Devido ao déficit hídrico, a produtividade do algodoeiro foi significantemente reduzida, com os piores resultados para o déficit durante o florescimento (início e pico). Para os períodos de déficit hídrico a temperatura do dossel esteve sempre acima da temperatura ótima para o metabolismo do algodoeiro. Os resultados mostraram maiores temperaturas do dossel durante o déficit hídrico, quando comparados a testemunha. A temperatura do dossel foi obtida usando sensores sem fio de temperatura infravermelho SmartCrop®. Foram aplicados períodos de déficit hídrico de 15 dias nos seguintes estádios fenológicos: Botão floral, Início do florescimento, Pico do florescimento e Abertura do Capulhos, além da testemunha. O objetivo deste estudo foi avaliar a temperatura do dossel do algodoeiro sob déficit hídrico em diferentes estágios fenológicos e determinar os graus dia acumulados a partir da temperatura do dossel. TEMPERATURA DO DOSSEL E GRAUS DIA ACUMULADOS EM ALGODOEIRO SOB DÉFICIT HÍDRICO 2 RESUMO A temperatura do dossel é um dos melhores assimiladores da saúde das plantas e tem sido usada com sucesso para manejo da irrigação. Keywords: Irrigation Phenological cycle Stress Environmental conditions Infrared thermometry. The period for fiber thickening was also influenced by the variation in canopy temperature due to water stress, which may reflect decline in fiber quality. Accumulated degree days also varied according to water stress, with a shortened phenological cycle for treatments with water deficit in comparison to the control without stress. As a result of the stress caused by water deficit, cotton yield was significantly reduced, with the higher yield loses recorded when applied deficit occurred during flowering stages (beginning and peak). For water deficit periods, canopy temperature values were always above the optimum temperature for cotton metabolism. The results showed higher canopy temperatures during water deficit periods. Canopy temperature was obtained using SmartCrop® wireless infrared temperature sensors. It was applied water deficit periods of 15 days at the following phenological stages: First Square, First Flower, Peak Bloom and Opening Bolls and control treatment. Therefore, the objective of this study was to evaluate the canopy temperature of cotton plants under water stress at different stages of the crop cycle and to determine the accumulated degree days based on canopy temperature. 4617, 50th Street, Lubbock, Texas, 79414, e-mail: 5Embrapa Algodão, Rua Osvaldo Cruz, 1173, Centenário, Campina Grande – PB, CEP: 58428-095, e-mail: 1 ABSTRACT Canopy temperature is one of the best integrators of plant health and has been successfully used for irrigation scheduling. Francisco Mota, 572 - Bairro Costa e Silva, Mossoró - RN, CEP: 59625-900, e-mail: 3Embrapa Algodão, Rua Osvaldo Cruz, 1173, Centenário, Campina Grande – PB, CEP: 58428-095, e-mail: 4SmartFieldTM, Inc, n. The results demonstrated that green wall has an excellent effect on buildings towards temperature and noise pollution reduction.ĬANOPY TEMPERATURES AND ACCUMULATED DEGREE DAYS ON COTTON PLANTS UNDER WATER DEFICIT JOÃO HENRIQUE ZONTA1 RUDAH MARQUES MANIÇOBA2 ZIANY NEIVA BRANDÃO3 MARIO ANASTASIO CARRILLO4 E JOSÉ RENATO CORTEZ BEZERRA5 1Embrapa Algodão, Rua Osvaldo Cruz, 1173, Centenário, Campina Grande – PB, CEP: 58428-095, e-mail: 2Engenharia Agrícola, Universidade Federal Rural do Semiárido, Av. The noise reduction by CGW in high (75-80 dB), medium (50-55 dB) and low (30-35 dB) sound pressure level was 12.4, 7.5 and 5.7 dB, respectively, and 15.6, 9.3 and 7.0 dB, respectively, by PGW. The results revealed that, the average temperature reduction by CGW and PGW were 4.9 ± 1.3 and 16.6 ± 7.4%, respectively, under no irrigation condition, and 18.4 ± 9.4 and 23.8 ± 8.7%, respectively, under irrigation condition. Besides, the biological characteristics of Parthenocissus tricuspidata and Sedum lineare Thunb were also analysed to substantiate the temperature and noise reduction performance of these plants. This study investigated and compared the performance of two types of climbing green wall (CGW) and paving green wall (PGW) vegetation for temperature and noise reduction. Incorporation of green wall in buildings is considered to be an effective method to reduce temperature and mitigate environmental pollution. The abundance of heat-trapping asphalt and concrete, smog, and heat emitted from buildings and vehicles is one of the major reasons for the prevailing high temperature, air and noise pollution in cities.
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