A new technique for determining the thermal parameters of phenological development in sugarcane, including suboptimum and supra-optimum temperature regimes

Liu, De Li; Kingston, G.; Bull, T. A.

doi:10.1016/s0168-1923(97)00087-7

Cited by 47 publications

(35 citation statements)

References 24 publications

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“…Neste ciclo o clima favoreceu o processo de maturação possibilitando déficit hídrico e com temperatura média do ar de aproximadamente 21 °C três meses antes da colheita que, de acordo com Liu et al (1998) favorece o processo de maturação da cultura.…”

Section: Methodsunclassified

“…Valores médios do número de perfilhos aos 305 dias após a colheita (DAC), da produção de colmos e dos parâmetros tecnológicos obtidos no ciclo da terceira cana-soca * Significativo a 0,05 de probabilidade; ns -Não significativo. Médias seguidas da mesma letra não diferem entre si pelo teste de Duncan; TSS -Teor de sólidos solúveis; Pol -Teor de sacarose; AR -Açúcares redutores; ATR -Açúcar total recuperável; RTR -Rendimento teórico de açúcar recuperável maio a julho de 2009 (Figura 1) foram adequadas para o processo de maturação da cana-de-açúcar conforme citado por Liu et al (1998). A temperatura média do ar no período de maio a julho de 2009 foi de 20,3 ºC; já a diferença entre a precipitação e a ETc foi negativa, com valor para este período específico de -108,7 mm (Figura 1), indicando baixo aporte hídrico para a cultura.…”

Section: Methodsunclassified

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Cana-de-açúcar fertirrigada com vinhaça via irrigação por gotejamento subsuperficial em três ciclos de cana-soca

Barbosa

Arruda²,

Pires³

et al. 2013

Rev. bras. eng. agríc. ambient.

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RESUMOObjetivou-se, com esta pesquisa, avaliar o efeito da irrigação, da fertigação mineral e da vinhaça, aplicadas via irrigação por gotejamento subsuperficial, no número de perfilhos, produção de colmos, qualidade tecnológica e rendimento de açúcar recuperável, nos três primeiros ciclos de cana-soca. Os tratamentos foram: T1NI -Cultivo não irrigado com adubação mineral; T2I -Cultivo irrigado e fertirrigado com fertilizantes minerais; T3Iv -Cultivo irrigado e fertirrigado com a vinhaça suprindo o K e complementação do NP via fertilizantes minerais e T4IV -Cultivo irrigado e fertirrigado, com a vinhaça suprindo o NPK. No ciclo da primeira canasoca não houve efeito dos tratamentos sobre as variáveis; já nos ciclos subsequentes o T2I e o T3Iv exibiram maiores números de perfilhos, 17,4 e 17,2 perfilhos m -1 na segunda cana-soca e 16,6 e 16,0 perfilhos m Sugarcane fertigated with vinasse under subsurface drip irrigation in three cycles of cane-ratoon ABSTRACT The objective of this study was evaluate the effect of irrigation and fertigation with mineral fertilizer and vinasse applied by subsurface drip irrigation, in the number of tiller, stem yield, technological quality of sugarcane and yield of recoverable sugar in first three cycles of ratoon cane. The treatments were: T1NI -cultivation without irrigation with mineral fertilization; T2I -cultivation fertigated with mineral fertilizers; T3Iv -cultivation fertigated with the vinasse supplying K and complementation of NP with mineral fertilizer; T4IV -cultivation fertigated with the vinasse supplying NPK. In the cycle of the first ratoon cane, there was no effect of treatments on the variables, already in the subsequent cycles, the T2I and T3Iv showed higher numbers of tillers, 17.4 and 17.2 tiller m -1 , in the second ratoon cane and 16.6 and 16.0 tiller m -1 in the third ratoon cane, respectively. The stem yield was amended with the T4IV obtaining the higher yield, 179.6 Mg ha -1 , in the second ratoon cane, and the T2I and T3Iv in the third ratoon cane, 151.5 and 151.0 Mg ha -1 , respectively. There was no treatment effect on the technological quality and in the second ratoon cane the T3Iv and T4IV showed higher yield of sugar, 25 and 25.9 Mg ha -1 , respectively.

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Section: Methodsunclassified

Cana-de-açúcar fertirrigada com vinhaça via irrigação por gotejamento subsuperficial em três ciclos de cana-soca

Barbosa

Arruda²,

Pires³

et al. 2013

Rev. bras. eng. agríc. ambient.

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“…As a result, the crop develops and grows faster with increasing temperature, even when temperatures are so high that the plant is unlikely to function effectively. For most current climates this algorithm produced reasonable results because temperatures seldom exceeded optimal (about 30 to 35 °C, van Dillewijn, 1952;Liu et al, 1998;Ebrahim et al, 1998;Keating et al, 1999;Bonnet, 2014) of the relevant plant processes.…”

Section: Model Limitationsmentioning

confidence: 96%

Simulated impacts of climate change on water use and yield of irrigated sugarcane in South Africa

Jones

Singels

Ruane

2015

Agricultural Systems

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Reliable predictions of climate change impacts on water use, irrigation requirements and yields of irrigated sugarcane in South Africa (a water-scarce country) are necessary to plan adaptation strategies. Although previous work has been done in this regard, methodologies and results vary considerably. The objectives were (1) to estimate likely impacts of climate change on sugarcane yields, water use and irrigation demand at three irrigated sugarcane production sites in South Africa (Malelane, Pongola and La Mercy) for current and future (2070-2100) climate scenarios, using an approach based on the Agricultural Model Intercomparison and Improvement Project (AgMIP) protocols; and (2) to assess the suitability of this methodology for investigating climate change impacts on sugarcane production. 2Future climate datasets were generated using the Delta downscaling method and three Global Circulation Models (GCMs) assuming atmospheric CO 2 concentration [CO 2 ] of 734 ppm (A2 emissions scenario). Yield and water use were simulated using the DSSAT-Canegro v4.5 model.Irrigated cane yields are expected to increase at all three sites (between 11 and 14%), primarily due to increased interception of radiation as a result of accelerated canopy development. Evapotranspiration and irrigation requirements increased by 11% due to increased canopy cover and evaporative demand. Sucrose yields are expected to decline because of increased consumption of photo-assimilate for structural growth and maintenance respiration. Crop responses in canopy development and yield formation differed markedly between the crop cycles investigated.Possible agronomic implications of these results include reduced weed control costs due to shortened periods of partial canopy, a need for improved efficiency of irrigation to counter increased demands, and adjustments to ripening and harvest practices to counter decreased cane quality and optimise productivity.Although the Delta climate data downscaling method is considered robust, accurate and easily-understood, it does not change the future number of rain-days per month. The impacts of this and other climate data simplifications ought to be explored in future work.Shortcomings of the DSSAT-Canegro model include the simulated responses of phenological development, photosynthesis and respiration processes to high temperatures, and the disconnect between simulated biomass accumulation and expansive growth. Proposed methodology refinements should improve the reliability of predicted climate change impacts on sugarcane yield.

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“…The mean daily air temperature ranged from 17 to 29 °C (Figure 1). According to Liu et al (1998), there is variation in estimates for sugarcane base temperature depending of phonological stage and also among cultivars. However, it has been stated that temperatures above 18 °C do not restrict the sugarcane development.…”

Section: Environmental Conditionsmentioning

confidence: 99%

Root growth and distribution in sugarcane cultivars fertigated by a subsurface drip system

Ohashi¹,

Pires²,

Ribeiro

et al. 2015

Bragantia

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Despite of the agronomic importance for water management, few studies of sugarcane roots have been performed under field conditions during the crop cycle. The aim of this study was to determine the cumulative root density (L A ), root distribution on soil profile and the effective rooting depth (ERD) for three sugarcane cultivars using the minirhizotron method. A field experiment was done with sugarcane cultivars IACSP94-2094, IACSP94-2101 and SP79-1011 grown under subsurface drip fertigation. Soil chemical and physical characteristics were also evaluated. Root evaluations were taken at 38, 58, 123, 185 and 205 days during the second ratoon, considering the soil profile until 0.8 m depth. The highest L A and root growth rates were found up to 0.4 m soil layer for all cultivars. Root growth rate varied during the crop cycle, with the highest values being found between 38 and 58 days after ratoon (DAR). There was a genotypic variation in root growth, with IACSP94-2101 showing the highest L A of 12.9 mm cm

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A new technique for determining the thermal parameters of phenological development in sugarcane, including suboptimum and supra-optimum temperature regimes

Cited by 47 publications

References 24 publications

Cana-de-açúcar fertirrigada com vinhaça via irrigação por gotejamento subsuperficial em três ciclos de cana-soca

Cana-de-açúcar fertirrigada com vinhaça via irrigação por gotejamento subsuperficial em três ciclos de cana-soca

Simulated impacts of climate change on water use and yield of irrigated sugarcane in South Africa

Root growth and distribution in sugarcane cultivars fertigated by a subsurface drip system

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