📄 Growing Medium Type Affects Organic Fertilizer Mineralization and CNPS Microbial Enzyme Activities

Profile picture for user Elsewhere
Submitted by Elsewhere on 2020-Dec-14 Mon 05:00
2483
500Foods shared this story from Agronomy.

Agronomy, Vol. 10, Pages 1955: Growing Medium Type Affects Organic Fertilizer Mineralization and CNPS Microbial Enzyme Activities

Agronomy doi: 10.3390/agronomy10121955

Authors: Louise Paillat Patrice Cannavo Fabrice Barraud Lydie Huché-Thélier René Guénon

Managing plant fertilization is a major concern of greenhouse growers to achieve sustainable production with growing media. Organic fertilization is popular but is more difficult to control, since organic compounds need first to be mineralized by microbes. After 7, 14, 28, and 56 days of incubation, we investigated the response of microbial activities and nutrient releases from three frequently used organic fertilizers (horn and two plant-based fertilizers) in three frequently employed growing media (GM) types (peat, coir, and bark). We measured pH, electrical conductivity, nutrient contents (NH4+-N, NO3−-N, PO43−-P, SO42−-S), and enzyme activities (β-1.4-glucosidase, urease, acid phosphatase, arylsulfatase). After fertilization, microbes in coir expressed all the C, N, P, and S functions studied, making related nutrients available. In peat and bark, some C, N, P, and S-related pathways were locked. Peat presented high NH4+-N and PO43−-P releases linked to high acid phosphatase and β-glucosidase activities, while bark showed high nitrification rates but weak enzyme activities. Fertilizer types modulated these responses with lower activities and nutrient releases with horn. Our results contributed to better understanding mineralization processes in GM, showing different microbial responses to fertilization. This study pointed out the necessity to look deeper into microbial functions in GM optimizing biological and physicochemical properties.

Related News From Elsewhere

Growing Media
6 months
Fertilizers
5 months
Water Use
6 months
Growing Media
6 months
Shelf-Life
6 months
Organic
6 months
Biochar
6 months
Growing Media
6 months
Research Paper
7 months
Growing Media
8 months
Research Paper
8 months
Research Paper
8 months
Organic
9 months
Tomato
4 months
Food Safety
4 months
Organic
4 months
Nutrients
4 months
Robots
4 months
Genetics
4 months
Lighting
4 months