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Foliar Application of Moringa Leaf Extracts Affects Growth, Yield and Mineral Composition of Pepper (Capsicum Annuum L.) under Greenhouse Conditions

Mehdawe Arwa, Mahadeen Atif, Al-Ramamneh Ezz Al-Dein

Journal of Ecological Engineering

2023

Vol. 24, nr 6

329--337

The higher cost and increased pollution caused by the intensive use of fertilizers in growing vegetables necessitates the use of safer organic bio-stimulants to partially substitute fertilizers. Analyses of leaf extracts of Moringa oleifera and Moringa peregrina in the present study confirmed their rich content of diverse compounds and elements and indicated that except for Mg and Ca, M. oleifera outyielded M. peregrina for the measured elements and bio-constituents. Foliar spray of leaf extracts of M. oleifera and M. peregrina at (1:10, 1:20, 1:30 extract: distilled water) was attempted on pepper plants under greenhouse conditions every two weeks for five times starting 30 days after transplanting date. Enhanced vegetative growth parameters (plant height, number of branches and leaves, plant fresh and dry weights, leaf area, and leaf chlorophyll-content) and better yield attributes (Fruit yield·plant-1 and hectare-1) were obtained by foliar spraying of plants with the concentrated extract 1:10 of moringa species. The vegetative growth of pepper plants was significantly influenced by extract concentration, moringa type·concentration, but not for moringa type (P≤0.05). However, moringa type, extract concentration and their interactions significantly affected pepper fruit-yield·plant-1, pepper fruit-yield·ha-1 and mineral content of pepper leaves (P≤0.05). Irrespective of moringa type, the highest extract concentration 1:10 resulted in the highest yield ·plant-1 (1.68 kg) and yield·hectare-1 (16.88 ton) of peppers. The present study highlighted the potential of using extracts of moringa trees in organic farming.

Growth, Yield and Biochemical Responses in Barley to DAP and Chitosan Application Under Water Stress

Al-Tawaha Abdel Rahman M., Jahan Nusrat, Odat Nidal, Al-Ramamneh Ezz Al-Dein, Al-Tawaha Abdel Razzaq, Abu-Zaitoon Yousef M., Fandi Khalid, Alhawatema Mohammad, Amanullah, Rauf Abdur, Wedyan Mohammad, Shariati Mohammad Ali, Qaisi Ali M., Imran, Tawaha Khaled, Turk Munir, Khanum Samia

Journal of Ecological Engineering

2020

Vol. 21, nr 6

86--93

The present investigation was aimed at enhancing the quality and productivity of barley by the fertilizer and chitosan application. The field experiments were conducted in the northern region of Jordan, under the rain fed conditions in the main growing seasons of 2014/2015 and 2015/2016. The experiment was conducted in a well-designed split-plot having three replications and two fertilizer levels (0 and 100 kg•ha-1 DAP (Diammonium phosphate 46% P2O5). Chitosan, in three different concentrations (0, 5, and 10 g•L-1), was randomly applied to all fertilized plots as subplot treatments. The results revealed the highest seed dry weight (5.8 g per plant) in the plants treated with 100 kg•ha-1 of DAP, while the lowest (5.2 g per plant) was recorded in the control which exhibited an increase of about 10%. However, other parameters, namely the number of grains, number of spikes, and number of grains were also found to be influenced by the chitosan treatment. Significant variation (P < 0.01) were also high between the lines in the presence and absence of chitosan application. The highest number of grain yield, number of spikes, and grains/spike were found by the foliar treatment of 10 g•L-1 chitosan to barley plants at the tillering stage. Similarly, the grain quality, particularly with respect to protein and starch, was found to be enhanced significantly over control. The highest protein (12.6%) and starch (62.3%) were obtained with 100 kg•ha-1 DAP fertilizer level mixed with 10 g•L-1 chitosan. Hence, based on results, it can be concluded that the fertilizer level 100 kg•ha-1 DAP combined with 10 g•L-1 chitosan is economically best and recommendable for improving the quality and productivity of barley in the northern region of Jordan.