Abstract
Smallholders crop production systems in Africa are constrained by a variety of factors: among them nutrient deficiency and low soil organic matter status. Groundnut (Arachis hypogea L) production in these areas is usually practiced with no artificial fertilisers or cattle manure as fertilizers are preferably used for staple crops production like maize. Organic composts from municipal landfills provide an alternative source of organic amendment for peri-urban groundnut production. Greenhouse and field studies were conducted during the 2010-11 season to determine whether municipal phosphocomposts can increase groundnut productivity as measured by dry matter, P uptake and yield. The field studies were carried out at two sites, namely Africa University farm and Nyamazura, both in Manicaland province of Zimbabwe. The studies were carried out during the 2010/2011 seasons. Municipal phosphocomposts used in the experiment were made from sewage sludge (SL), vegetable vending waste (VW) and wood processing waste (WW) collected from various sites in the city of Mutare. The wastes were composted with Zimbabwe (Dorowa) phosphate rock (DPR) and sulphur for a period of 56 days before being used for the experiments. Application of the three-municipal organic phosphocomposts produced comparable dry matter with inorganic fertilisers (SSP). Addition of sewage sludge/DPR composts improved dry matter of groundnuts. Leaf P and residual P2O5 were significantly (P<0.05) higher with organic amendments than with other soil ameliorants, except for SSP. The amount of residual phosphorous from sewage sludge compost amended plots was enough to support a succeeding crop of maize (>30 ppm resin extractable). Municipal composts significantly (P<0.001) improved groundnut pod yield compared to control and sole DPR. The study showed that the use of municipal phosphocompost is beneficial in improving groundnut nutrition and productivity. They can therefore be used for groundnut production in areas where soil nutrient sources are scarce and have potential for building phosphorous stocks. Apart from increasing current crop growth, the composts can also help build soil organic matter.
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Claims 8
Claim · model-written summary
Three organic phosphocomposts produced dry matter comparable to SSP.
- Taxon
- groundnut
Arachis hypogaeat0 - Treatment
- three-municipal organic phosphocompostse0
- Outcome
- dry mattere0
- Direction
- comparablee0
- Comparator
- inorganic fertilisers (SSP)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of the three-municipal organic phosphocomposts produced comparable dry matter with inorganic fertilisers (SSP).”
t0“Groundnut”
Claim · model-written summary
Sewage sludge/DPR compost improved groundnut dry matter.
- Taxon
- groundnutsArachis hypogaeae0
- Treatment
- sewage sludge/DPR compostse0
- Outcome
- dry mattere0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Addition of sewage sludge/DPR composts improved dry matter of groundnuts.”
Claim · model-written summary
Organic amendments significantly raised leaf P relative to other ameliorants except SSP.
- Taxon
- GroundnutArachis hypogaeat0
- Treatment
- organic amendmentse0
- Outcome
- Leaf Pe0
- Direction
- highere0
- Qualifier
- except for SSPe0
- Comparator
- other soil ameliorantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf P and residual P2O5 were significantly (P<0.05) higher with organic amendments than with other soil ameliorants, except for SSP.”
t0“Groundnut”
Claim · model-written summary
Organic amendments significantly raised residual P2O5 relative to other ameliorants except SSP.
- Treatment
- organic amendmentse0
- Outcome
- residual P2O5e0
- Direction
- highere0
- Qualifier
- except for SSPe0
- Comparator
- other soil ameliorantse0
Not reportedTaxon
Verbatim
e0“Leaf P and residual P2O5 were significantly (P<0.05) higher with organic amendments than with other soil ameliorants, except for SSP.”
Claim · model-written summary
Residual phosphorus after sewage sludge compost exceeded the threshold for succeeding maize.
Not reportedTaxon
Verbatim
e0“The amount of residual phosphorous from sewage sludge compost amended plots was enough to support a succeeding crop of maize (>30 ppm resin extractable).”
Claim · model-written summary
Municipal composts significantly improved groundnut pod yield versus control.
- Taxon
- groundnutArachis hypogaeae0
- Treatment
- Municipal compostse0
- Outcome
- pod yielde0
- Direction
- improvede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Municipal composts significantly (P<0.001) improved groundnut pod yield compared to control and sole DPR.”
Claim · model-written summary
Municipal composts significantly improved groundnut pod yield versus sole DPR.
- Taxon
- groundnutArachis hypogaeae0
- Treatment
- Municipal compostse0
- Outcome
- pod yielde0
- Direction
- improvede0
- Comparator
- sole DPRe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Municipal composts significantly (P<0.001) improved groundnut pod yield compared to control and sole DPR.”
Claim · model-written summary
The authors recommend municipal phosphocompost for groundnut production where soil nutrients are scarce.
- Taxon
- groundnutArachis hypogaeae0
- Outcome
- groundnut productione0
- Qualifier
- areas where soil nutrient sources are scarcee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“They can therefore be used for groundnut production in areas where soil nutrient sources are scarce”
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