Effects of vermicompost and PK on growth and protein content of spinach (Spinacia oleracia L.)

Abstract

Results of a pot experiment carried out on spinach with vermicompost (5, 10 and 15 ton/ha), phospho-rous (10, 20 and 30 kg/ha) and potassium (20, 30 and 40 kg/ha) fertilizers showed that plant height, leaf area, fresh and dry weight of plants increased significantly (p ≤ 0.5) over the control. Highest height (23.55 cm), leaf area (80.88 cm2/plant), fresh weight (3.838 g/plant) and dry weight (0.274 g/plant) were maximum in VC15P20K30, VC15P30K30, VC10P20K30 and VC10P10K40, respectively, while leaf number was almost same in all the plants. Highest protein content (24.61%) was obtained in the treatment VC15P10K20. Highest dry matter of leaf was obtained at VC10P10K40, but the highest protein content was at VC15P10K20 which might be due to dilution effect. Similar values of protein content were obtained in treatments VC5P20K30, VC5P20K40, VC5P30K20, VC15P10K40, VC15P20K30 and VC15P30K20. Maximum value of nitrogen, phosphorous (1.621%) and potassium (4.066%) were obtained in treatments VC5P20K20 and VC10 P30 K40, VC15 P10 K20, respectively.

Commercially available organic manures on growth, yield and nutrient content of Burmese Grapes (Baccaurea ramiflora)

“…Immediately after harvest, the fresh weight of leaf, stem, and root was recorded. Samples were air-dried at room temperature for three days and finally oven-dried at 65°C for 72 hours (Islam et al 2020). Dry weight was recorded, ground in a mechanical grinder, and stored in air-tight plastic bottles for chemical analysis.…”

“…The highest protein content was found in the leaf and the lowest was recorded in the root. Islam et al (2020) reported that the highest protein content in leaf (24.65%) was achieved in VC 15 ton/ha, P 10 kg/ha, K 20 kg/ha in Spinacia oleracea. Magomya et al (2014) collected ten different plants samples from the wild and farmland of Nigeria and found that protein range from 2.63 to 18.59%.…”

Effects of Organic Manures and Npk on Growth and Protein Content of Okra (Abelmoschus Esculentus L. Moench)

“…Hibiscus canabinus, Haematostaphis barteri, Sesamum indicum, Balanites aegyptiaca, Cassia tora, Celtisin tegrifolia, Anonas En galensiss, Ceiba pentandra, Ficus ingens and Solanum melongena the protein of which ranged from 2.63-18.59%. Islam et al (2020) reported that the highest protein content (24.61%) was obtained in spinach in the treatment VC 15 ton ha-1 P 10kgha-1 K 20kgha-1 .…”

Evaluación de biol, bocashi, composta y vermicomposta en las variables morfológicas del cultivo de espinaca (Spinacia oleracea L.) / Evaluation of digestate, bocashi, compost and vermicompost on the morphological variables in spinach crop (Spinacia oleracea L.)

“…Sin embargo, considerando los promedios, con el bocashi se obtuvo la mayor área foliar incluso superando a la fertilización química. Los valores medidos fueron incluso mayores a los reportados por Islam et al (2020), quienes llevaron a cabo un experimento fertilizando un cultivo de espinaca con vermicomposta (5, 10 y 15 ton / ha), fósforo (10, 20 y 30 kg / ha) y potasio (20, 30 y 40 kg / ha) y reportaron una área foliar máxima de 80,88 cm 2 / planta.…”

“…Este efecto benéfico de los fertilizantes orgánicos se ha reportado por otros autores, por ejemplo, Ievinsh (2011) indica que la vermicomposta contiene sustancias biológicamente activas producidas a través de la interacción entre los microorganismos y las lombrices, algunos de estos metabolitos son similares a las hormonas vegetales. Además, puede actuar como acondicionador del suelo y fertilizante orgánico, ya que mejora disponibilidad de nutrientes minerales, aumenta la aireación y mejora el ciclo de nutrientes y del agua (Islam et al, 2020). Estudios proporcionaron evidencia de que la composta afecta positivamente la calidad del suelo en términos de actividades biológicas y actividades deshidrogenasa, fosfatasa y glucosidasa especialmente, debido principalmente a una mayor disponibilidad de carbono (Bonanomi et al, 2014).…”