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Publication
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| Title of Article |
Soil column-based experimental design to assess the impact of compost and vermicompost amendments on maize biomass |
| Date of Acceptance |
27 March 2017 |
| Journal |
| Title of Journal |
Asia-Pacific Journal of Science and Technology |
| Standard |
SCOPUS |
| Institute of Journal |
Khon Kaen University |
| ISBN/ISSN |
2539-6293 |
| Volume |
2017 |
| Issue |
22 |
| Month |
March |
| Year of Publication |
2019 |
| Page |
1-9 |
| Abstract |
Most experiments measuring the positive impact of organic matter (OM) amendments on plant water stress were
conducted in pots and did not take into account the vertical extension of the plant root system. Our goal was to
build an experimental setup able to mimic the geometry of organic amendments distribution relative to plants, i.e.
amendments mixed with the top layer (0-10 cm) when most of the roots develop below this layer. We had 2
objectives (i) to test our soil water monitoring instruments and (ii) to check if a promoting effect of OM
amendments on the growth of maize (Zea mays L.) plants was possible in soil columns. The PVC columns (60
cm high, 20 cm diameter) were filled with a loamy soil; the organic amendments were mixed with the top layer
at a rate of 20 t/ha. We controlled 3 variables: the type of organic amendments (compost vs vermicompost),
fertilizer amount (high/low amount) and soil compaction (high/low). Water stress was induced by gradually letting
the soil dry to 50 % of the field capacity. Plant growth and soil water status were measured simultaneously during
6 weeks; at the end of experiment above and below ground biomass were measured. In the presence compared to
the absence of OM, the plant height and plant above ground biomass were significantly higher, approximately
multiplied by 2. Despite similar soil porosity in control and vermicompost columns, the latter had significantly
our technical experiment has shown that the characteristics of our columns and our monitoring instruments were
able to record changes in soil water content that could be associated to difference in plant development. A very
strong promoting effect of OM was measured, but no difference was observed between compost and
vermicompost as the experimental design was made mainly for technical purpose. |
| Keyword |
water stress, organic matter, bulk density, biomass, maize |
| Author |
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| Reviewing Status |
มีผู้ประเมินอิสระ |
| Status |
ตีพิมพ์แล้ว |
| Level of Publication |
นานาชาติ |
| citation |
false |
| Part of thesis |
true |
| Attach file |
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| Citation |
0
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Journal Publication
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