Ullah Hafiz, Gul Bakhtiar, Khan Haroon, Zeb Umar
Department of Botany, University of Chitral, KP, Pakistan.
Department of Weed Science, Faculty of Crop Protection Sciences, The University of Agriculture Peshawar, Pakistan.
Heliyon. 2021 Jun 24;7(6):e07399. doi: 10.1016/j.heliyon.2021.e07399. eCollection 2021 Jun.
The shortage of conventional feedstuff is one of the rising issues faced by the developing countries of the world. To bridge the gap between supply and demand of the major feedstuff it is desirable to practice the use of non-conventional feed resources. Duckweeds are the aquatic macrophytes growing in stagnant water bodies that offer a choice to be used as an alternate feed. Before the use of any alternate feed, it is vital to know the nutritional composition of the feed under diverse environmental conditions. The objective of this study was to investigate the influence of salinity, abiotic stress, on the proximate composition of duckweed ( L.). The experiment was laid out in Completely Randomized Design (CRD) with 3 repeats. Data was collected on protein, lipid, carbohydrate, and mineral contents. In the laboratory trial plants were grown under the saline condition of different concentrations ranging from 2 g NaCl L to 12 g NaCl L for a growing period of 20 days. The biomasses obtained were tested for proximate composition. ANOVA of the result exhibited a significant effect of salinity on the proximate composition of the plant. Protein residues of the plant started declining above the concentration of 4 g NaCl L until the lowest value was obtained at 12 g NaCl L. Lipid composition showed more sensitivity to the stress with a sharp decline above 2 g NaCl L having a minimum value at 12 g NaCl L. Carbohydrate contents increased with increasing salinity up to 6 g NaCl L above which a decrease was observed. The highest accumulation of the macronutrients i.e., Ca, Mg, took place in the lower range of concentration of the salt. The percentage compositions of micronutrients such as Fe, Mn, and Zn percentage were reduced at a higher range of salinity while the optimum level was recorded in plants treated with 2 g NaCl L, followed by control. The total accumulation of both macro and micronutrients was higher in the plant material treated with a lower level of salt concentration, concluding a significant effect of salinity on proximate composition. As for the Indus water salinity level, the plant has the capacity of tolerance and can be grown without affecting its proximate composition.
传统饲料原料短缺是世界上发展中国家面临的日益严峻的问题之一。为了弥合主要饲料原料的供需差距，采用非常规饲料资源是可取的。浮萍是生长在静止水体中的水生大型植物，可作为替代饲料。在使用任何替代饲料之前，了解不同环境条件下饲料的营养成分至关重要。本研究的目的是调查盐度（非生物胁迫）对浮萍（L.）近似成分的影响。试验采用完全随机设计（CRD），重复3次。收集了蛋白质、脂质、碳水化合物和矿物质含量的数据。在实验室试验中，植物在2 g NaCl/L至12 g NaCl/L的不同浓度盐胁迫条件下生长20天。对获得的生物量进行近似成分检测。结果的方差分析表明盐度对植物的近似成分有显著影响。当NaCl浓度高于4 g/L时，植物的蛋白质残留量开始下降，直至在12 g NaCl/L时达到最低值。脂质成分对胁迫更为敏感，在2 g NaCl/L以上急剧下降，在12 g NaCl/L时达到最小值。碳水化合物含量随着盐度的增加而增加，直至6 g NaCl/L，高于此浓度则下降。大量营养素（即钙、镁）的最高积累发生在较低的盐浓度范围内。在较高盐度范围内，铁、锰和锌等微量营养素的百分比组成降低，而在2 g NaCl/L处理的植物中记录到最佳水平，其次是对照。较低盐浓度处理的植物材料中大量和微量营养素的总积累量更高，这表明盐度对近似成分有显著影响。就印度河水盐度水平而言，该植物具有耐受能力，生长时不会影响其近似成分。
