Abstract
The presence of trash from the mechanical harvest of green cane on sugarcane plantations promotes changes in the agricultural management, for example, in the mechanical cultural practices of ratoon cane in-between the rows and nitrogen (N) fertilization. The goal of this study was to evaluate the performance of sugarcane in different harvest systems, associated to the mechanical cultural practices in interrows and N rates. The study was carried out on a sugarcane plantation in Sales Oliveira, São Paulo, Brazil, with the sugarcane variety SP81-3250, on soil classified as Acrudox, in a randomized block design with split-split plots and four replications. The main treatments consisted of harvest systems (harvesting green cane or burnt cane), the secondary treatment consisted of the mechanical cultural practices in the interrows and the tertiary treatments were N rates (0, 30, 60, 90, 120 and 160 kg ha-1), using ammonium nitrate (33 % N) as N source. The harvest systems did not differ in sugarcane yield (tons of cane per hectare - TCH), but in burnt cane, the pol percent and total sugar recovery (TSR) were higher. This could be explained by the higher quantity of plant impurities in the harvested raw material in the system without burning, which reduces the processing quality. Mechanical cultural practices in the interrows after harvest had no effect on cane yield and sugar quality, indicating that this operation can be omitted in areas with mechanical harvesting. The application of N fertilizer at rates of 88 and 144 kg ha-1 N, respectively, increased stalk height and TCH quadratically to the highest values for these variables. For the sugar yield per hectare (in pol %), N fertilization induced a linear increase.
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Claims 8
Claim · model-written summary
Green-cane and burnt-cane harvest systems did not differ in sugarcane yield (tons of cane per hectare).
- Taxon
- sugarcanee0
- Treatment
- harvest systemse1
- Outcome
- sugarcane yielde1
- Direction
- did not differe1
- Setting
- Sales Oliveira, São Paulo, Brazile0
Not reportedComparator
Verbatim
e0“The study was carried out on a sugarcane plantation in Sales Oliveira, São Paulo, Brazil”
e1“The harvest systems did not differ in sugarcane yield (tons of cane per hectare - TCH)”
Claim · model-written summary
Burnt-cane harvest gave higher pol percent and total sugar recovery than green-cane harvest.
Verbatim
e0“The study was carried out on a sugarcane plantation in Sales Oliveira, São Paulo, Brazil”
e1“burnt cane, the pol percent and total sugar recovery (TSR) were higher”
e2“harvesting green cane or burnt cane”
Claim · model-written summary
The authors suggest the lower processing quality of green cane could be explained by the higher quantity of plant impurities in the raw material of the system without burning.
Verbatim
e0“The study was carried out on a sugarcane plantation in Sales Oliveira, São Paulo, Brazil”
e1“This could be explained by the higher quantity of plant impurities in the harvested raw material in the system without burning, which reduces the processing quality”
Claim · model-written summary
Mechanical cultural practices in the interrows after harvest had no effect on cane yield and sugar quality.
- Taxon
- sugarcanee0
- Treatment
- Mechanical cultural practices in the interrowse1
- Outcome
- cane yield and sugar qualitye1
- Direction
- had no effecte1
- Setting
- Sales Oliveira, São Paulo, Brazile0
Not reportedComparator
Verbatim
e0“The study was carried out on a sugarcane plantation in Sales Oliveira, São Paulo, Brazil”
e1“Mechanical cultural practices in the interrows after harvest had no effect on cane yield and sugar quality”
Claim · model-written summary
The authors conclude that the interrow mechanical operation can be omitted in areas with mechanical harvesting.
Verbatim
e0“The study was carried out on a sugarcane plantation in Sales Oliveira, São Paulo, Brazil”
e1“this operation can be omitted in areas with mechanical harvesting”
Claim · model-written summary
N fertilizer at 88 kg ha-1 N increased stalk height quadratically to its highest value.
- Taxon
- sugarcanee0
- Treatment
- N fertilizere1
- Outcome
- stalk heighte1
- Direction
- increasede1
- Value
- 88e1
- Qualifier
- quadraticallye1
- Setting
- Sales Oliveira, São Paulo, Brazile0
Not reportedComparator
Verbatim
e0“The study was carried out on a sugarcane plantation in Sales Oliveira, São Paulo, Brazil”
e1“The application of N fertilizer at rates of 88 and 144 kg ha-1 N, respectively, increased stalk height and TCH quadratically to the highest values for these variables”
Claim · model-written summary
N fertilizer at 144 kg ha-1 N increased cane yield (TCH) quadratically to its highest value.
- Taxon
- sugarcanee0
- Treatment
- N fertilizere1
- Outcome
- TCHe1
- Direction
- increasede1
- Value
- 144 kg ha-1 Ne1
- Qualifier
- quadraticallye1
- Setting
- Sales Oliveira, São Paulo, Brazile0
Not reportedComparator
Verbatim
e0“The study was carried out on a sugarcane plantation in Sales Oliveira, São Paulo, Brazil”
e1“The application of N fertilizer at rates of 88 and 144 kg ha-1 N, respectively, increased stalk height and TCH quadratically to the highest values for these variables”
Claim · model-written summary
N fertilization induced a linear increase in sugar yield per hectare.
- Taxon
- sugarcanee0
- Treatment
- N fertilizatione1
- Outcome
- sugar yield per hectaree1
- Direction
- increasee1
- Qualifier
- lineare1
Not reportedComparator
Verbatim
e0“The study was carried out on a sugarcane plantation in Sales Oliveira, São Paulo, Brazil”
e1“For the sugar yield per hectare (in pol %), N fertilization induced a linear increase”
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