Crescimento da parte aérea de cana crua e queimada

Alvarez, I. A.; Castro, Paulo Roberto de Camargo e

doi:10.1590/s0103-90161999000500008

Cited by 16 publications

(10 citation statements)

References 2 publications

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“…The 75% level of ETc had the fastest growth, growing 1.96 cm day -1 , and the 150% level had the slowest, with growth of only 1.81 cm day -1 . This same pattern was observed by Alvarez and Castro (1999) and INMAN-BAMBER et al (2002), who reported that culm elongation coincided with the period in which the LA was greatest.…”

Section: Resultssupporting

confidence: 85%

Growth and Productivity of Sugarcane Varieties Under Various Irrigation Levels

Costa

Saad

Júnior³

2016

Rev. Caatinga

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-This study evaluated the growth and agro-industrial productivity of sugarcane varieties subjected to different irrigation levels in the county of Penápolis -São Paulo, Brazil. The experimental design was a randomized block with a factorial arrangement of 2 × 7 (two cultivars of sugarcane: RB965902 and RB855453, at seven irrigation levels: L0 = 0%, L1 = 25%, L2 = 50%, L3 = 75%, L4 = 100%, L5 = 125%, and L6 = 150% of crop evapotranspiration -ETc) with four replicates. The irrigation system was a subsurface drip at a flow rate of 1.4 L h -1 . The variables evaluated were tillering, culm length, leaf area index (LAI), dry matter, and industrial productivity. The maximum number of plants per linear meter was 30 for variety RB965902 at 100% ETc, and 29 for variety RB855453 at 125% of ETc. Maximum tillering occurred at 120 and 150 days after planting (DAP) for RB965902 and RB855453, respectively. The maximum LAI of BR965902 was 9.57 at 210 DAP and 9.81 at 201 DAP for the RB855453 variety. CRESCIMENTO E PRODUTIVIDADE DE VERIEDADES DE CANA-DE-AÇÚCAR SOB DIFERENTES LÂMINAS DE IRRIGAÇÃORESUMO -O objetivo deste estudo foi avaliar o crescimento e a produtividade agroindustrial de variedades de cana-planta submetidas a lâminas de irrigação no município dePenápolis -SP. O delineamento experimental foi em blocos casualizados com arranjo fatorial de 2 x 7 (duas variedades de cana-de-açúcar: RB965902 e RB855453 e sete lâminas de irrigação: L 0 = 0%, L 1 = 25%, L 2 = 50%, L 3 = 75%, L 4 = 100, L 5 = 125% e L 6 = 150% da evapotranspiração da cultura -ETc) e quatro repetições. O sistema de irrigação foi gotejamento subsuperficial com emissores de 1,40 L h -1. As variáveis avaliadas foram: perfilhamento, altura de plantas, índice de área foliar (IAF) e produtividade agroindustrial. O número máximo de plantas por metro linear foi 30 para variedade RB965902 com 100% e 29 para a RB855453 com 125% da ETc. O perfilhamento máximo ocorreu aos 120 e 150 dias após o plantio (DAP) na RB965902 e RB855453, respectivamente. O IAF máximo da RB965902 foi 9,57 aos 210 DAP e 9,81 aos 240 DAP para a RB855453.

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Section: Resultssupporting

confidence: 85%

Growth and Productivity of Sugarcane Varieties Under Various Irrigation Levels

Costa

Saad

Júnior³

2016

Rev. Caatinga

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“…The number of stalks averaged 16 stalks per linear meter, with an average length of 1.57 m (Figures 7A and 7C) and an average diameter of 2.27 cm ( Figure 7E). Similar results for the number of stalks were found by Alvarez and Castro (1999), where the tillering was similar for the production systems, raw cane and burnt cane, in the first year of ratoon cane, with an average of 21 tillers per meter for raw cane and 20 for burnt cane.…”

Section: Resultssupporting

confidence: 82%

“…Stalk diameter over the course of plant development showed a reduction in relation to the start of development Alvarez and Castro (1999) at 60 DAP. also found a reduction in stalk diameter in cane harvested raw in the first and second years.…”

Section: Resultsmentioning

confidence: 98%

Agronomic performance of sugarcane cultivated under quantities of sugarcane straw on the soil surface

Oliveira

Zucareli

Neves

et al. 2016

SCA

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Mechanized harvesting has become increasingly common in the sugarcane production system. The sugarcane straw removed by mechanical harvesting could be converted into ethanol or be used to generate electricity by burning the material. At the same time, it is important to determine the amount of biomass that could be removed from the soil surface without damage to the cane crop. The agronomic performance of sugarcane was evaluated by growing the variety RB92579 under different amounts of sugarcane straw on the soil surface, in the first and second years of cane crop growth. An experimental randomized block in a split-plot design was used with four replications. In the first year the plots received five amounts of straw (0.0, 4.5, 9.0, 13.5, and 18 Mg ha -1 ), and six assessments (60, 120, 180, 240, 300, and 360 days after planting) were made in the subplots. In the second year, the plots received the same amount of straw and four assessments (60, 120, 240, and 540 days after the regrowth) in the subplots. Biometric indexes, components of production, and crop yield were evaluated. The data were submitted to variance analysis and polynomial regression (p < 0.05). Increasing amounts of sugarcane straw deposited on the soil surface reduced the number and diameter of stalks at the beginning of crop establishment and the number of leaves for the first year. The maximum productivity of stalks was achieved by maintaining on the soil surface 9.6 Mg ha -1 of straw in the first year and 4.7 Mg ha -1 of straw in the second year of cane crop production. Key words: Biomass. Green cane. Harvesting without burning. Saccharum spp. ResumoA colheita mecanizada está cada vez mais presente no sistema de produção de cana-de-açúcar. A palhada retirada durante a colheita pode ser convertida a etanol ou utilizada para geração de energia elétrica por meio da queima, sendo importante determinar a quantidade desta biomassa que pode ser removida, sem que haja prejuízos à cultura. Objetivou-se avaliar o desempenho agronômico da canade-açúcar, variedade RB92579, cultivada sob diferentes quantidades de palhada da cultura na superfície do solo, em cultivo de primeiro e segundo ciclo. Utilizou-se o delineamento experimental em blocos casualizados, com parcelas subdivididas no tempo, com quatro repetições. No primeiro ciclo as parcelas receberam cinco quantidades de palhada (0,0; 4,5; 9,0; 13,5 e 18 Mg ha -1 ) e seis épocas de avaliação (60, 120, 180, 240, 300, 360 dias após o plantio -DAP), dispostas nas subparcelas. No segundo ciclo,

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“…Para esse estudo, têm sido utilizados vários modelos lineares e não-lineares para descrever crescimento ao longo do tempo (ALVAREZ & CASTRO, 1999;URCHEI et al, 2000;HERNÁNDEZ et al, 2007 Ciência Rural, v.39, n.5, ago, 2009. em relação aos modelos lineares, os quais podem auxiliar o pesquisador no processo de tomada de decisão por apresentarem parâmetros com interpretação biológica. Dentre essas funções não-lineares, pode-se citar os modelos de: Brody ou Monomolecular (BRODY, 1945), Gompertz (WINSOR, 1932), Logístico (NELDER, 1961) e von Bertalanffy (von BERTALANFFY, 1957).…”

Section: Introductionunclassified