scholarly journals RESPONSE OF SWEET PEPPER PLANTS (VEGETATIVE GROWTH AND LEAF CHEMICAL CONSTITUENTS) TO ORGANIC, BIOFERTILIZERS AND SOME FOLIAR APPLICATION TREATMENTS.

2012 ◽  
Vol 3 (9) ◽  
pp. 2465-2478
Author(s):  
K. Dawa ◽  
H. Abd El - Nabi ◽  
W. Swelam
10.5219/1131 ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 553-561
Author(s):  
Rabab Maraei ◽  
Noha Eliwa ◽  
Amina Aly

The experiment was conducted during two successive seasons 2016 and 2017 on sweet pepper plants to study the effect of foliar application of some natural extracts (fulvic acid at 2, 4 and 6% or algae at 1, 2 and 4 g.L-1) were applied three times along each season (after 2, 4 and 6 weeks of planting). The influence was evaluated through the response of vegetative growth, and some physical and chemical characteristics of sweet pepper fruits. The results obtained showed that the algae extract at 1 g.L-1 in most cases was better than the other spray treatments investigated to improve most fruit characteristics (length, diameter and yield of fruits), vegetative growth, and chemical properties followed by 6% fulvic acid. With regard to organic acids, malic and citric acids are the main organic acids found in sweet pepper. Malic, succinic and glutaric acids were higher in 1 g.L-1 algae extract treatment, but the concentration of citric acid was higher in 6% fulvic acid treatment. Therefore, algae extract and fulvic acid could be safely recommended as a natural biostimulants application for improving most desirable characteristics of sweet pepper grown under the same experimental condition.


Plants ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 733 ◽  
Author(s):  
Khaled A. A. Abdelaal ◽  
Yasser S.A. Mazrou ◽  
Yaser M. Hafez

Silicon is one of the most significant elements in plants under abiotic stress, so we investigated the role of silicon in alleviation of the detrimental effects of salinity at two concentrations (1500 and 3000 ppm sodium chloride) in sweet pepper plants in two seasons (2018 and 2019). Our results indicated that relative water content, concentrations of chlorophyll a and b, nitrogen, phosphorus and potassium contents, number of fruits plant−1, fruit fresh weight plant−1 (g) and fruit yield (ton hectare−1) significantly decreased in salt-stressed sweet pepper plants as compared to control plants. In addition, electrolyte leakage, proline, lipid peroxidation, superoxide (O2−) and hydrogen peroxide (H2O2) levels, soluble sugars, sucrose, and starch content as well as sodium content significantly increased under salinity conditions. Conversely, foliar application of silicon led to improvements in concentrations of chlorophyll a and b and mineral nutrients, water status, and fruit yield of sweet pepper plants. Furthermore, lipid peroxidation, electrolyte leakage, levels of superoxide, and hydrogen peroxide were decreased with silicon treatments.


2021 ◽  
Vol 45 (1) ◽  
Author(s):  
Hanaa Ali Abd-Alrahman ◽  
Fatma Sayed Aboud

Abstract Background Sweet pepper is considered one of the most important vegetable crops cultivated for local consumption and exportation. Under greenhouse conditions, the effects of different rates of yeast and compost tea on vegetative growth, leaves mineral content, fruit yield and quality were studied for two consecutive years 2018/2019 and 2019/2020 under soilless conditions. Nine treatments of compost tea (CT) and or dry yeast (DY) were applied using control (sprayed with distilled water); CT (10L/fed.); CT (20 L/fed.); DY (3 g/L); DY (6 g/L); CT (10L/fed.) + DY (3 g/L); CT (20L/fed.) + DY (3 g/L); CT (10L/fed.) + DY (6 g/L) and CT (20L/fed.) + DY (6 g/L). Results Results showed that the mixture of compost tea and dry yeast at a rate of 20 L./fed. plus 6 g/L, respectively, had significantly increased vegetative growth, fruit physical quality (length, diameter and fresh weight), total yield, leaves mineral content (N, P and K) and fruit nutritional value content (calcium and vitamin C). The maximum return or profit comes from the CT (20 L/fed) + DY (6 g/L) followed by CT (20 L/fed) + DY (3 g/L.) Conclusion It is clear that all treatments enhanced the yield and the fruit physical parameters of the studied plants as well as all treatments are economically feasible including the control treatment. However, looking at the Revenue/Cost ratio (R/C), one can find that the maximum net revenue comes from the mixture of CT (20 L/fed) plus DY (6 g/L) with a net revenue about 192.72 L.E./m2 and R/C ratio of 1.90, followed by CT (20 L/fed) + DY (3 g/L.).


Plants ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 1927
Author(s):  
Mostafa H. M. Mohamed ◽  
Rokayya Sami ◽  
Amina A. M. Al-Mushhin ◽  
Maha Mohamed Elsayed Ali ◽  
Heba S. El-Desouky ◽  
...  

Sweet pepperincludes several vitamins and is regarded as a great source of bioactive nutrients, such as carotenoids and phenolic compounds, for human growth and activities. This work aimed to investigate the effects of the soil addition of growth stimulants, namely, effective microorganisms (EM), compost tea, fulvic acid, and yeast extract, and foliar applications of seaweed extract, on the vegetative growth, enzyme activity, phytohormones content, chemical constituents of plant foliage, fruit yield, and fruit quality of sweet pepper plants (Capsicum annuum L. cv. Zidenka) growing under greenhouse conditions. The results showed that the tallest plant, largest leaf area/plant, and heaviest plant fresh and dry weights were recorded after combining a soil addition of yeast extract and foliar spray with seaweed extracts at 3 g/L in two growing seasons. The highest number of fruit/plant, fruit yield/m2, fruit values of vitamin C (VC), total sugars, total soluble solids (TSS), and carotenoids, along with the highest leaf of cytokines, P, K, Fe, and total carbohydrates values, were obtained using a soil addition of fulvic acid and spray with seaweed extract at 3 g/L in the two seasons of study. These treatments also provided the lowest abscisic acid, peroxidase, and super oxidase dismutase values in the same conditions. Sweet pepper plants supplemented with compost tea and seaweed extract foliar spray at 3 g/L were the most promising for inducing the highest values of fruit fresh and dry weights, fruit length and diameter, and the leavesrichest in N, Zn, and Mn; inversely, it induced the lowest catalase levels in both seasons. The applications of EM, yeast extract, and seaweed extract could be applied for high growth, mineral levels, enzymatic activity, fruit yield, and nutritional value of sweet pepper fruit and minimizing environmental pollution.


2017 ◽  
Vol 5 (4) ◽  
pp. 23
Author(s):  
Sahar S. Taha, Abdel Wahab M. Mahmoud, Mostafa M. Rad

Capsicum annum is one of the most cultivated summer crops in Egypt which is consider the most susceptible crop to harsh a biotic stresses as Salinity condition. Pots experiment was carried out at Faculty of Agriculture, Fayoum University, Egypt during two successive summer seasons of 2014 and 2015 to study the responsive of Sweet pepper (cv. California wonder) plants irrigated by diluted sea water (EC= 8.0 dSm-1) to foliar applications of 1 mM alpha-Tocopherol (α TOC). Four treatments were arranged in a randomized block design:1) plants irrigated by sea water (SW) and sprayed by tap water (TW), 2) TW for irrigation and α TOC for foliar spray, 3) SW for irrigation and α TOC for foliar spray and 4) the control (TW for irrigation and foliar spray). Pepper plants irrigated by sea water recognized significant reductions in growth parameters (leave number, leaf area, plant dry weight, Fruit number and Fruit yield). Results also showed that, foliar application of pepper plant with αTOC caused a notable upgrading in growth and yield under saline conditions. The maximum increased growth was obtained when plants irrigated by TW and sprayed by 1 mM αTOC. The foliar application of αTOC considerably boosted the activities of Superoxide dismutase (SOD), Catalase (CAT), Ascorbate peroxidase (APX) and Glutathione reductase (GR) of pepper plants contrasted to control treatment. The outcome of present experiment could be recommended for both new reclaimed lands suffering from salt water and regions exposure to salinity hazard in irrigated water.


2018 ◽  
Vol 25 (4) ◽  
pp. 394-399
Author(s):  
Mohammed Ali Abood ◽  
Aziz Mahdi Abd Al-Shammari ◽  
Ghassan Jaafar Hamdi

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