Abstract
The effects of plant age at the time of mowing on sunn hemp (Crotalaria juncea L.) tissue decomposition, nitrogen (N) release, and fiber content in Krome very gravelly loam were assessed. Combined leaf and stem tissue from 42-, 77- or 112-day-old sunn hemp plants was placed in mesh bags and buried below the soil surface in the field. Bags were removed bi-weekly and dry weights, N concentration, acid detergent fiber (ADF) and neutral detergent fiber (NDF) concentrations in buried sunn hemp tissues were determined. There was a rapid decrease plant tissue dry weight during the first 14 days after tissue was buried, followed by a slow gradual decrease. The amount N per hectare was much lower for 42-day-old than 112-day-old sunn hemp. Tissue of the youngest plants decomposed the quickest. Forty two-day-old tissue had a higher N concentration, N mineralization rate, and lower NDF and ADF than 77- or 112-day-old tissue. Mowing and soil incorporation of a 42-day-old instead of a 77- to 112-day-old sunn hemp cover crop prior to planting a cash crop can be beneficial for a fast-growing cash crop planted soon after soil incorporation of the cover crop.
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Claims 7
Claim · model-written summary
Buried sunn hemp tissue dry weight declined rapidly in the first 14 days, then slowly.
- Taxon
- sunn hemp
Crotalaria junceat0 - Outcome
- plant tissue dry weighte0
- Direction
- decreasee0
- Qualifier
- first 14 dayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rapid decrease plant tissue dry weight during the first 14 days after tissue was buried, followed by a slow gradual decrease”
t0“sunn hemp”
Claim · model-written summary
The amount of nitrogen per hectare was lower in 42-day-old than 112-day-old sunn hemp.
- Taxon
- sunn hempCrotalaria junceae0
- Outcome
- amount N per hectaree0
- Direction
- much lowere0
- Qualifier
- 42-day-olde0
- Comparator
- 112-day-old sunn hempe0
Not reportedMaterial
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The amount N per hectare was much lower for 42-day-old than 112-day-old sunn hemp”
Claim · model-written summary
Tissue from the youngest sunn hemp plants decomposed fastest.
- Taxon
- sunn hempCrotalaria junceat0
- Outcome
- Tissue of the youngest plants decomposed the quickeste0
- Direction
- quickeste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tissue of the youngest plants decomposed the quickest”
t0“sunn hemp”
Claim · model-written summary
Forty two-day-old sunn hemp tissue had higher nitrogen concentration than older tissue.
- Taxon
- sunn hempCrotalaria junceat0
- Outcome
- N concentratione0
- Direction
- highere0
- Qualifier
- Forty two-day-old tissuee0
- Comparator
- 77- or 112-day-old tissuee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Forty two-day-old tissue had a higher N concentration, N mineralization rate, and lower NDF and ADF than 77- or 112-day-old tissue”
t0“sunn hemp”
Claim · model-written summary
Forty two-day-old sunn hemp tissue had a higher nitrogen mineralization rate than older tissue.
- Taxon
- sunn hempCrotalaria junceat0
- Outcome
- N mineralization ratee0
- Direction
- highere0
- Comparator
- 77- or 112-day-old tissuee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Forty two-day-old tissue had a higher N concentration, N mineralization rate, and lower NDF and ADF than 77- or 112-day-old tissue”
t0“sunn hemp”
Claim · model-written summary
Forty two-day-old sunn hemp tissue had lower NDF and ADF than older tissue.
- Taxon
- sunn hempCrotalaria junceat0
- Outcome
- NDF and ADFe0
- Direction
- lowere0
- Comparator
- 77- or 112-day-old tissuee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Forty two-day-old tissue had a higher N concentration, N mineralization rate, and lower NDF and ADF than 77- or 112-day-old tissue”
t0“sunn hemp”
Claim · model-written summary
The authors recommend incorporating a 42-day-old rather than older sunn hemp cover crop before a fast-growing cash crop.
- Taxon
- sunn hempCrotalaria junceae0
- Outcome
- Mowing and soil incorporation of a 42-day-old instead of a 77- to 112-day-old sunn hemp cover crope0
- Comparator
- 77- to 112-day-old sunn hemp cover crope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mowing and soil incorporation of a 42-day-old instead of a 77- to 112-day-old sunn hemp cover crop prior to planting a cash crop can be beneficial for a fast-growing cash crop planted soon after soil incorporation of the cover crop”