Abstract
This study was conducted to identify the crop management options—the combinations of various cultivars, irrigation amounts, planting dates, and soils—that would maximize the energy sustainability and eco-friendliness of maize (Zea mays L.) stover-based ethanol production systems in the Mississippi Delta. Stover yields simulated with CERES-Maize were used to compute net energy value (NEV) and carbon credit balance (CCB), the indicators of sustainability and eco-friendliness of ethanol production, respectively, for various scenarios. As the results showed, deeper soils with higher water holding capacities had larger NEV and CCB values. Both NEV and CCB had sigmoid relationships with irrigation amount and planting date and could be maximized by planting the crop during the optimum planting window. Stover yield had positive effects on NEV and CCB, whereas travel distance had negative. The influence of stover yield was larger than that of travel distance, indicating that increasing feedstock yields should be emphasized over reducing travel distance. The NEV and CCB values indicated that stover-based ethanol production in the Mississippi Delta is sustainable and environmentally friendly. The study demonstrated that the energy sustainability and eco-friendliness of maize stover-based ethanol production could be increased with alternative crop management options.
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Claims 10
Claim · model-written summary
Deeper soils with greater water holding capacity produced larger modeled net energy value.
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“deeper soils with higher water holding capacities had larger NEV and CCB values”
t0“Maize”
Claim · model-written summary
Deeper soils with greater water holding capacity produced larger modeled carbon credit balance.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“deeper soils with higher water holding capacities had larger NEV and CCB values”
t0“Maize”
Claim · model-written summary
Net energy value and carbon credit balance had sigmoid relationships with irrigation amount and planting date.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both NEV and CCB had sigmoid relationships with irrigation amount and planting date and could be maximized by planting the crop during the optimum planting window”
t0“Maize”
Claim · model-written summary
Planting in the optimum window maximized modeled NEV and CCB.
- Treatment
- planting the crop during the optimum planting windowe0
- Outcome
- NEV and CCBe0
- Direction
- maximizede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both NEV and CCB had sigmoid relationships with irrigation amount and planting date and could be maximized by planting the crop during the optimum planting window”
t0“Maize”
Claim · model-written summary
Greater stover yield increased modeled NEV and CCB.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stover yield had positive effects on NEV and CCB, whereas travel distance had negative”
t0“Maize”
Claim · model-written summary
Longer travel distance decreased modeled NEV and CCB.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stover yield had positive effects on NEV and CCB, whereas travel distance had negative”
t0“Maize”
Claim · model-written summary
Stover yield influenced the balances more than travel distance.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The influence of stover yield was larger than that of travel distance”
t0“Maize”
Claim · model-written summary
Increasing feedstock yields should receive greater emphasis than shortening travel distance.
- Outcome
- increasing feedstock yields should be emphasized over reducing travel distancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing feedstock yields should be emphasized over reducing travel distance”
t0“Maize”
Claim · model-written summary
The modeled NEV and CCB indicated sustainable, environmentally friendly stover ethanol production in the Mississippi Delta.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The NEV and CCB values indicated that stover-based ethanol production in the Mississippi Delta is sustainable and environmentally friendly”
t0“Maize”
Claim · model-written summary
Alternative crop management options could increase modeled energy sustainability and eco-friendliness.
- Outcome
- energy sustainability and eco-friendlinesse0
- Direction
- increasede0
- Qualifier
- alternative crop management optionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“energy sustainability and eco-friendliness of maize stover-based ethanol production could be increased with alternative crop management options”
The same questions in other papers
sowing time · molecular: metabolites · Zea mays (maize)Positive and negative results
6 papers in the same direction as this paper · 2 in the opposite direction
- negative
- no effect
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5 papers more in this group
See all 9 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.