduziu a produtividade da aveia em 54,14%, do trigo em 40,96% e do triticale em 54,69%. As culturas submetidas a dois pastejos devem ser diferidas para produção de matéria seca para cobertura do solo ou utilizar de forma parcial a planta no estágio de grãos pastosos ou semiduros para silagem, pois o pastejo prejudica as características agronômicas e...

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Trigo de duplo propósito submetido ao pastejo de bovinos nos Campos Gerais do Paraná

Cited by 19 publications

References 5 publications

Seed production of 'Mombasa' grass subjected to different closing cut dates and nitrogen rates

Seed production of 'Mombasa' grass subjected to different closing cut dates and nitrogen rates

Agronomic performance of wheat BRS Tarumã under different sowing densities, nitrogen fertilization and cutting managements

Productivity and the presence of mycotoxins in oats, wheat, and triticale subjected to grazing

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