Irrigation management strategy for Prata-type banana

Abstract

A B S T R A C TThis study aimed to analyze different irrigation strategies in two cultivars of the banana crop. The study was conducted in four production cycles of 'Prata-Anã' and 'BRS Platina' bananas. The applied irrigation depths (ID) were obtained by the model ID = K x LA x ETo, where K is an empirical transpiration constant of 0.20; 0.35; 0.50 and 0.65 for the strategies 1, 2, 3 and 4, respectively; LA is the leaf area of mother and daughter plants of 'Prata-Anã' and ETo is the reference evapotranspiration. The strategy 5 was obtained according to the crop evapotranspiration, ETc = ETo x Kc, where Kc is the crop coefficient. Drip irrigation system was used, with two laterals per plant row and emitters with flow rate of 8 L h -1 , spaced at 0.50 m. It was found that 'Prata-Anã' is more efficient than 'BRS Platina' in terms of water use and the model for irrigation management, ID = 0.35 x LA x ETo, is recommended to optimize water use by 'Prata-Anã' and 'BRS Platina' bananas, with increase in water use efficiency and maintenance of yield. The same model, with K coefficient equal to 0.50, makes it possible to obtain yield and water use efficiency equal to those obtained with irrigation management based on the ETc. Estratégias de manejo de irrigação para bananeira tipo Prata R E S U M OObjetivou-se, com o presente estudo, avaliar diferentes estratégias de irrigação para bananeiras 'Prata-Anã' e 'BRS Platina' em quatro ciclos produtivos. As lâminas de irrigação aplicadas (LA) foram obtidas pelo modelo LA = K x AF x ETo em que K é a constante empírica de transpiração de 0,20; 0,35; 0,50 e 0,65 para as estratégias 1, 2, 3 e 4, respectivamente; AF, área foliar das plantas mãe e filha da 'Prata-Anã' e ETo, evapotranspiração de referência. A estratégia 5 foi obtida conforme a evapotranspiração da cultura, ETc = ETo x Kc, sendo Kc seu coeficiente. Utilizou-se o sistema de irrigação por gotejamento com duas laterais por fileira de planta, com emissores de 8 L h -1 espaçados 0,50 m totalizando 10 gotejadores por planta. Verificou-se que a 'Prata-Anã' é mais eficiente no uso da água cujo modelo para manejo de irrigação, LA = 0,35 x AF x ETo é indicado para otimizar o uso da água em bananeiras 'Prata-Anã' e 'BRS Platina' com aumento da eficiência de uso da água e manutenção da produtividade. O mesmo modelo possibilita com a constante K igual a 0,50, a obtenção de produtividades e de eficiência de uso da água iguais às obtidas com manejo de irrigação com base na ETc.

Precocity, yield and water-use efficiency of banana plants under planting densities and irrigation depths, in semiarid region

“…Similar findings on reducing irrigation depths were obtained by Santos et al (2016), who observed, in Prata-Anã and BRS Platina, a decrease in the water-use efficiency with increasing irrigation depths, since yield is not consistent with increasing e-ISSN 1983-4063 -www.agro.ufg.br/pat -Pesq. Agropec.…”

“…Conversely, Donato et al (2015b) reported that well-managed banana plantations under better conditions of climate, such as maximum temperatures below 34 ºC, less windrelated damage and higher relative humidity, i.e., favoring a higher carboxylation and instantaneous water-use efficiency (Donato et al 2015a, Arantes et al 2016, Ramos et al 2018, may yield more than 40 t ha -1 cycle -1 (high yield > 32 t ha -1 cycle -1 ), particularly from the second production cycle on. The lack of irrigation depth effect on the yield of the first production cycle was also observed by Santos et al (2016), who, by studying Prata-Anã and BRS Platina, did not verify differences in yield between the two cultivars or lack of effects for lowering the irrigation depth, although the yield recorded herein (20.25 t ha -1 ) was higher than that found by Santos et al (2016) (9.59 t ha -1 ). It is worth noting that, in the experiment carried out by Santos et al (2016), the planting density was 1,333 plants ha -1 and the plants were watered by drip irrigation.…”

“…The lack of irrigation depth effect on the yield of the first production cycle was also observed by Santos et al (2016), who, by studying Prata-Anã and BRS Platina, did not verify differences in yield between the two cultivars or lack of effects for lowering the irrigation depth, although the yield recorded herein (20.25 t ha -1 ) was higher than that found by Santos et al (2016) (9.59 t ha -1 ). It is worth noting that, in the experiment carried out by Santos et al (2016), the planting density was 1,333 plants ha -1 and the plants were watered by drip irrigation. In Pentecoste, Ceará state, Brazil, Azevedo & Bezerra (2008) verified that yields of Prata-Anã and Pacovan linearly increased as the irrigation depth increased.…”

Balance design for robust foliar nutrient diagnosis of “Prata” banana (Musa spp.)

“…Plant density averaged 1332 plants ha −1 (4.0 m × 2.0 m double row, 2.5 m between plants). Plants were sprinkler-irrigated at a crop evapotranspiration ( ET c ) rate proportional to potential evapotranspiration ET 0 ( ET c = K C ET 0 , where K C varied during the season) 6 , 57 . To sustain high yield and quality, the banana clump was restricted to a few fruiting plants by yearly pruning.…”

Quality of dried banana produced from three cultivars 'Prata-Anã', 'FHIA-18'and 'BRS Platina' under different irrigation levels

“…This genotype produces fruits of greater length and heavier when produced in the absence of water deficit (Castricini et al, 2012) which explains the greater length of dried banana in the highest applied irrigation level On the other hand, irrigation effect was not observed in the length (p>0.05) for dried bananas of Prata-Anã and FHIA-18 genotypes, whose values were 101.56 and 109.09 mm, respectively. Banana 'Prata-anã' proved to be less sensitive to moderate hydric stress than 'BRS Platina' banana (Santos et al, 2016). Unlike Braga Filho et al (2011) who found in a study with the variety FHIA, influence of irrigation in the fruit length.…”