Governorate, Egypt, to study the effect of vermicompost, botanical compost and mineral nitrogen fertilizers on growth, productivity and bulb quality of garlic.The treatments were arranged in a randomized complete block design with three replicates. Results showed that fertilizing garlic plants with 3 ton/feddan of vermicompost+20 m 3 /feddan of botanical compost+100% of recommended mineral nitrogen increased plant height, leaf number, neck and bulb diameters, bulbing ratio, bulb weight, number of cloves/bulb, dry weight of bulb and leaves, total dry weight/plant and total yield/feddan. Also, this treatment led also to an increment of N, P and K contents in leaves, bulb and plant, total protein and dry matter contents, while the lowest value of nitrate content in cloves was obtained by using vermicompost at 3 ton/feddan+ botanical compost at 20 m 3 /feddan in both seasons of the study.
This experiment was carried out during the two successive winter seasons of 2018/2019 and 2019/2020 at El-Khattara Experimental Farm, Fac. Agric., Zagazig University, Sharkia Governorate, Egypt to study the effect of mineral nitrogen levels and foliar spray with tryptophan amino acid in different concentrations on the growth, yield and quality of lettuce plants cv. Dark green under sandy soil conditions. The best interaction treatment for increasing head weight, total yield and leaf area index was fertilizing plants with mineral nitrogen at 75% of recommended dose (RD) and spraying with tryptophan at 30 ppm. Moreover, fertilizing with 75% N (RD) and spraying with tryptophan at 45 ppm gave the highest values of total dry weight/ plant, N, K and dry matter percentage. In addition, fertilizing lettuce plants with 100% N (RD) and spraying with tryptophan at 30 (ppm) increased P%, whereas the highest nitrate concentration in leaves recorded by the interaction treatment with 100% N (RD) and all tested concentrations of tryptophan. Therefore, fertilizing with 75 % N (RD) and spraying with tryptophan at 30 ppm could be recommended for raising lettuce yield and giving moderate value of nitrate concentration in leaves under conditions of this study.
A field experiment was carried out during two summer seasons of 2017and 2018 at Private Farm, at El-Salhyia District, Sharkia Governorate, Egypt, to study the effect of compost tea and some nutrient supplements on growth and yield of some potato cultivars (Bavana and Eliance) grown in loamy sand soil conditions. The results showed that, Bavana cultivar gave higher number of main stems/plant, shoots dry weight/plant and total chlorophyll in leaf tissues, whereas Eliance cultivar gave higher values of plant height, number of tubers/plant, average tuber weight, tuber yield/plant and total yield/ fed. and spraying potato plants with compost tea supplemented with NH4NO3( 0.5g/l) + molasses (0.5% v/v) led to increased number of leaves/plant, shoots dry weight, number of tubers/plant, average tuber weight, tuber yield/plant and total yield/ fed. In addition, spraying Bavana cultivar with compost tea supplemented with NH4NO3 + molasses or molasses or NH4NO3 gave the maximum values of number of main stems/plant, total chlorophyll, total carbohydrates and starch with no significant differences between them. On the other hand, spraying Eliance cultivar with compost tea supplemented with NH4NO3+molasses increased significantly plant height. Moreover, the interaction treatments between Bavana or Eliance plants and spraying compost tea supplemented with NH4NO3+ molasses or with molasses had significant effect on average tuber weight, tuber yield/plant, total yield/fed., DM% and P%. In addition, spraying Eliance cultivar with compost tea supplemented with NH4NO3 increased P and K contents in tubers, while, N and total protein in tubers were significantly enhanced due to spraying Bavana cultivar with compost tea supplemented with NH4NO3.
The response of cowpea cv. Cream 7 growth and productivity to potassium fertilization mixed with or without Nano mixture of micronutrients were studied during the summer of 2017 and 2018 seasons at Experimental Farm, Faculty of Agriculture, Zagazig University, Egypt. The experiment aimed to assessed the effect of potassium fertilization levels (0.0, 24, 48 and 72 kg K2O/Fed), Nano mixture of micronutrients rate (0.0, 0.50, 1.0 and 2.0 g/l) and their interactions on growth, seed yield, macronutrients concentration in shoot and seeds and seed quality of cowpea plants. Source of potassium levels was potassium sulphate (48-52% K2O). The used Nano mixture of micronutrients called "Magrow NanoMix" and it contained Fe (6%), Zn (6%), B (2%), Mn (5%), Cu (1%) and Mo (0.1%). These treatments arranged in a split-plot design with three replicates. The results referred to that fertilizing cowpea plants with potassium at 72 kgK2O/Fed. significantly increased cowpea growth (plant height, branch and leaf numbers per plant as well as branch, leaf and total dry weights/plant), yield components(pod diameter and length, hundred seeds weight, pod number/plant and seed yield/ plant and /Fed.) as well as chemical constituents (N, P and K percentages in each leaves and seeds as well as total carbohydrates and protein percentages in seeds, also, total chlorophyll content (SPAD) in cowpea leaves compared with control and the lowest levels under study. The same trend was achieved by using the highest rate of Nano mixture of micronutrients (2g/l) regarding the increase in most of abovementioned parameters of growth, yield and chemical constituents of cowpea compared with unsprayed plants (control). In general, application of potassium fertilization at 72kg K2O/ Fed. as soil application with Nano- mixture of micronutrients at 2g/l rate as foliar spray was recorded the best treatments for increasing all cowpea growth and seed yield components as well as N, P, K and carbohydrates percentage in seeds such as compared with control treatment (without using mineral potassium or Nano mixture of micronutrients) in growing season.
This research was conducted in the Post-Harvest Laboratory of the Horticulture Department, Faculty of Agriculture, Zagazig University, Egypt, during two seasons of 2019 and 2020 to study the effect of dipping cherry tomatoes fruits in solutions of edible materials on fruits quality and storability during storage at 7±2°C and 90 ± 3% relative humidity for 28 days. Where the fruits were dipped in chitosan nano particles (ChNPs) solution at 0.5 and 1 %, Arabic gum solution at 5 and 10%, bottle gourd seed oil at 0.2 and 0.4 % and distilled water (control). The results showed that, fresh weight losses, fruit decay, total soluble solids (TSS) content, fruit red color value a*and fruit red color value a*/b* increased progressive as the storage duration was extended from zero to 28 days. On the other hand, increasing the cold storage time reduced the fruit firmness, titratable acidity, vitamin C content and fruit red color value b*. Dipping in solution of bottle gourd seed oil at 0.4% gave the highest fruit firmness, vitamin C and the lowest values of weight loss percentage, Also, dipping in bottle gourd seed oil solution at 0.2 and 0.4 % did not show any decayed fruits and gave the highest values of a*/b*ratio, in addition, it is increased TSS in fruits at 28 days of storage. In general, ChNPs solution at 1 and Arabic gum solution at 10% % gave the highest values of titratable acidity.
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