Moringa leaf extract as a bio-stimulant on growth, yield and nutritional improvement in cabbage

Abstract

Moringa is a valuable plant whose leaves are enriched with antioxidants, amino acids, vitamins and mineral nutrients and can be used as a bio-stimulant. A field work was conducted at the Soil Science Field Laboratory of Bangladesh Agricultural University (BAU), Mymensingh, during rabi season from November 2017 to February 2018 in order to investigate the effect of moringa leaf extract (MLE) on growth, yield and nutrient status of cabbage. The experiment was laid out in a randomized complete block design with four treatments and three replications. The treatments were T1 (control), T2 (MLE) sprayed at 2 weeks after transplanting only], T3 (MLE sprayed at 2 weeks and 4 weeks after transplanting), T4(MLE sprayed at 2 weeks after transplanting and after every two weeks thereafter). The rate of MLE application was 25 mL plant-1. All the treatments received recommended dose of N, P, K, S, Zn and B fertilizers. The application of MLE significantly improved the growth parameters, yield and yield contributing characters as well as nutrient content and uptake of cabbage. Among the parameters plant height (33.40 cm), leaf number (19.33 cm), length of the largest leaf (29.00 cm), head thickness (9.67 cm), head diameter (20.33 cm), gross yield (72.83 t ha-1) and marketable yield (48.87 t ha-1), were maximum in T4 where MLE was sprayed at 2 weeks after transplanting and after every two weeks thereafter. The lowest values of all these parameters were found in T1 where no MLE was sprayed. Foliar application of MLE also improved the concentration and uptake of macronutrients (N, P, K and S) in head of cabbage. Thus, application of MLE as a bio-stimulant has the potentiality to enhance growth, yield and nutritional quality of cabbage.
 Asian J. Med. Biol. Res. June 2020, 6(2): 196-203

Foliar application of moringa leaf extract as a bio-stimulant on growth, yield and nutritional quality of brinjal

“…The highest dry weight of root (29.00 g) was recorded in T 4 treatment which was statistically similar with T 3 and the lowest dry root weight was obtained from control (17.39 g). These results are in agreement with the findings of Muhamman et al (2013), Ozobia, (2014, Rady et al (2015), Rana et al (2019), Yusuff and Abiola, (2019) and Hoque et al (2020) who reported increased plant height, fresh weight and dry weight of shoot and better crop growth rate in different vegetable crops including tomato, eggplant, common bean, cauliflower, cucumber and cabbage respectively with foliar application of MLE compared to control. T 1 =Control (foliar spray with water), T 2 = MLE sprayed at 2 weeks after transplanting, T 3 =MLE sprayed at 2 weeks and 4 weeks after transplanting, T 4 =MLE sprayed at 2 weeks after transplanting and after every two weeks thereafter…”

“…The results of our study were accorded to those of several comparable studies of some researchers (Sivakumar and Ponnusami, 2011;Abdalla and EI-Khoshiban, 2012) suggesting that the increased uptake and accumulation of some macronutrient elements such as N, P, K and S in several plants under investigation as a consequence of application of moringa leaf extract. Hoque et al (2020) also found increased N, P, K and S contents in cabbage head due to application of MLE. Merwad (2017) found the highest percent increase of N, P, and K accumulation in pea for shoot and for seed with foliar application of 4% MLE.…”

“…Several comparable studies confirmed the current data. The increased uptake and accumulation of N, P, K and S in several plants were found as a consequence of foliar application of MLE (Merwad and Abdel-Fattah, 2017;Hala and Nabila, 2017;Jhilik et al, 2018;Hoque et al, 2020). As the leaves of moringa plant have been reported to be a rich source of important nutrient elements (Yameogo et al, 2011and Moyo et al, 2011, MLE improves uptake of beneficial elements and increases the nutrient status of plants.…”

Application of moringa leaf extract improves growth and yield of Tomato (Solanum lycopersicum) and Indian Spinach (Basella alba)

“…Modern agricultural production aims to provide sustainable management practices that are eco-friendly and low cost. In recent years, the natural plant growth enhancer is the main focus of study for many researchers around the globe (1). Moringa (Moringa oleifera L.) leaves are used as green manure and as a potential natural growth stimulant (2).…”

Phenotypic Plasticity for Growth and Nutrient Uptake in Milk Thistle under Salt Stress: Modulatory Role of Soil Supplementations with Plant Growth Promoters

“…The leaf extract of moringa leaves (MLE) was used as bio-stimulant of growth. The exogenous application of MLE efficiently increased the uptake of different macronutrients (N, P, K, and S) and increased plant growth and development (Hoque et al 2020) and mitigates salt-induced adversities (Merwad 2018).…”