The reaction of two varieties of sugarcane to water stress

Inman-Bamber, N. G.; Jager, J. M. de

doi:10.1016/0378-4290(86)90043-2

Cited by 29 publications

(10 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It was also assumed that leaf initiation continues when leaf extension ceases owing to water stress (Milford, Pocock & Riley, 1985) and that up to three leaves can appear simultaneously when the stress is relieved. The continued initiation of leaves during water stress was evident in the unpublished data given in Figure 2 obtained from crops of sugar-cane that were either well irrigated or subjected to two periods of severe water stress (Inman-Bamber, 1986).…”

Section: Leaf Area Per Stalkmentioning

confidence: 88%

A growth model for sugar-cane based on a simple carbon balance and the CERES-Maize water balance

Inman-Bamber

1991

South African Journal of Plant and Soil

112

View full text Add to dashboard Cite

The economic optimum harvest age for sugar-cane depends to a large extent on how rates of photosynthesis and respiration change with age. A simple model of the carbon balance in which a constant photosynthetic efficiency was assumed, accounted to a large extent for dry matter accumulation by cv. NC0376 grown under irrigation. Rain-fed crops of this cultivar were simulated by linking the model of the carbon balance to the CERES-Maize water balance routine. The combined model was validated with data from a comprehensive growth analysis experiment undertaken by staff of the SASA Experiment Station in the 1960's. Dry matter accumulation was explained satisfactorily without changing the coefficients for gross photosynthesis (P = 0.082 PAR MJ m-2), maintenance (0.242 P g) or growth respiration (0.003 x total phytomass). Leaf area in~ex and leaf appearance data indicated that the assumptions regarding leaf area development were valid. The observed fluctuations in water content of the top 300 mm of soil were well explained by the CERESmaize water balance but the gypsum block resistance readings in deeper layers indicated the presence of water that on some occasions was not explained by the model. It was concluded that the sucrose accumulation rate on many farms may have declined because of the recent reduction in the age at harvest in the sugar industry. Die ekonomiese optimum oes ouderdom van suikerriet hang in 'n groot mate af van hoe die fotosintese-en respirasietempos met ouderdom verander. Die akkumulasie van droa materiaal vir die varieteit NC0376 wat onder besproeiing verbou is, is met 'n eenvoudige koolstofbalansmodel, waarin 'n konstante fotosintese doeltreffendheid veronderstel is, bereken. Droaland oeste vir hierdie kultivar is gesimuleer deur die koolstofbalansmodel aan die waterbalansmodel van CERES-Maize te koppel. Hierdie gekombineerde model is geevalueer met data vanaf 'n omvattende groei-analiseproef wat in die 1960's deur personeel van die SASA se Navorsingstasie onderneem is. Die akkumulasie van droa materiaal is bevredigend bereken sonder dat die koaffisiante vir bruto fotosintese (P = 0.082 PAR MJ m-2) , onderhoud-(0.242 P g) of groeirespirasie (0.003 x totale plant massa) verander is. ~Iaaroppervlakte-indeks en blaarverskyningsdata het aangedui dat die aannames ten opsigte van die ontwikkeling van blaaroppervlakte, geldig was. Die waargenome fluktuering van waterinhoud in die boonste 300 mm grondlaag was goed deur die CERES-Maize waterbalansmodel beskryf, maar water wat deur die gips weerstandsblokke in die dieper grondlae aangedui is, is soms nie deur die model beskryf nie. Die gevolgtrekking was dat die sukrose-akkumulasietempo op baie plase moontlik afgeneem het, as gevolg van die onlangse vermindering van die oesouderdom in die suikerbedryf.

show abstract

Section: Leaf Area Per Stalkmentioning

confidence: 88%

A growth model for sugar-cane based on a simple carbon balance and the CERES-Maize water balance

Inman-Bamber

1991

South African Journal of Plant and Soil

112

View full text Add to dashboard Cite

show abstract

“…Em termos de umidade, evidencia-se que no 1 o ano de amostragem, a umidade do ar é menor que no início do 2 o ano, assim como a umidade do solo e a umidade da folha inicialmente são baixas no 1 o ano (Figuras 11 e 12). Portanto, é possível destacar que a diferença de umidade entre o 1 o e o 2 o ano é o fator determinante para as diferenças observadas, em termos de matéria seca de folhas, confirmando a importância da disponibilidade de água nos momentos iniciais da cultura conforme relatado por Inman-Bamber & De Jager (1986).…”

Section: Graus-dia ( O C Dia)unclassified

Crescimento da parte aérea de cana crua e queimada

Alvarez

Castro

1999

Sci. agric. (Piracicaba, Braz.)

View full text Add to dashboard Cite

nd years of second ratoon cane crop, by means of adapted curves. The research was performed in Morro Agudo, SP, Brazil from July 1995 to July 1997. The cultivar was the SP 70 -1143. As growth indicators the following biometric indexes were used: number of tillers, number of leaves, dry matter of stalks, and leaves and leaf area index (LAI). For each treatment, 4 areas were used, each one being considered a replication. Polynomial regression and non-linear regression were used to adjust the data to the growth curves. The growth in the first cycle was similar for the green and the burned canes. At the beginning of the second cycle the green cane growth was greater, while at the end, the growth was greater for the burned cane. Tillering of the green cane did not present significant differences that confirm the negative influence of the straw in the ratoon cane crop. The climatological factors, separately, did not promote changes in the growth cycles, that could identify a general tendency. The differences in the development expressed on the curve of growth from the 1 st to the 2 nd year are due to the climatological factors, for both, the green and the burned cane. Key words: sugarcane, ecophysiology, burned, environmental impact INTRODUÇÃO A produção de cana-de-açúcar tem sido muito incrementada no Brasil para a fabricação de açúcar, mas principalmente para obtenção de álcool, ao mesmo tempo que continua aumentando a área plantada. Esse aumento gera maior gama de questões a serem respondidas na cultura da cana-de-açúcar. Entre elas, há a influência sobre a produtividade e sobre o impacto ambiental, causados pela queima da cana. Em cidades que são circundadas por canaviais, foi estabelecido o decreto 28.895/88 que proibiu a queima de cana-de-açúcar em um raio inferior a 1 km em torno da zona urbana.Furlani Neto (1994) ao comparar cana crua e cana queimada destaca como vantagens da primeira: maior proteção do solo contra erosão, redução do uso de herbicidas, melhor matéria-prima para indústria, maior incorporação

show abstract

“…The WP used varies with genotype, 1500 kPa for M. Â giganteus and 3000 kPa for M. sinensis (Clifton-Brown & Lewandowski, 2000b). The onset of drought stress on LAI is earlier (Weng, 1993& Inman-Bamber & De Jager, 1986Smit & Singels, 2006), so the CPT end point is set empirically at half of the WP for this factor by matching the experimentally observed slowing of leaf expansion with remaining soil water.…”

Section: Deriving Meteorological Input Variables From Available Datamentioning

confidence: 99%

The development of MISCANFOR, a new Miscanthus crop growth model: towards more robust yield predictions under different climatic and soil conditions

Hastings¹,

Clifton‐Brown²,

Wattenbach³

et al. 2009

GCB Bioenergy

168

208

View full text Add to dashboard Cite

Miscanthus Â giganteus (Greef et Deu.), a perennial rhizomatous grass, native of SE Asia, has been trialed Europe-wide as a potential bio-energy crop. Plant growth models have been developed to match previously reported field experiments. These models have been used to extrapolate Miscanthus yields to other environments. Although the models use similar process descriptions, the parameters used to match the experimental data vary from site to site. This paper describes the development of universal process descriptions that use genotype-specific parameters to predict yields in a wide range of environments. Using these, we develop a new model, MISCANFOR, from an existing model MISCANMOD by improving process descriptions for light interception by the canopy and the impact of temperature and water stress on radiation use efficiency. Genotypespecific process descriptions for plant growth phase, photo-period sensitivity, thermal time, temperature dependant radiation-use efficiency, drought and frost kill predictions, nutrient repartition to the rhizome, and moisture content at harvest are added. Predictions made with MISCANFOR are compared with MISCANMOD for 36 experimental data sets for a wide variety of soils and climatic conditions in Europe. MISCANFOR matches field experiments with an r 2 5 0.84 compared with 0.64 for MISCANMOD, building confidence that the new model will be better able to predict Miscanthus yields for other areas and future IPCC climate scenarios. This model has identified photoperiod sensitivity in addition to drought resistance and frost tolerance as parameters for crop improvement to extend the range of climatic conditions under which this crop can be grown economically.

show abstract

The reaction of two varieties of sugarcane to water stress

Cited by 29 publications

References 16 publications

A growth model for sugar-cane based on a simple carbon balance and the CERES-Maize water balance

A growth model for sugar-cane based on a simple carbon balance and the CERES-Maize water balance

Crescimento da parte aérea de cana crua e queimada

The development of MISCANFOR, a new Miscanthus crop growth model: towards more robust yield predictions under different climatic and soil conditions

Contact Info

Product

Resources

About