Abstract
A field study was conducted over 9 months to measure the short-term effect of green waste compost (GWC) application on crop yields, nitrogen (N) availability and emissions of the greenhouse gas, nitrous oxide (N O). The GWC was applied at 0, 2 or 4 t/C ha as GWC with either 0 or 150 kg N/ha fertiliser. The hypothesis was that GWC would lower the soils mineral N content, via microbial immobilisation, resulting in a reduced substrate for microbially mediated nitrification and denitrification reactions and, therefore, reduced NO. However, high N fertiliser rates, the potential re-mineralisation of N from the microbial biomass, and N released from the decomposition of GWC, could provide N substrate for increased N O emissions via nitrification. Additionally, the increased oxygen demand of the microbial biomass, from GWC addition, could increase N O emissions via denitrification. The trial commenced one month after a postharvest GWC application, at lettuce (Latuca sativa 'Pattagonia') transplant and was terminated after the following sorghum (Sorghum bicolour (L.) Moench) crop. The application of GWC did not cause prolonged N immobilisation nor did it affect crop yields. Application of GWC did not significantly affect NO flux. The application of N fertiliser (as 3 applications of 50 kg N/ha) significantly increased NO and CO fluxes (P
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 4
Claim · model-written summary
Green waste compost did not affect crop yields.
- Taxon
- lettuce
Lactuca sativae1 - Treatment
- GWCe0
- Outcome
- crop yieldse0
- Direction
- nor did it affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of GWC did not cause prolonged N immobilisation nor did it affect crop yields.”
e1“lettuce (Latuca sativa 'Pattagonia')”
e2“sorghum (Sorghum bicolour (L.) Moench)”
Claim · model-written summary
Green waste compost did not cause prolonged nitrogen immobilisation.
- Taxon
- lettuceLactuca sativae1
- Treatment
- GWCe0
- Outcome
- N immobilisatione0
- Direction
- did not causee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of GWC did not cause prolonged N immobilisation nor did it affect crop yields.”
e1“lettuce (Latuca sativa 'Pattagonia')”
Claim · model-written summary
Green waste compost did not significantly affect nitrous oxide flux.
- Taxon
- lettuceLactuca sativae1
- Treatment
- GWCe0
- Outcome
- NO fluxe0
- Direction
- did not significantly affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of GWC did not significantly affect NO flux.”
e1“lettuce (Latuca sativa 'Pattagonia')”
Claim · model-written summary
Nitrogen fertilizer significantly increased NO and CO fluxes.
- Taxon
- lettuceLactuca sativae1
- Treatment
- N fertiliser (as 3 applications of 50 kg N/ha)e0
- Outcome
- NO and CO fluxese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of N fertiliser (as 3 applications of 50 kg N/ha) significantly increased NO and CO fluxes”
e1“lettuce (Latuca sativa 'Pattagonia')”
The same questions in other papers
nitrogen · molecular: metabolites · Lactuca sativa (garden lettuce)Positive and negative results
8 papers in the same direction as this paper · 9 in the opposite direction
- positive
- positive
- positive
14 papers more in this group
See all 18 papers →fertilization · molecular: metabolites · Lactuca sativa (garden lettuce)Positive and negative results
11 papers in the same direction as this paper · 51 in the opposite direction
- positive
- positive
- positive
59 papers more in this group
See all 63 papers →fertilization · yield · Lactuca sativa (garden lettuce)Positive and negative results
35 papers in the same direction as this paper · 213 in the opposite direction
- positive
- positive
- positive
245 papers more in this group
See all 249 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.