Abstract
Abstract Plant biomass production associated with soil organic carbon (C) accumulation is a critical challenge for sustainable agriculture development because soil quality degradation and organic carbon pool depletion have become a concern under some circumstances. To elucidate cover crops and their synergetic effects in biomass production and soil organic C improvement, legume and non-legume winter/summer cover crops, in mono- and biculture (mixture of legume/non-legume) were evaluated in the field and controlled (growth chamber) conditions. Under field conditions, biculture of sunn hemp and sorghum sudangrass produced 24.1 Mg ha−1 in contrast to 20.1 and 2.9 Mg ha−1 for each one alone; and biculture of okra and cowpea reached as much as 11.5 Mg ha−1 in contrast to 2.0 and 5.3 Mg ha−1 for each one in monoculture. After the growth of winter followed by summer cover crops, the soil organic C content increased with substantial quantities of plant biomass returned to the soil. The results suggest that both summer and winter cover crops demonstrate a promising potential in biomass C accumulation, thereby, can play an important role in soil fertility improvement to benefit the sustainable development of agriculture when appropriate types and combinations are selected. Keywords: cover cropdecompositionlegumenon-legumeorganic carbonsoil fertilitybioculturemonoculture Acknowledgments This research was financially supported via a USDA-ARS collaboration research program. Authors thank Dr. Thomas Davenport, Mr. Robert Stubblefield, Jeorge Vergel, Jacob Hall, Ms. Guiqin Yu, and Laura Rosado at TREC, University of Florida for their supports with growth chamber and field facilities and/or help in sample collections and chemical analyses.
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Claims 4
Claim · model-written summary
Biculture of sunn hemp and sorghum sudangrass produced more biomass than either crop alone under field conditions.
Verbatim
e0“their synergetic effects in biomass production”
e2“Under field conditions, biculture of sunn hemp and sorghum sudangrass produced 24.1 Mg ha−1 in contrast to 20.1 and 2.9 Mg ha−1 for each one alone”
Claim · model-written summary
Biculture of okra and cowpea produced more biomass than either crop in monoculture under field conditions.
- Taxon
- okra and cowpea
Vigna unguiculata.jpg?width=60)
Abelmoschus esculentuse3 - Treatment
- biculture of okra and cowpeae3
- Outcome
- biomass productione0
- Direction
- higherinferrede3
- Value
- 11.5 Mg ha−1e3
- Qualifier
- 2.0 and 5.3 Mg ha−1e3
- Comparator
- for each one in monoculturee3
- Setting
- Under field conditionse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“their synergetic effects in biomass production”
e2“Under field conditions, biculture of sunn hemp and sorghum sudangrass produced 24.1 Mg ha−1 in contrast to 20.1 and 2.9 Mg ha−1 for each one alone”
e3“biculture of okra and cowpea reached as much as 11.5 Mg ha−1 in contrast to 2.0 and 5.3 Mg ha−1 for each one in monoculture”
Claim · model-written summary
Growing winter followed by summer cover crops increased soil organic C content.
- Taxon
- cover cropse4
- Treatment
- growth of winter followed by summer cover cropse4
- Outcome
- soil organic C contente4
- Direction
- increasede4
Not reportedComparator
Verbatim
e4“After the growth of winter followed by summer cover crops, the soil organic C content increased with substantial quantities of plant biomass returned to the soil”
Claim · model-written summary
Summer and winter cover crops show promising potential for biomass C accumulation when appropriate types and combinations are selected.
Verbatim
e5“The results suggest that both summer and winter cover crops demonstrate a promising potential in biomass C accumulation, thereby, can play an important role in soil fertility improvement to benefit the sustainable development of agriculture when appropriate types and combinations are selected”
The same questions in other papers
Vigna unguiculata · yield · Abelmoschus esculentus (okra)Positive and negative results
8 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
6 papers more in this group
See all 10 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.