Abstract
Despite interest in mucuna ( Mucuna pruriens ) as a green manure/cover crop, biomass production of its accessions has been poorly quantified, including in the Los Tuxtlas region of Veracruz, Mexico where smallholders have used maize ( Zea mays )-mucuna systems increasingly since 1991. This on-farm research compared the biomass production of three mucuna varieties (white-, mottled-, and black seeded) in a rotational maize-mucuna system. Mucuna was sole-cropped during the first season (on eleven and five fields in 1996 and 1997 respectively), and its impact on the second-season maize yield was measured (on seven fields in 1996). White and mottled varieties produced equal biomass (7.92 and 6.74 t ha −1 in 1996 and 1997 respectively), and more than the black variety (6.85 and 4.90 t ha −1 in 1996 and 1997 respectively). Mucuna increased 1996/97 second-season maize grain yields by 50 % (from 0.97 to 1.46 t ha −1 ). Plots previously cropped with white and mottled varieties produced greater maize yield (1.55 t ha −1 ) than did black-variety plots (1.29 t ha −1 ). The research confirmed the higher productivity of the white and mottled varieties and the potential of the rotational system. Allocating the more desirable first-season growth period to mucuna and the riskier second season to maize is problematic, but the system may have potential in the region as a short-term fallow that permits second-season maize production.
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Claims 4
Claim · model-written summary
White and mottled mucuna varieties produced equal biomass and more than the black variety.
MucunaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“White and mottled varieties produced equal biomass (7.92 and 6.74 t ha −1 in 1996 and 1997 respectively), and more than the black variety (6.85 and 4.90 t ha −1 in 1996 and 1997 respectively).”
e1“mucuna ( Mucuna pruriens )”
Claim · model-written summary
Mucuna rotation increased second season maize grain yield by 50%.
- Treatment
- Mucunae0
- Outcome
- second-season maize grain yieldse0
- Direction
- increasede0
- Value
- 50 %e0
- Qualifier
- from 0.97 to 1.46 t ha −1e0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mucuna increased 1996/97 second-season maize grain yields by 50 % (from 0.97 to 1.46 t ha −1 ).”
Claim · model-written summary
White and mottled mucuna preceding crops yielded more maize than black variety plots.
- Treatment
- white and mottled varietiese0
- Outcome
- maize yielde0
- Direction
- greatere0
- Value
- 1.55 t ha −1e0
- Qualifier
- 1.29 t ha −1e0
- Comparator
- black-variety plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plots previously cropped with white and mottled varieties produced greater maize yield (1.55 t ha −1 ) than did black-variety plots (1.29 t ha −1 ).”
Claim · model-written summary
The authors suggest the rotation may serve as a short term fallow allowing second season maize production.
- Outcome
- short-term fallow that permits second-season maize productione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the system may have potential in the region as a short-term fallow that permits second-season maize production.”
The same questions in other papers
Mucuna · yield · Zea mays (maize)Results differ
8 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- negative
- positive
7 papers more in this group
See all 11 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.