Irrigation scheduling and its impacts on Freesia-water productivity, vegetative and flowering parameters under greenhouse cultivation

I. Abdelfattah, E. Attia, Ghada M. Elbanna
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引用次数: 4

Abstract

A pot experiment under greenhouse was conducted during 2017/18 and 2018/19 at Sakha Horticulture Research Station, North Nile Delta to find the impact of different irrigation scheduling on freesia-water productivity, its yield, vegetative, flowering, corms parameters and chlorophyll content. Therefore, four irrigation intervals of 3, 6, 9 and 12 days with four irrigation levels of 100 (Control), 120, 80, and 60% cumulated pan evaporation (CPE) were tested. Results showed that irrigation scheduling significantly influenced the stated items. The mean seasonal irrigation water for the highest economical yield of fresh weight of spike was 12.58 cm, while it was 14.05 cm for new corm under 9 days and 60% or 12 days and 80%, respectively with mean value of 13.32cm. Regarding irrigation water productivity (IWP), the stated irrigation scheduling gave the highest IWP for spike (0.7g.cm-1) and new corm of 0.43 g.cm-1. For freesia marketable yield of fresh weight of spike and new corm, maximum spike weight was obtained from 9 days and 60% and for fresh weight of new corm was obtained from 12 days and 80% CPE. By applying 12 days and 120% level, the highest values of plant height, number of leaves per plant and weight of fresh and dry vegetative growth were recorded. Whereas, 3 days and 120% level gave the highest leaf area. Moreover, watering each 9 days and 80% CPE is the effective irrigation scheduling on flowering parameters. Meanwhile, 12 days and 60% is the proper irrigation scheduling for highest total chlorophyll content.
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灌溉调度及其对温室栽培小苍兰水分生产力、营养和开花参数的影响
于2017/18和2018/19年度在北尼罗河三角洲萨哈园艺研究站进行了温室盆栽试验,研究了不同灌溉时间对小苍兰水生产力、产量、营养、开花、球茎参数和叶绿素含量的影响。因此,试验采用灌水量为100(对照)、120、80和60%的4种灌水量,灌溉间隔为3、6、9和12 d。结果表明,灌溉调度对上述指标有显著影响。穗鲜重经济产量最高的季节平均灌溉水量为12.58 cm, 9天以内新穗鲜重经济产量为14.05 cm, 12天和80%经济产量平均灌溉水量分别为13.32cm。在灌溉水生产力(IWP)方面,该灌溉计划的穗部IWP最高,为0.7g.cm-1,新球茎IWP最高,为0.43 g.cm-1。小苍兰穗鲜重和新球果可售产量,穗鲜重在第9天达到最大值,为60%;新球果鲜重在第12天达到最大值,为80%。施用12 d,以120%水平处理,记录了单株株高、单株叶数和鲜、干营养生长质量的最高值。而3 d和120%水平的叶面积最高。每9 d灌水和80% CPE是影响开花参数的有效灌溉调度。总叶绿素含量最高的灌溉时间为12 d、60%。
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