W. L. Simões, F. Angelotti, Miguel Julio Machado Guimarães, Jucicléia Soares da Silva, R. M. E. Silva, J. M. R. Barros
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引用次数: 0
摘要
摘要考虑到气候参数的变化直接影响作物产量，本研究旨在评估二氧化碳浓度、温度和土壤水分有效性的变化对产量、水分利用效率和洋葱(Allium cepa L. cv.)产量的影响。国际音标品质。在不同温度(18-24-30℃、22-28-34℃和26-32-38℃)条件下，在Phytotron生长室内对4种土壤水分有效性水平(40、60、80和100%)和2种大气CO2浓度(770和390 ppm)进行了评估。并对水分利用效率、球茎直径和重量、茎干质量、果肉硬度、可溶性固形物含量、pH值和可滴定酸度进行了评价。温度的升高降低了产量，土壤水分的增加增加了IPA 11洋葱的产量。温度条件为18 ~ 24 ~ 30℃，水分利用率为76.72%时，洋葱作物水分利用效率最高。
Water-use efficiency and onion quality in future climate scenarios
ABSTRACT Considering that changes in climatic parameters directly interfere in crop yields, this study aimed to evaluate the impact of changes in carbon dioxide concentrations, temperature and soil water availability on production, water-use efficiency and onion (Allium cepa L. cv. IPA 11) quality. Four levels of soil water availability (40, 60, 80 and 100 %) and two concentrations of atmospheric CO2 (770 and 390 ppm) were evaluated in three experiments with different temperature regimes (18-24-30, 22-28-34 and 26-32-38 ºC), in Phytotron growth chambers. The water-use efficiency, bulb diameter and weight, shoot dry weight, pulp frmness, soluble solids content, pH and titratable acidity were also evaluated. The increase in temperature reduces the production, and a higher soil water availability increases the production of IPA 11 onion bulbs. The temperature regime of 18-24-30 ºC and the water availability of 76.72 % provide the best water-use efficiency for the onion crop.
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