F. Ben Rebah , D. Prévost , A. Yezza , R.D. Tyagi (2007)Bioresource Technology 98,3535–3546
Inoculating legumes with commercial rhizobial inoculants is a common
agriculture practice. Generally, inoculants are sold in liquid or
in solid forms (mixed with carrier). The production of inoculants involves
a step in which a high number of cells are produced, followed
by the product formulation. This process is largely governed by the cost
related to the medium used for rhizobial growth and by the availability
of a carrier source (peat) for production of solid inoculant. Some
industrial and agricultural by-products (e.g. cheese whey, malt
sprouts) contain growth factors such as nitrogen and carbon, which can
support growth of rhizobia. Other agro-industrial wastes (e.g.
plant compost, Wltermud, Xy-ash) can be used as a carrier for rhizobial
inoculant. More recently, wastewater sludge, a worldwide recyclable
waste, has shown good potential for inoculant production as a growth medium
and as a carrier (dehydrated sludge). Sludge usually
contains nutrient elements at concentrations suffcient to sustain rhizobial
growth and heavy metals are usually below the recommended
level. In some cases, growth conditions can be optimized by a sludge
pre-treatment or by the addition of nutrients. Inoculants produced in
wastewater sludge are efficient for nodulation and nitrogen fixation with
legumes as compared to standard inoculants. This new approach
described in this review offers a safe environmental alternative for both
waste treatment/disposal and inoculant production.
https://blog.sciencenet.cn/blog-4834-9959.html
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