EFEITOS DE DIFERENTES CONDIÇÕES DE ÁGUA SOBRE O CRESCIMENTO DE ARROZ NA FASE DE MUDAS

Palavras-chave: Condição aeróbica. Atividade enzimática. Capacidade fotossintética.

Resumo

A escassez de água levou à adoção de tecnologia de irrigação que economiza água em todo o mundo. A irrigação por gotejamento tem sido usada para o cultivo de arroz em Xinjiang, China. Pesquisadores relataram 12,0 t/ha de rendimento; no entanto, o arroz irrigado por gotejamento produz cerca de 6-8 t/ha na prática, e está claro que a deficiência de água explica essa lacuna. Portanto, o objetivo deste experimento foi comparar o crescimento, as características fotossintéticas e a atividade antioxidante do arroz cultivado em solução nutritiva com potencial hídrico de 0,00, -0,02, -0,05 e -0,09 MPa [0, 2,5, 5,0 e 7,5 % polietilenoglicol (PEG), respectivamente], para determinar as condições ótimas da água para o arroz irrigado por gotejamento. Não houve diferença significativa entre os tratamentos 0, 2,5 e 5,0% de PEG para a taxa de crescimento relativo e o conteúdo relativo de água após 10 e 20 dias. No entanto, os tratamentos de 2,5 e 5,0% de PEG afetaram substancialmente a capacidade fotossintética e a atividade das enzimas antioxidantes após 10 e 20 dias. O tratamento com 7,5% de PEG inibiu o crescimento das brotações. Houve uma redução significativa na atividade das enzimas antioxidantes. O cultivo de arroz que economiza água, como o arroz irrigado por gotejamento, sofreu um leve estresse hídrico de -0,02 a -0,05 Mpa, mas isso não inibiu o crescimento. A quantidade de irrigação deve ser aumentada para obter maiores rendimentos de arroz sob condições de irrigação por gotejamento.

Referências

BAI, R. X. et al. Effect of salinity and soil temperature on the growth and physiology of drip-irrigated rice seedlings. Archives of Agronomy and Soil Science, v. 63, n. 4, p. 513-524, 2017.

BARRS, H. D.; WEATHERLEY, P. E. A re-examination of the relative turgidity technique for estimating water deficits in leaves. Australian Journal of Biological Sciences, v. 15, n. 3, p. 413-428, 1962.

BATES, L. S.; WALDREN, R. P.; TEARE, I. D. Rapid Determination of Free Proline for Water-Stress Studies. Plant and Soil, v. 39, n. 1, p. 205-207, 1973.

BEERS, R. F.; SIZER, J. F. Catalase assay with special reference to manometric methods, Science, v. 117, n. 3052, p. 710-712, 1953.

CEYLAN, H. A.; TURKAN, I.; SEKMEN, A. H. Effect of Coronatine on Antioxidant Enzyme Response of Chickpea Roots to Combination of PEG-Induced Osmotic Stress and Heat Stress. Journal of Plant Growth Regulation, v. 32, n. 1, p. 72-82, 2013.

CHAVES, M. M. et al. How Plants Cope with Water Stress in the Field? Photosynthesis and Growth. Annals of Botany, v. 89, n. 7, p. 907-916, 2002.

CHENG, Y.W. Study on characteristics of the water requirement and yield componentsin spring wheat under drip irrigation in Northern Xinjiang. 2010. 83 f. Dissertation (Masters of Agriculture: Crop Physiology and Ecological) - Shihezi University, China. 2010.

DIEZEL, W.; KOPPERSCHIAGER, G.; HOFMANN, E. An improved procedure for protein staining in polyacrylamide gels with a new type of Coomassie Brilliant Blue. Analytical Biochemistry, v. 48, n. 2, p. 617-620, 1972.

EKMEKCI, Y.; TANYOLAC, D.; AYHAN, B. Effects of cadmium on antioxidant enzyme and photosynthetic activities in leaves of two maize cultivars. Journal of Plant Physiology, v. 165, n. 6, p. 600-611, 2008.

GIANNOPOLITIS, C. N.; RIES, S. K. Superoxide Dismutases: I. Occurrence in Higher Plants. Plant Physiology, v. 59, n. 2, p. 309-314, 1977.

GUO, Q. R.; CHEN, L. Analysis of advantage and prospects for rice drip irrigation under plastic film cultivation development in China. Chinese rice, v. 18, n. 5, p. 36-39, 2012.

GUNES, A. et al. O Salicylic acid induced changes on some physiological parameters symptomatic for oxidative stress and mineral nutrition in maize (Zea mays L.) grown under salinity. Journal of Plant Physiology, v. 164, n. 6, p. 728-736, 2007.

FERREIRA, A. C. et al. Estresse hídrico e salino na germinação de sementes de feijão-caupi (vigna unguiculata cv. Brs tumucumaque). Revista Caatinga, v. 30, n. 4, p. 1009-1016, 2017.

HOAGLAND, D. R.; ARNON, D. I. The water-culture method for growing plants without soil. Circular: California Agricultural Experiment Station Circular, University of California: Berkely, 1950. v. 347, chap. 2, p. 32.

HEATH, R. L.; PACKER, L. Photoperoxidation in isolated chloroplasts: I. Kinetics and stoichiometry of fatty acid peroxidation. Archives of biochemistry and biophysics, v, 125, n. 1, p. 189-198, 1968.

HE, H. B. et al. Rice Photosynthetic Productivity and PSII Photochemistry under Nonflooded Irrigation. The Scientific World Journal, v. 10, n. 1, p. 1-15, 2014.

PIGNATELLO, J. J. et al. Advanced Oxidation Processes for Organic Contaminant Destruction Based on the Fenton Reaction and Related Chemistry. Critical Reviews in Environmental Science and Technology, v. 36, n. 1, p. 1-84, 2006.

KRAUS, T. E.; FLETCHER, R. A. Paclobutrazol Protects Wheat Seedlings from Heat and Paraquat Injury. Is Detoxification of Active Oxygen Involved?. Plant and Cell Physiology, v. 35, n. 1, p. 45-52, 1994.

LAMPAYAN, R. M. et al. Adoption and economics of alternate wetting and drying water management for irrigated lowland rice. Field Crops Research, v. 170, n. 1, p. 95-108, 2015.

LEE, T. J.; PIELKE, R. A. Estimating the soil surface specific humidity. Journal of Applied Meteorology, v. 31, n. 5, p. 480-484, 1992.

LUM, M. S. et al. Effect of drought stress on growth, proline and antioxidant enzyme activities of upland rice. Japs Journal of Animal & Plant Sciences, v. 24, n. 5, p. 1487-1493, 2014.

MICHEL, B. E.; KAUMFMANN, M. R. The osmotic potential of polyethylene glycol 6000. Plant physiology, v. 51, n. 5, p. 914-916, 1973.

MISHRA, P.; BHOOMIKA, K.; DUBEY, R. S. Differential responses of antioxidative defense system to prolonged salinity stress in salt-tolerant and salt-sensitive Indica rice (Oryza sativa L.) seedlings. Protoplasma, v. 250, n. 1, p. 3-19, 2013.

NELSON, A.; WASSMANN, R.; SANDER, B.O. Climate-Determined Suitability of the Water Saving Technology" Alternate Wetting and Drying" in Rice Systems: A Scalable Methodology demonstrated for a Province in the Philippines. PloS one, v. 23, n. 10, p. 145-268, 2015.

SIKUKU, P. A. et al. Chlorophyll fluorescence, protein and chlorophyll content of three nerica rainfed rice varieties under varying irrigation regimes. ARPN Journal of Agricultural and Biological Science, v. 5, n. 1, p. 19-25, 2010.

WANG, J. et al. China’s water–energy nexus: greenhouse-gas emissions from groundwater use for agriculture. Environmental Research Letters, v. 7, n. 1, p. 14035-14044, 2012.

ZHANG, X. J. et al. Effect of HCO3- on rice growth and iron uptake under flood irrigation and drip irrigation with plastic film mulch. Journal of Plant Nutrition and Soil Science, v. 178, n. 6, p. 944-952, 2015.

ZHOU, B. et al. Nitric oxide is involved in abscisic acid-induced antioxidant activities in Stylosanthes guianensis. Journal of Experimental Botany, v. 56, n. 422, p. 3223-3228, 2005.

ZHU, Q. C. et al. Nutrient availability in the rhizosphere of rice grown with plastic film mulch and drip irrigation. Journal of Soil Sience and Plant Nutrition, v. 13, n. 4, p. 943-953, 2013.

Publicado
2019-05-21
Seção
Engenharia Agrícola