微咸水水培条件下菜花的生长与产量

M. G. D. Silva, Leandro F. da Costa, T. M. Soares, H. Gheyi
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引用次数: 1

摘要

从历史上看,在日益加剧的气候变化情景下,干旱和半干旱地区的干旱日益严重,限制了灌溉的利用。作为这些地区的替代方案,尽管存在土壤盐碱化的严重风险,以及作物产量和质量的损失,但仍使用了微咸水。因此,采用适当的技术应减轻或控制盐胁迫造成的影响。因此,本研究在2019年7月至10月(冬春季节)和2019年10月至2020年1月(春夏季节)分别进行了营养膜水培技术(NFT)微咸水栽培花椰菜的试验研究。采用随机区组设计,6个重复,分别处理0.3 -对照(无NaCl)、1.5、2.5、3.5、4.5和5.5 dS - m-1(有NaCl) 6个ECw值的菜花植株。对于花序收获时叶片面积,冬春试验和春夏试验的ECw每dS m-1增量分别减少7.22%和6.41%。花椰菜花序的质量损失在春夏试验中更为明显,根据所使用的ECw而有所不同。因此,在最高5.5 dS - m-1的ECw条件下,水培菜花是可行的;然而,在最热的季节,这些水应该保留下来,只用于制备营养液或补充植物消耗的水。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Growth and yield of cauliflower with brackish waters under hydroponic conditions
ABSTRACT Historically, and in the aggravating climate change scenario, droughts are increasingly severe in arid and semi-arid regions, limiting the use of irrigation. As an alternative for these regions, brackish waters have been used, despite the severe risks of soil salinization, as well as losses in crop production and quality. Thus, the adoption of adequate technologies should mitigate or control the impacts caused by salt stress. Therefore, in the present study two experiments were conducted to evaluate the cultivation of cauliflower with brackish waters using a nutrient film technique (NFT) hydroponic system from July to October 2019 (winter-spring) and from October 2019 to January 2020 (spring-summer). Cauliflower plants were subjected to six values of ECw: 0.3 - control (without NaCl), 1.5, 2.5, 3.5, 4.5, and 5.5 dS m-1 (with NaCl), in a randomized block design with six replicates. For the leaf blade area at inflorescence harvest, reductions per dS m-1 increment in ECw of 7.22 and 6.41% were found in the winter-spring and spring-summer experiments, respectively. The quality losses of cauliflower inflorescences were more pronounced in the spring-summer experiment, varying according to the ECw used. Therefore, it is possible to grow cauliflower hydroponically under ECw of up to 5.5 dS m-1; however, in the hottest seasons these waters should be reserved and used only for the preparation of nutrient solutions or replacement of water consumed by plants.
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