ALLELOPATHIC EFFECTS OFCHENOPODIUM ALBUML. EXTRACTS ON NITRIFICATION

Abstract

Allelopathic effects of Chenopodium album L. leaf aqueous extract on nitrification were investigated. In the presence of leaf extracts, complete nitrite oxidation to nitrate was delayed significantly. Also, in the presence of leaf extract the amounts of both nitrite and nitrate produced were significantly higher than those in control solutions. This increase was attributed to protein hydrolysis and ammonification of resulting amino acids present in leaf extracts. The delay in nitrification was proposed to be due to the presence of phenolic acids in this plant.

Nutrient leaching and deep drainage under Eucalyptus plantations managed in short rotations after afforestation of an African savanna: Two 7-year time series

“…The inhibition of nitrification through allelopathic chemicals under certain species has been a controversial subject for a long time (White, 1994;Sainte-Marie and Pare, 1999;Jafari and Kholdebarin, 2002;Subbarao et al, 2006a). A low concentration of NO À 3 -N in the soil may be due to the immobilization of NH þ 4 -N rather than the inhibition of the nitrification (Sahrawat, 1996;Meisner et al, 2011).…”

Factors Affecting Nitrification in Soils

“…However, it must be stated that the involvement of allelopathic chemicals on the nitrification process is far from fully established and at times controversial (Rice and Pancholy 1972, 1973, 1974Vitousek et al 1982;White 1994;Ste-Marie and Pare, 1999;Jafari and Kholdebarin 2002;Subbarao et al 2006). This is due to complex interactions among the various factors on nitrification and net nitrate production.…”

The influence of nitrogen fertilization with ENTEC-26 and ammonium nitrate on the concentration of thirty-one elements in carrot (Daucus carota L.) storage roots

“…In research on N-NH 4 stabilization in soil, numerous natural nitrification inhibitors have been tested, including Chenopodium album L. extract (JAFARI, KHOLDEBARIN 2002), natural essential oils or Mentha spicata L. oil (PATRA et al 2002). Additionally, synthetic inhibitors of this process were applied, such as nitrapyrin (ABBASI et al 2003), dicyandiamide /DCD/ (DAVIES, WILLIAMS 1995, BLANKENAU et al 2002, COOKSON, CORNFORTH 2002 or 3.4-dimethylpyrazol phosphate /DMPP/ (ZERULLA et al 2001, HÄHNDEL, WISSE-MEIER 2004, GIOACCHINI et al 2006.…”