Sugarcane productivity simulation under different planting times by DSSAT/CANEGRO model in Alagoas, Brazil

Abstract

In sugarcane crop, it is important to search for tools to assist in the agricultural management to increase the yield and minimize the costs of production. Dynamics growth models are tools that help management, supporting the analysis of making complex decisions, allowing reducing cost, time and human resources. Thus, the aim of this study was to determine the best time of planting for the sugarcane crop using the DSSAT/CANEGRO model for the region of Rio Largo, state of Alagoas, Northeastern Brazil. The crop, soil and meteorological data used in the simulations were obtained in field experiment carried out at sugarcane cropping in years 2003 and 2006. The sugarcane varieties used in the experiment was RB93509 in two crop cycles (plant crop and ratoon crop). Planting was held on October 1, 2003 and the 1st harvest (plant crop) took place on October 1, 2004 and the 2nd harvest (ratoon crop) took place on February 25, 2006. The model performance was quantified by different statistical tests (Error Model, Medium Error Quadratic Root and Determination Coefficient). The model satisfactorily simulated the ​​fresh (0.6 and 11.0%) and dry matter production (-19.2 and 18.1%), tillering (R2 = 0.69 and 0.80), plant height (0.0 and -19.1%) and leaf area index (R2 = 0.87 and 0.73). The best planting time for sugarcane crop was on October 30. However, in El Niño and La Niña years of strong intensity, the best planting time was on January 15 and September 30, respectively.

Dinâmica produtiva da cultura da cana-de-açúcar em um município da zona da mata alagoana

“…Assim, ações que viabilizem um melhor desempenho agronômico dessa cultura no município devem ser incentivadas, uma vez que maiores produtividades estão intimamente ligadas com maior produção de açúcar e álcool, bem como maior desenvolvimento econômico. É essencial melhorar o nível de tecnologia utilizado no cultivo da cana-deaçúcar no estado de Alagoas para aumentar o rendimento dos canaviais (CARVALHO et al, 2018).…”

“…Na região Nordeste, o estado de Alagoas se destaca como o maior produtor dessa cultura, bem como figura como o quinto maior produtor brasileiro. No entanto, Alagoas já foi o segundo maior produtor nacional de cana-de-açúcar, perdendo essa posição devido a estagnação de suas áreas de cultivo nas últimas duas décadas, enquanto o país dobrou sua área plantada (CARVALHO et al, 2018).…”

Sugarcane Yield Estimation Using Satellite Remote Sensing Data in Empirical or Mechanistic Modeling: A Systematic Review

“…In Brazil, ref. [47] determined the best planting date for sugarcane for a producing region in the state of Alagoas, northeast Brazil. The authors performed simulations for different dates, observing that the model can simulate crop growth variables and indicate the best planting window in different Brazilian regions in regular years and years affected by El Niño and La Niña events.…”

“…Ref. [47] indicate that the DSSAT/CANEGRO model has some limitations for crop simulations under rainfed conditions; therefore, further studies on the effect of drought on the development of LAI and canopy should be conducted. Ref.…”