Abstract
Abstract Sugarcane ( Saccharum spp.) is increasingly exposed to periodic floods and shallow water tables on Histosols in Florida’s Everglades Agricultural Area (EAA). In the past, when these soils were usually well drained, they provided excess N for sugarcane through microbial oxidation. It is not known if supplemental N would now improve yields because microbial oxidation is reduced by shallow water tables and periodic floods. The purpose of this study was to evaluate the effects of N fertilizer rates on two sugarcane cultivars exposed to a 25‐cm water‐table depth with and without repeated 2‐day floods. Two studies were planted in containers in 2001 and 2002 with two sugarcane cultivars and five equally spaced rates of N fertilizer from 0 to 200 kg ha −1 . Leaf, stalk and root weights were reduced by periodic flooding and the magnitude of the reduction sometimes differed between cultivars. Plant weights, leaf chlorophyll content (SPAD) and leaf N content were often highest near an N rate of 100 kg ha −1 . Usually, N fertilizer rate did not interact with water treatment. Nitrogen fertilization may be useful for sugarcane exposed to water‐table depths of 25 cm with and without 2‐day repeated floods on EAA Histosols.
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Claims 5
Claim · model-written summary
Periodic flooding reduced leaf, stalk and root weights of sugarcane.
Not reportedComparator
Verbatim
t0“Sugarcane”
e1“Leaf, stalk and root weights were reduced by periodic flooding”
Claim · model-written summary
Plant weights, leaf chlorophyll content (SPAD) and leaf N content of sugarcane were often highest near an N rate of 100 kg ha −1.
- Taxon
- Sugarcanet0
- Treatment
- N ratee3
- Outcome
- Plant weights, leaf chlorophyll content (SPAD) and leaf N contente3
- Direction
- higheste3
- Qualifier
- oftene3
Not reportedComparator
Verbatim
t0“Sugarcane”
e3“Plant weights, leaf chlorophyll content (SPAD) and leaf N content were often highest near an N rate of 100 kg ha −1”
Claim · model-written summary
N fertilizer rate did not interact with water treatment in sugarcane.
Not reportedDirection
Verbatim
t0“Sugarcane”
e4“N fertilizer rate did not interact with water treatment”
Claim · model-written summary
The magnitude of flood-related reduction in sugarcane sometimes differed between the two cultivars.
Verbatim
t0“Sugarcane”
e2“the magnitude of the reduction sometimes differed between cultivars”
e6“with two sugarcane cultivars”
Claim · model-written summary
Nitrogen fertilization may be useful for sugarcane exposed to shallow water tables and periodic floods.
Verbatim
e5“Nitrogen fertilization may be useful for sugarcane”
The same questions in other papers
nitrogen · physiology: pigments · Saccharum officinarum (sugarcane)Positive and negative results
5 papers in the same direction as this paper · 1 in the opposite direction
- negative
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See all 7 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.