creators_name: Marchetti, Rosa
creators_name: Lazzeri, Luca
creators_name: Malaguti, Lorena
creators_name: Orsi, Anna
creators_name: Ponzoni, Gilda
type: conference_item
datestamp: 2008-10-02
lastmod: 2009-08-20 14:37:46
metadata_visibility: show
title: Potentially mineralizable nitrogen is soils green manured with biocidal crops
ispublished: pub
subjects: 4nutrient
subjects: 3compost
full_text_status: public
keywords: green manure, N mineralization, Brassicaceae, methyl bromide, metam sodium
abstract: Biofumigant crops used as green manure, in addition to producing a biocidal effect on some soil-borne pathogens and pests, could represent a source of N for crop nutrition. In two laboratory experiments we compared i) the potentially mineralizable N (PMN) of a silty clay soil after incorporation of glucosinolate-containing (GLS+) and non-containing (GLS–) plants, or after incorporation of metam sodium; and ii) the mineralization rate of different types of soils (silty clay, loam and loamy sand) after green manuring with GLS+ crops. After a 3-month incubation, the PMN of the silty clay soil amended with the GLS+ Brassica juncea was significantly higher than the unamended control and the soil amended with Triticum aestivum and Eruca sativa. Metham sodium, while showing a remarkable nitrification inhibition activity, gave rise to amounts of inorganic N (mainly in the ammonium form) of the same level as B. juncea. Mineralization rate was higher in the loamy sand soil than in the loam and in the silty clay soils. Biofumigant crops used as green manure, by increasing N availability in soil, may represent an interesting source of N for the following crops in organic agriculture.
date: 2008
date_type: published
refereed: yes
citation: Marchetti, Rosa; Lazzeri, Luca; Malaguti, Lorena; Orsi, Anna and Ponzoni, Gilda (2008) Potentially mineralizable nitrogen is soils green manured with biocidal crops. Cultivating the Future Based on Science: 2nd Conference of the International Society of Organic Agriculture Research ISOFAR, Modena, Italy, June 18-20, 2008.
document_url: http://orgprints.org/11969/1/Marchetti_11969_ed.rtf