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Growth characteristics, chlorophyll content and nutrients uptake in Tetragonia decumbens Mill. cultivated under different fertigation regimes in hydroponics
Crop & Pasture Science ( IF 1.9 ) Pub Date : 2021-04-22 , DOI: 10.1071/cp20511
Milile Nkcukankcuka , Muhali O. Jimoh , Gerhardus Griesel , Charles P. Laubscher

This study was designed to investigate the growth characteristics, chlorophyll content and nutritional properties of Tetragonia decumbens, an indigenous plant species of the South African Western Cape. One hundred and eight cuttings generated from a mother plant obtained from a garden were cultivated in hydroponic systems over 7 weeks. The hydroponic experiment comprised three nutrient solutions of graded concentrations (0.2, 0.1, and 0.05% w/v) of Nutrifeed fertiliser prepared in the water whereas the control had no nutrients. Soilless treatments were made of 100% silica sand medium heaped in plastic pots near the brim. Each hydroponic system was run for 2 h/week at the pH and electrical conductivities (EC) of 4.5, 5.5, 6.5, and 3.38, 2.34, 1.10 dS/m respectively, whereas frequencies of irrigation were set at 2 L/h for 15 min at an intermittent break of 2 h between 0900 and 1700 hours. For the first time, this study reported macronutrients and micronutrients present in dune spinach. At P < 0.05, post-harvest results showed that fertigation did not affect the macronutrients, however, micronutrients were significantly affected. Therefore, a well-drained soilless media (100% silica) with a high nutrient application (0.2% w/v), low electrical conductivities, and moderate pH levels had better results in vegetative growth and nutritional composition compared with other treatments.



中文翻译:

斜纹铁杉的生长特性,叶绿素含量和养分吸收。在不同的施肥方式下进行水培栽培

这项研究旨在调查德古角Tetragonia decumbens的生长特性,叶绿素含量和营养特性。,是南非西开普省的本土植物。在水培系统中耕种了7个星期,将从花园中获得的母本植物产生的108个插条进行了栽培。水培试验包括在水中配制的三种浓度分别为(0.2、0.1和0.05%w / v)Nutrifeed肥料的营养液,而对照没有营养液。用堆积在边缘附近的塑料盆中的100%硅砂培养基进行无土处理。每个水培系统在pH和电导率(EC)分别为4.5、5.5、6.5和3.38、2.34、1.10 dS / m的条件下运行2小时/周,而灌溉频率设置为2 L / h持续15在0900到1700小时之间的2小时间歇性中断中,每分钟的间隔为1分钟。首次,这项研究报告了沙丘菠菜中存在的大量营养素和微量营养素。在P <0.05,收获后的结果表明施肥不影响大量营养素,但是微量营养素受到显着影响。因此,与其他处理相比,排水良好的无土培养基(100%二氧化硅)具有较高的养分施用量(0.2%w / v),低电导率和中等pH值,在营养生长和营养成分方面具有更好的结果。

更新日期:2021-04-26
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