creators_name: Znaïdi, Akram
creators_name: Daami, Megda
creators_name: Ben Kheder, Mohamed
creators_name: Mahjoub, Mohamed
type: workpaper
datestamp: 2004-08-13
lastmod: 2009-08-20 14:23:31
metadata_visibility: show
title: Study and assessment of compost of different organic mixtures and effect of organic compost tea on plant diseases
ispublished: unpub
subjects: 3compost
full_text_status: public
abstract: Four compost treatments representing different organic mixtures were studied: 
- Treatment T1: 100% cattle manure 
- Treatment T2: 80% cattle manure and 20% sheep manure 
- Treatment T3: 70% cattle manure, 20% sheep manure and 10% poultry 
manure. 
- Treatment T4: 50% cattle manure, 20% sheep manure, 20% poultry manure 
and 10% crushed wheat straw. 
The results showed that the temperature was higher for the 4th treatment which 
was richer in carbon than the other treatments. 
The initial alkaline pH decreases for all treatments and approaches neutrality 
at the end of composting process, essentially for the first treatment. There is also a 
decrease in the carbon / nitrogen ratio. 
At the maturity stage, a compost tea was prepared from different composts 
after five days extraction period. The four compost teas were tested on different plant 
pathogens: Fusarium roseum var sambucinum, Fusarium oxysporum, Fusarium 
oxysporum, Fusarium solani var coeruleum, Phytophtora erythroseptica and 
Rhizoctonia solani. All the treatments were efficient against these pathogens and 
especially the 4th treatment which considerably reduces also the dry rot of Fusarium 
solani in potato tubers during storage. This is considered an important result since 
Fusarium solani seems to be the most important pathogen in Tunisian soils. 
Our studies should be carried out in order to determine the better combination 
of organic mixtures, the better method of compost tea extraction (aerobic or 
anaerobic), the optimal period of extraction and doses to be used.

date: 2002
date_type: published
institution: Technical Center of Organic Agriculture
refereed: never
citation: Znaïdi, Akram; Daami, Megda; Ben Kheder, Mohamed and Mahjoub, Mohamed (2002) Study and assessment of compost of different organic mixtures and effect of organic compost tea on plant diseases. Working paper, Technical Center of Organic Agriculture. [ Unpublished, ]
document_url: http://orgprints.org/3079/1/Study_and_assessment_of_compost_of_different_organic_mixtures_and_effects_of_organic_compost_tea_on_plant_diseases.pdf