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首页> 外文期刊>Horticultura Brasileira >Gotejamento por pulsos e laminas de fertirriga??o nas rela??es hídricas do coentro
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Gotejamento por pulsos e laminas de fertirriga??o nas rela??es hídricas do coentro

机译：香菜水分关系中的脉冲和施肥叶片滴落

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摘要

This study was installed to evaluate the effect of pulse drip irrigation under different water depth levels (fertigation) in the main water relations of coriander crop ( Coriandrum sativum ). The experiment was installed under protected environment conditions, at UFRPE, Recife, Brazil. The experimental design was randomized blocks in a 2x5 factorial scheme, with three replications. Treatments consisted of two application types (continuous and pulsed irrigation), and five water depths with replacement of 40, 60, 80, 100 and 120% of crop evapotranspiration (ETc). Water demand was estimated through water balance using a drainage lysimetry. Six irrigation pulses were defined with a 60-minute-rest interval between two successive applications. Plants irrigated by pulses showed higher water productivity values (fresh and dry mass), higher water content (shoot and root), higher shoot mass production index and lower root mass production index and root-shoot ratio. The reduction of applied fertigation water depths increased plant water stress index. The irrigation pulses used ensured water content able to maintain the crop’s marketable quality. Pulse application in irrigation system increased shoot mass production index and reduced root mass production index.
机译：这项研究的目的是评估香菜作物（Coriandrum sativum）的主要水分关系中不同水深水平（施肥）下脉冲滴灌的效果。实验安装在巴西累西腓UFRPE的受保护环境条件下。实验设计是采用2x5析因方案的随机块，具有三个重复。处理包括两种应用类型（连续灌溉和脉冲灌溉）和五种水深，分别替代了作物蒸散量（ETc）的40％，60％，80％，100％和120％。使用排水量测定法通过水平衡来估算需水量。定义了六个灌溉脉冲，两次连续施用之间间隔60分钟。通过脉冲灌溉的植物显示出较高的水分生产率值（新鲜和干重），较高的水分含量（枝条和根部），较高的枝条量产指数和较低的根部量产指数和根茎比。施肥水深的减少会增加植物的水分胁迫指数。所使用的灌溉脉冲确保了水分含量能够维持农作物的适销质量。在灌溉系统中脉冲施用可增加枝条大量生产指数，降低根系大量生产指数。

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