Abstract
Mineral soils in southern Florida are very low in organic matter content and most of the nitrogen (N) for sugarcane (Saccharum spp.) must be supplied in split fertilizer applications. Information is needed regarding how the interaction of organic amendments and fertilizer N influences sugarcane yields. A field study on a sand soil (Alfisol) was established to determine (1) potential sugarcane yield benefits of a compost/sludge amendment, and (2) the influence of the amendment on N fertilizer requirement. A split-plot Latin square design was used with five N rates (main plots) and presence or absence of compost/sludge broadcast at 113 m3 ha−1 (subplots). Annual N rates were 0, 67, 134, 202, and 269 kg N ha−1. Compost/sludge application increased cumulative t sucrose ha−1 by 36% averaged across N rates. The amendment also lowered annual N requirement by an average of 38%, but maintenance applications of compost/sludge will be required every four years.
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Claims 3
Claim · model-written summary
Compost/sludge increased cumulative sucrose yield by 36% across nitrogen rates.
- Taxon
- sugarcanet0
- Treatment
- Compost/sludge applicatione0
- Outcome
- cumulative t sucrose ha−1e0
- Direction
- increasede0
- Value
- 36%e0
- Qualifier
- averaged across N ratese0
Not reportedComparator
Verbatim
e0“Compost/sludge application increased cumulative t sucrose ha−1 by 36% averaged across N rates.”
t0“sugarcane”
Claim · model-written summary
The amendment lowered annual nitrogen requirement by an average of 38%.
Not reportedComparator
Verbatim
e0“The amendment also lowered annual N requirement by an average of 38%, but maintenance applications of compost/sludge will be required every four years.”
t0“sugarcane”
Claim · model-written summary
The authors conclude that compost/sludge needs maintenance applications every four years.
Verbatim
e0“maintenance applications of compost/sludge will be required every four years.”
t0“sugarcane”
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fertilization · molecular: metabolites · Saccharum officinarum (sugarcane)Positive and negative results
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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.