Perennial crops survive for 40-50 years in tandem , without experiencing any decline in productivity . But , many a times , this is not the case , for eaxmple , apple , pear, peach , tea and many more crops over the years experience negative rhizosphere effects , with the result , crop performance starts declining . Eventually , crop either survives with reduced performance or perishes for ever. In this background , i have few querries , need your threadbear responses :
*What are the underlying processes leading to negative rhizosphere effect?
* What is the resultant effect of negative rhizopshere effect?
* What kind of crops get exposed to negative rhizosphere effect more often than not?
*Do you feel, negative rhizopshere effect is responsible for reduced crop perfformance?
* Do you feel , somewhere , such negative rhizosphere effect is responsible for loss of biodiversty?
* What the long term implications of negative rhizosphere effect on soil fertility or carrying capacity of soil ?
My thanks n great regards
Hi.
I hope the following information is useful to you.
Although the following information applies to wheat crops, it may be helpful in understanding changes in the structure of the rhizosphere over time.
Community Structure, Species Variation, and Potential Functions of Rhizosphere-Associated Bacteria of Different Winter Wheat (Triticum aestivum) Cultivars.
Front. Plant Sci. https://doi.org/10.3389/fpls.2017.00132
The Effects of Cropping Regimes on Fungal and Bacterial Communities of Wheat and Faba Bean in a Greenhouse Pot Experiment Differ between Plant Species and Compartment.
Front. Microbiol. https://doi.org/10.3389/fmicb.2017.00902
Mendes, L., Kuramae, E., Navarrete, A. et al. Taxonomical and functional microbial community selection in soybean rhizosphere. ISME J 8, 1577–1587 (2014). https://doi.org/10.1038/ismej.2014.17
Regards.
Daer Hermes, Please find the attached papers. I think these will be helpful to your queries. Regards.
@ Anup, the rhizosphere is a dynamic region governed by complex interactions between plants and the organisms that are in close association with the root. The composition and pattern of root exudates affect microbial activity and population numbers, which in turn have an positive, negative and neutral effect on plants. Beneficial or harmful relationships exist between rhizosphere organisms and plants, which ultimately affect root function and plant growth. In addition, the rhizosphere may include organisms that do not directly benefit or harm plants but clearly influence plant growth and productivity. In general, during negative rhizosphere effect crop survives with reduced performance. Sometimes, harmful root exudates, pH and harmful surrounding organisms (both micro and macro) can cause the negative rhizosphere effect. It is very common under tea garden and under some trees.Negative effect also may affect biodiversity as well as soil fertility including soil carbon build up.
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