Polymer-entrapped rhizobium as an inoculant for legumes

Abstract

SummaryField and cylinder experiments conducted in France and in Senegal showed that polyacrylamide, previously proposed as an entrapping gel for preparing Rhizobium inoculants, could be replaced by alginate (AER inoculant) or a mixture of xanthan and carob gum (XER inoculant). Semi-dried or dried AER and XER were used successfully provided that their storage time was less than 90 days. In soil inoculation trials, no marked differences were observed among semi-dried XER, dried AER, and dried XER. A number of seed inoculation experiments indicated that dried XER significantly outranked AER. Seeds preinoculated by up to 48 days with XER yielded plants which were comparable in nodulation and growth parameters to those derived from plant receiving peat inoculation at the time of planting.

Azospirillum: Bioformulations, Product Quality and Survivability

“…These beads are degraded after application to soil by microorganisms and release the entrapped cells into soil. These polymers are proven potential bacterial carriers (Jung et al 1982). The dry beads give an interesting and excellent survival rates over a long period.…”

Observations on the use ofSesbania rostrata as green manure in paddy fields

“…Seeds are inoculated with a culture that is either liquid or adsorbed on a carrier such as peat (Vincent 1970) or entrapped in a polymer (Jung et al 1982). Seed inoculation induces complete root nodulation but only partial stem nodulation.…”

Evaluation of polymers for the liquid rhizobial formulation and their influence in the Rhizobium-Cowpea interaction

“…The polymers were studied with respect to their capacity rheology and importance as carriers of biological inoculants (Jung et al 1982, Deaker et al 2007, Trivedi & Pandey 2008. Additionally, we measured (data no shown) the plant growth promoting activity [quantification of auxin (Glickmann & Dessaux 1995) and phosphate solubilization (Pikovskaya 1948)] of the best prototypes.…”