el-Khaimah, Qalyubiah Governorate. The aim of the current investigation was to study the impact of three planting dates (18-Dec, 7-Jan and 27-Jan), three irrigation levels at 60, 80 and 100% of irrigation water requirements (IR) and their interaction on potato crop productivity. 9 treatments were obtained by combination of different planting dates and irrigation levels.Planting dates were arranged as the main plots, while, irrigation levels were arranged in the sub plots, The obtained results indicated that the highest tuber yield was obtained by the first planting date (18 Dec.) during both studied seasons, While, The highest plant growth parameters and tuber yield per plant were obtained by 100% followed by 80% irrigation level during both seasons. However, the interaction effectindicated that first planting date (18-Dec) combined with 100 % irrigation level gave the highest potato tuber productivity than the other treatments, whereas the interaction of first planting date 18-(Dec) combined with 80% irrigation level gave the best for water use efficiency compared to the other treatments during both tested seasons.
T HIS investigation was conducted under greenhouse conditions in the Abu Ghaleb area, Giza Governorate, Egypt, during two successful seasons of 2019 and 2020. The Rosalina F 1 tomato hybrid was used in this study to produce organic tomatoes. There were five treatments, chicken manure, plant compost, animal compost, chemical fertilizer and humic acid. The highest values of fruit weight were found with treatment of chicken manure, 83.6 and 78.3g, in seasons 2019 and 2020, respectively. While the plant compost treatment recorded the highest values of plant height, 120 and 118 cm, in seasons 2019 and 2020, respectively. The lowest values of unmarketable crop in 2019 was 83.30g/plant with plant compost treatment and 88.33g/plant in 2020 was with chicken manure treatment, while the highest values of unmarketable crop were found when treated with animal compost, 136 and 125g/plant, in seasons 2019 and 2020, respectively. With respect to N and Ca percentage, the highest concentrations were recorded with plant compost treatment, 0.52, 2.98% and 2.95 2.89% in 2019 and 2020, respectively. Regarding K%, the highest concentration was recorded with animal compost treatment, 4.2 and 4.66% in 2019 and 2020, respectively. The trait of firmness firmness recorded highly significant values were recorded with chicken manure treatment, 0.36 lb/inch 2 in both seasons. It was found that total plant yield and marketable crop weight per plant recorded the highest values with chicken manure, 1736 and 1646g/plant (unmarketable crop weight per plant 90g) in season 2019, and 1628 and 1540g/plant (unmarketable crop weight per plant 88.3g) in season 2020, respectively. In most cases, no significant differences were realized between chicken manure and plant compost treatments. The lowest significant values of all measured parameters were achieved when tomato plants received chemical fertilizer or humic acid treatments.
T O examine the responses of three vegetable plants to cadmium and salinity stresses, this study was conducted in a greenhouse over two successive years, 2019 and 2020. The chosen plants are radish (Raphanus sativus), rocket (Eruca sativa) and turnip (Brassica rapifera.). The treated plants were exposed separately to cadmium levels of 5, 25 and 50 ppm, and salinity levels of 1000, 1500 and 3000 ppm, through irrigation, in addition to the control treatments (0 ppm Cd or salinity).Cadmium stress on the three vegetable plants caused clear reduction in plant height, root length, biomass, chlorophyll pigments and overall growth parameters over time. Radish, rocket and turnip plants were found to accumulate Cd in their leaves when exposed to different Cd concentrations. Accumulated Cd was increased in leaves tissue with the increase of Cd concentration level. A general decrease in chlorophyll, with the increase of Cd concentration was also detected. The growth of radish, rocket and turnip plants exposed to salinity has been affected and main reductions in plant height and root length with salinity level were observed on the last growth stage (120 days). The results indicated that cadmium treatments had a greatest impact than salinity treatment. Moreover, percentage levels of nitrogen, phosphorus and potassium in leaves of treated different plant species have been affected by cadmium and salinity treatments. In conclusion, radish, rocket and turnip exposed cultivars showed variation in response to these stresses and confirms that species and genotypes crops are differ in their sensitivities to abiotic stresses.
Genetic diversity of 10 potato cultivars was investigated at the DNA level with the random amplified polymorphic DNA (RAPD) procedure and at the phenotypic level using morphological characters. The results indicated that there were considerable variations among the different studied cultivars. Cultivars Victoria, Frizia and Safaren had the highest chlorophyll content compared to the other cultivars in both seasons. The largest leaf area and leaf dry weight were measured in cultivar Safaren and Mondial in both seasons. Cultivars Aboulx and Mondia produced the highest tuber yield in both seasons. On the other hand, cultivars Victoria and Edward were characterized by their considerably lower yield than other studied cultivars. Specific gravity varied considerably among the different potato cultivars. Thirteen random decamer primers were used to amplify DNA via the polymerase chain reaction and 75 RAPDs were generated. The RAPD profiles obtained were successfully used to differentiate potato cultivars. Based on the pair-wise comparison of amplification products, genetic similarity was estimated. The genetic similarity among all potato cultivars ranged from 50 to 92 %. Cultivars Victoria and Etfadoal presented the least similarity (0.50) while cultivars Mondial and Citrix had the greatest similarity (0.92). Etfadoal cultivar displayed the greatest genetic diversity of all cultivars. A dendrogram was constructed using UPGMA analysis. On the basis of this analysis, the cultivars were grouped into three clusters. The polymorphism detected suggests that RAPD markers are reliable for identification of potato cultivars and could be exploited in genetic mapping of populations to tag economically important traits.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.