Abstract
Sugarcane ( Saccharum spp.) is routinely exposed to periodic floods and high water tables in Florida's Everglades Agricultural Area. Learning sugarcane responses to these conditions will help improve yields. This study evaluated the effects of constant water‐table depths, periodic floods, and N on cane and sucrose yields of two sugarcane cultivars. In 2001 and 2002, two foliar N and four water treatments were applied to the first two crop‐growth cycles (plant and first‐ratoon crops) of ‘CP 72‐2086’ and ‘CP 80‐1827’ in lysimeters filled with Pahokee muck soil. Constant water‐table depths were 23, 37, and 51 cm. A fourth treatment was flooding for 2 d in each of eight 14‐d cycles per year; otherwise its water‐table depth was 44 cm. Foliar N did not consistently affect yields. In nonflooded treatments across cultivars and crop growth cycles, for every centimeter increase in water‐table depth, theoretical recoverable sucrose decreased by 0.13 g kg −1 , and cane and sucrose yields increased by 0.16 and 0.02 kg m −2 , respectively. By cultivar and crop‐growth cycle, the only significant linear responses to nonflooded water‐table treatments were in the first‐ratoon crop, where for each centimeter increase in water‐table depth, cane and sucrose yields increased by 0.38 and 0.04 kg m −2 , respectively. Periodic flooding increased cane and sucrose yields in the plant crop and sustained or improved these yields in the first‐ratoon crop. After rains, allowing floods to remain for up to 2 d may improve yields and reduce P discharge to the Everglades.
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Claims 9
Claim · model-written summary
Foliar N did not consistently affect yield.
Not reportedComparator
Verbatim
e0“Foliar N did not consistently affect yields”
t0“Sugarcane”
Claim · model-written summary
Each centimeter deeper water table reduced recoverable sucrose by 0.13 g kg −1 in nonflooded treatments.
Verbatim
e0“for every centimeter increase in water‐table depth, theoretical recoverable sucrose decreased by 0.13 g kg −1”
t0“Sugarcane”
Claim · model-written summary
Each centimeter deeper water table raised cane yield by 0.16 kg m −2 across cultivars and cycles.
Verbatim
e0“for every centimeter increase in water‐table depth, theoretical recoverable sucrose decreased by 0.13 g kg −1 , and cane and sucrose yields increased by 0.16 and 0.02 kg m −2 , respectively”
t0“Sugarcane”
Claim · model-written summary
Each centimeter deeper water table raised sucrose yield by 0.02 kg m −2 across cultivars and cycles.
Verbatim
e0“for every centimeter increase in water‐table depth, theoretical recoverable sucrose decreased by 0.13 g kg −1 , and cane and sucrose yields increased by 0.16 and 0.02 kg m −2 , respectively”
t0“Sugarcane”
Claim · model-written summary
First ratoon cane yield rose by 0.38 kg m −2 per centimeter deeper water table.
Verbatim
e0“for each centimeter increase in water‐table depth, cane and sucrose yields increased by 0.38 and 0.04 kg m −2 , respectively”
t0“Sugarcane”
Claim · model-written summary
First ratoon sucrose yield rose by 0.04 kg m −2 per centimeter deeper water table.
Verbatim
e0“for each centimeter increase in water‐table depth, cane and sucrose yields increased by 0.38 and 0.04 kg m −2 , respectively”
t0“Sugarcane”
Claim · model-written summary
Periodic flooding increased plant-crop cane and sucrose yield.
- Taxon
- Sugarcanet0
- Organ / stage
- plant crope0
- Treatment
- Periodic floodinge0
- Outcome
- cane and sucrose yieldse0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Periodic flooding increased cane and sucrose yields in the plant crop”
t0“Sugarcane”
Claim · model-written summary
Periodic flooding sustained or improved first-ratoon yields.
- Taxon
- Sugarcanet0
- Organ / stage
- first‐ratoon crope0
- Treatment
- Periodic floodinge0
- Outcome
- these yieldse0
- Direction
- sustained or improvede0
Not reportedComparator
Verbatim
e0“Periodic flooding increased cane and sucrose yields in the plant crop and sustained or improved these yields in the first‐ratoon crop”
t0“Sugarcane”
Claim · model-written summary
The authors suggest retaining floods for up to 2 days after rain to improve yields and reduce phosphorus discharge.
Verbatim
e0“After rains, allowing floods to remain for up to 2 d may improve yields and reduce P discharge to the Everglades”
t0“Sugarcane”
The same questions in other papers
flooding · yield · Saccharum officinarum (sugarcane)Results differ
3 papers in the same direction as this paper · 4 in the opposite direction
- no effect
- no effect
- positive
4 papers more in this group
See all 8 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.