Paper · 2014 · Soil Science & Plant Nutrition

White clover living mulch controlled only by mowing supplies nitrogen to corn

Shin Deguchi; Sunao Uozumi; Eiko Touno; et al.

5
claims
8
verbatim quotes
7
citations
2
research areas
—
Not open access

Abstract

A field experiment was conducted to investigate the effects of white clover (Trifolium repens L.) living mulch controlled only by mowing on the nitrogen (N) nutrition and yield of silage corn (Zea mays L.). Eight treatments were tested: one living mulch treatment without N application and seven conventional cultivation treatments with different N applications (0–200 kg ha−1). White clover was sown in the living mulch treatment in August. The next May, white clover shoots in the living mulch treatment were clipped and left in the field. After tilling the conventional cultivation treatments, corn was sown. At the time when the corn was sown, the N uptake of the white clover shoots was 173 kg ha−1. Measurements at 40 days after the sowing of corn (40 DAS) revealed that the N concentration of corn shoots grown in the living mulch treatment was lower than that in the conventional cultivation treatment without N application. At harvest (123 DAS), compared with that in the conventional cultivation treatment without N application, the N uptake of corn shoots in the living mulch treatment increased by 31.8 kg ha−1. Based on the N uptake and the yield of corn, the fertilizer N equivalencies of living mulch were 62 and 70 kg ha−1 at harvest, respectively. These results indicate that living mulch controlled only by mowing increases the N uptake of corn and may reduce the N application required for corn production.

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Claims 5

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Living mulch controlled only by mowing increased corn shoot N uptake by 31.8 kg ha−1 at harvest compared with conventional cultivation without N application.

Treatment
living mulch controlled only by mowingt0
Outcome
N uptake of corn shootse2
Direction
increasede2
Value
31.8 kg ha−1e2
Comparator
conventional cultivation treatment without N applicatione2

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

t0

“living mulch controlled only by mowing supplies nitrogen to corn”

✓ located verbatim in the source · title, characters 13–77 · show in text ↑
e2

“compared with that in the conventional cultivation treatment without N application, the N uptake of corn shoots in the living mulch treatment increased by 31.8 kg ha−1”

✓ located verbatim in the source · abstract, characters 955–1122 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Corn shoot N concentration at 40 days after sowing was lower under living mulch than under conventional cultivation without N application.

Treatment
living mulch treatmente3
Outcome
N concentration of corn shootse3
Direction
lowere3
Qualifier
40 days after the sowing of corne3
Comparator
conventional cultivation treatment without N applicatione3

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

t0

“living mulch controlled only by mowing supplies nitrogen to corn”

✓ located verbatim in the source · title, characters 13–77 · show in text ↑
e3

“Measurements at 40 days after the sowing of corn (40 DAS) revealed that the N concentration of corn shoots grown in the living mulch treatment was lower than that in the conventional cultivation treatment without N application”

✓ located verbatim in the source · abstract, characters 705–931 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

White clover shoots held 173 kg ha−1 of N when corn was sown.

Taxon
white cloverTrifolium repense4
Outcome
N uptake of the white clover shootse4
Value
173 kg ha−1e4

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Trifolium repens
Trifolium repens · TaxonIvar Leidus · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e4

“the N uptake of the white clover shoots was 173 kg ha−1”

✓ located verbatim in the source · abstract, characters 648–703 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

The fertilizer N equivalency of living mulch at harvest was 62 and 70 kg ha−1, based on N uptake and yield of corn.

Outcome
fertilizer N equivalenciese5
Value
62 and 70 kg ha−1e5
Qualifier
Based on the N uptake and the yield of corne5

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

t0

“living mulch controlled only by mowing supplies nitrogen to corn”

✓ located verbatim in the source · title, characters 13–77 · show in text ↑
e5

“Based on the N uptake and the yield of corn, the fertilizer N equivalencies of living mulch were 62 and 70 kg ha−1 at harvest, respectively”

✓ located verbatim in the source · abstract, characters 1124–1263 · show in text ↑
Recommendationauthor interpretationoriginal resultpositivebasis n/a

Claim · model-written summary

Living mulch controlled only by mowing may reduce the N application required for corn production.

Outcome
N application required for corn productione6
Direction
reducee6

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e6

“may reduce the N application required for corn production”

✓ located verbatim in the source · abstract, characters 1367–1424 · show in text ↑

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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.