Time-dependent release of some plant nutrients from different organic amendments in a laboratory study

Abstract

Purpose Soil fertility management requires a precise assessment of nutrient release from organic amendments to decide the rates and frequency of application. Methods Time-dependent release of some macro-and micro-nutrients from farmyard manure, mushroom compost, poultry manure, vermi-compost, biogas slurry and biochar of Lantana sp. was studied during 120 days incubation through entrapment of released nutrients on ion exchange resins. Results Highest total concentration of K, Ca, Mg and S was in farmyard manure, Fe and Mn in mushroom compost, P, Zn and Cu in biogas slurry and B in biochar. Farmyard manure had the highest C:N ratio (34.2), while other organic amendment had C:N ratio < 20. The highest release of P, Ca, Mg, Zn and Cu was recorded from biogas slurry, of K and S from farmyard manure, of B from poultry manure and of Fe and Mn from mushroom compost. Mean percentage of total nutrient released was 30.5% P, 71.8% K, 23.1% Ca, 24.4% Mg, 29.3% S, 47.2% Zn, 22.9% Cu, 38.6% Fe, 46.6% Mn, and 70.9% B. Nutrient release from different organic amendments conformed to zero-order kinetics. The percent of total released nutrient, release kinetic constants and half-life of nutrients was related to the properties of organic amendments. Conclusions Based on the released amount of nutrients from different organic amendments, the best source seemed to be farmyard manure for S and K, mushroom compost for Fe and Mn, biogas slurry for P, Ca, Mg, Zn and Cu and poultry manure for B.

Kinetics of water‐extractable zinc release from seaweed (Fucus serratus) as soil amendment

“…Both studies attributed the slower release to desorption of Zn from inside macro‐ or micro‐aggregates, while Sadusky et al () described zero order nutrient release as a surface‐controlled process attributable to the weathered nature of soils. In a laboratory study to investigate time‐dependent release of Zn from biochar over the course of 120 d, Dey et al () observed a Zn accumulation throughout the period, which, although formally statistically non‐significant, conformed to zero order release kinetics. Hence, our observation of zero order kinetics in stage 2 indicates the release of zinc from the recalcitrant soil reservoir.…”

“…Recent research has investigated the potential of organic amendments as Zn fertilizers. Suitable potential sources include: sewage sludge ( Motaghian and Hosseinpur , ), green manures made from red clover and sunflower ( Aghili et al, ), poultry manure ( Ravindran et al, ), cow manure and vermicompost ( Motaghian and Hosseinpur , ), biogas slurry ( Malav et al, ; Dey et al, ), brewery waste sludge ( Ahmed et al, ), and seaweed ( Possinger , ).…”

“…Eghball et al (2002) reported that, in order to apply manure or compost to fulfil the nutrient requirements of a crop, knowledge of the amount of nutrients mineralized following application is needed as this should be considered when determining application rates. Hence, Dey et al (2019) engaged kinetic studies to assess nutrient release from different organic amendments so as to decide the rates and frequency of application. Kinetic studies of nutrient release from organic amendments are now gaining attention, while investigation of zinc release kinetics from organic fertilizer-amended soils is very limited.…”

Non-herbicidal Weed and Organic Nutrient Management in Maize under Rainfed Maize-Sesamum Cropping Sequence

“…Manures have manifold benefits on the soil physical, chemical and biological characters 28 and have the ability to supply plant nutrient for two or more crop seasons. 29 Therefore, growth characteristics and seed yield of sesamum showed significant improvement due to residual effect of application of enriched compost @ 2.5 and 5.0 t/ha compared to non application of enriched compost.…”

Release of Micronutrients from Different Substrates of Organic Matter to the Soil

“…Evidently addition of various substrates of organic matter resulted in building up of DTPA-extractable micronutrients and HWS-B. all extractable micronutrients compared to soil with mineral fertilization which in turn, could influence the availability of micronutrients to plants (Dey et al, 2019). Farmers in the north-east have been applying various organic manures since time immemorial (Basumatary et al, 2000).…”