Mass of rhizodeposition

Range ≤600 mg/gram root dry weight
Organism Plants
Reference J.M. Lynch and J.M. Whipps, Substrate flow in the rhizosphere, D. L. Keister and P. B. Cregan (Eds.), The rhizosphere and plant growth, 15-24.© 1991 Kluwer Academic Publishers. p.16 left column bottom paragraph
Primary Source Newman E I 1985 The rhizosphere: carbon sources and microbial populations. In Ecological Interactions in Soil: Plants, Microbes and Animals. Eds. A H Fitter, D Atkinson, D J Read and M BUsher. pp 107-121. Blackwell Scientific Publications, Oxford. & Whipps J M 1990 Carbon economy. In The Rhizosphere. Ed. J M Lynch. pp 59-97. John Wiley, Chichester.
Comments "The major source of substrates for microbial activity in the ectorhizosphere and on the rhizoplane are rhizodeposition products. They are composed of exudates, lysates, mucilage, secretions and dead cell material, as well as gases including respiratory CO2 , Depending on plant species, age and environmental conditions, these can account for up to 40% (or more) of the dry matter produced by plants...Some experiments have been refined to examine the effect of a whole range of factors on rhizodeposition including textural quality (by addition of glass Ballotini or use of artificial soils), anoxia, water stress, cultivar, nutrient sources, environmental parameters and micro-organisms (see Hale and Moore, 1979 Whipps, 1990). Measured in this way, values for rhizodeposition do not exceed 600 mg/gram root dry weight (primary sources)."
Entered by Uri M
ID 110143