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Composts in growing media: What's new and what's next?
Year:
2013
Source of publication :
Acta Horticulturae
Authors :
Raviv, Michael
;
.
Volume :
982
Co-Authors:
Raviv, M., Dept. of Environmental Horticulture, Agricultural Research Organization, Newe Ya'ar Research Center, Israel
Facilitators :
From page:
39
To page:
52
(
Total pages:
14
)
Abstract:
In the last decades the fraction of fresh produce and cut flowers that are grown in soilless media are constantly growing due to the inherent advantages of substrates over soils. Peat moss is being used for many years as a main component of soilless media, mainly due to its excellent physical properties. Recently peat is frequently replaced by a variety of recycled, aerobically-stabilized materials, also known as composts. This trend is driven by the societal need to recycle organic wastes in an environmentally-sensitive manner, by the rising cost of peat and by peat conduciveness to several soil-borne diseases. Proper composting of many types of organic wastes achieves a number of important objectives. It should eliminate phytotoxicity, pathogens and weed seeds, and stabilize the material with respect to N and oxygen demand of microorganisms. In addition, some composts are suppressive against several soil-borne diseases. Compost maturity is a crucial characteristic in relation to its use in growing media. It ensures minimal medium shrinkage, oxygen consumption, nitrogen immobilization and phytotoxicity. Feedstocks for composts include bark, sawdust, spent mushroom compost, grape marc, composted green wastes, rice hulls, animal manures, biowaste and others. Limitations to the use of composts in growing media are their physical properties (high bulk density, low content of easily available water), salinity, high pH and rate of residual degradation with time. As a result, normally the fraction of the compost in the mixture should not exceed 50%, although some exceptions exist. Advantages of composts as ingredients of growing media include their low cost, nutritional contribution and suppressiveness against soil-borne diseases. A clear advantage of composts used in substrates is that most of them can be further recycled, after the end of the growing cycle, by soil application. Required future research includes the effect of composting techniques and feedstocks on compost characteristics and predicted performance. The effect of compost storage on the shelf life of its desirable properties should also be studied.
Note:
Related Files :
Animalia
Basidiomycota
compost
growing media
nutrition
Peat moss
Physical properties
Sphagnum
Vitaceae
Show More
Related Content
More details
DOI :
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
29589
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:48
Scientific Publication
Composts in growing media: What's new and what's next?
982
Raviv, M., Dept. of Environmental Horticulture, Agricultural Research Organization, Newe Ya'ar Research Center, Israel
Composts in growing media: What's new and what's next?
In the last decades the fraction of fresh produce and cut flowers that are grown in soilless media are constantly growing due to the inherent advantages of substrates over soils. Peat moss is being used for many years as a main component of soilless media, mainly due to its excellent physical properties. Recently peat is frequently replaced by a variety of recycled, aerobically-stabilized materials, also known as composts. This trend is driven by the societal need to recycle organic wastes in an environmentally-sensitive manner, by the rising cost of peat and by peat conduciveness to several soil-borne diseases. Proper composting of many types of organic wastes achieves a number of important objectives. It should eliminate phytotoxicity, pathogens and weed seeds, and stabilize the material with respect to N and oxygen demand of microorganisms. In addition, some composts are suppressive against several soil-borne diseases. Compost maturity is a crucial characteristic in relation to its use in growing media. It ensures minimal medium shrinkage, oxygen consumption, nitrogen immobilization and phytotoxicity. Feedstocks for composts include bark, sawdust, spent mushroom compost, grape marc, composted green wastes, rice hulls, animal manures, biowaste and others. Limitations to the use of composts in growing media are their physical properties (high bulk density, low content of easily available water), salinity, high pH and rate of residual degradation with time. As a result, normally the fraction of the compost in the mixture should not exceed 50%, although some exceptions exist. Advantages of composts as ingredients of growing media include their low cost, nutritional contribution and suppressiveness against soil-borne diseases. A clear advantage of composts used in substrates is that most of them can be further recycled, after the end of the growing cycle, by soil application. Required future research includes the effect of composting techniques and feedstocks on compost characteristics and predicted performance. The effect of compost storage on the shelf life of its desirable properties should also be studied.
Scientific Publication
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