Effects of Foliar and Soil-Applied Liquid Organic Fertilizers on the Growth of <em>Basella alba</em> L. and <em>Centella asiatica</em> L.

Abstract

Purpose: Environmental-friendly organic fertilizers reduce the adverse impacts of chemical fertilizers. This study was conducted to formulate organic liquid fertilizers using selected plant materials i.e., Tithonia diversifolia, Mikania scandens, Chromolaena odorata and Gliricidia sepium with selected organic wastes to compare the efficacies of foliar and soil-applications over the growth of leafy vegetables; Basella alba and Centella asiatica.Research Method: Selected plant materials were allowed to decompose for two months and thereafter fish waste was hydrolyzed separately with fruit wastes of Carica papaya, Ananas comosus and (1:1 w/w) mixture of both were mixed and nutrients analyzed. Fertilizers were foliar and soil-applied separately on C. asiatica and B. alba in RCBD in pot trials.Findings: Fertilizer formulated with decomposed plants + fish waste hydrolyzed with C. papaya significantly recorded the highest N (0.57%), P (0.06%) and highest growth of C. asiatica and B. alba over both soil and foliar applications followed by the fertilizer formulated with decomposed plants + fish waste hydrolyzed with C. papaya + A. comosus. Foliar-application of B. alba significantly showed the highest growth than the soil-application [shoot height (36.6±3.4 cm vs 30.0±1.5 cm), number of leaves per plant (21.7±1.4 vs 17.5±0.8) and plant fresh-weight (61.5±1.8 vs 55.6±0.9 g)] whereas, C. asiatica indicated no significant difference considering both fertilizer application methods. Research limitation:Pot experiments were carried out to provide uniform soil conditions for the experiment which was the main limitation compared to field trials. Originality/value:The formulated novel fertilizers could be utilized effectively in organic farming for safe and healthy leafy vegetables which reduce the adverse impacts of chemical fertilizers.

Respon Pertumbuhan dan Hasil Jagung Manis (Zea mays Saccharata Sturt L.) terhadap Pupuk Organik Cair Asal Limbah Buahan dan NPK di Lahan Kering

“…Penggunaan POC asal limbah buah dalam bentuk cair dapat meningkatkan ketersediaan N total yang tinggi (Wang et al, 2019;Wisuthiphaet et al, 2015). Nitrogen total yang tinggi disebabkan meningkatnya aktivitas mikroorganisme yang diberi melalui POC asal limbah buah (Enujeke & Ojeifo, 2013;Ranasinghe et al, 2021). Ketersediaan nitrogen yang tinggi akan meningkatkan kandungan klorofil dalam daun sehingga terjadi proses fotosintesis yang sangat signifikan serta akumulasi karbohidrat di daun meningkat.…”

Pemanfaatan Limbah Pabrik Tahu Dan Air Cucian Beras Sebagai Pupuk Organik Cair Terhadap Pertumbuhan Dan Hasil Tanaman Terung Ungu (Solanum melongena L)

“…Hasil metabolisme inilah akan tercermin dalam pertumbuhan dan hasil tanaman (Rakhmayani et al, 2021). Selain itu juga kandungannya setelah terurai menghasilkan unsur-unsur P, K, Ca, Fe, Cu, C, H, O, S yang mempunyai peran penting dan mempengaruhi proses metabolisme dalam pertumbuhan generatif tanaman (Ranasinghe et al, 2021). Dari segi fisiologis tanaman tidak mampu memenuhi kebutuhan haranya agar semua buah menjadi besar dan siap panen, selama kondisi tanaman sehat dan unsur-unsur yang menunjang perkembangannya terpenuhi (Nasmia et al, 2021).…”

Analysis of the heavy metals and Escherichia coli contamination of liquid organic fertilizers in the local market, Sri Lanka

“…The rising demand for organic fertilizers, organic farming, and organic foods is globally driven by a growing public emphasis on food safety and security. Concerns such as soil degradation, declining fertility, organic matter loss, elevated soil acidity, diminished biodiversity, groundwater contamination, (Ranaweera et al 2010;Herath 2014) and health issues like chronic kidney disease and methemoglobinemia (Jayasumana et al 2015) can be mitigated through the adoption of organic agricultural practices (Ranasinghe et al 2021). Even though farmers often use organic fertilizers in plant production to increase productivity they can also be a potential source of environmental pollution (Hai et al 2017), there is increasing evidence that organic fertilizers can have high concentrations of trace metals such as Cr, Ni, Cu, Zn, As, Cd, and Pb.…”