Abstract
The effects of crop rotation on diseases and yield of kidney bean were investigated using six of the plots in the long-term crop rotation experiment established since 1959 at the Hokkaido Prefectural Kitami Agricultural Experiment Station, Hokkaido, Japan. Data collected in 1994 showed that compared to the 6-year rotation, kidney bean cultivation in repeated monoculture resulted in a significant (P＜0.05) reduction in plant height, aboveground plant biomass, pod number, seed yield, and seed size. During the last l2-year period (1989-2000), the average seed yield of kidney bean was 970 kg/ha in monoculture, representing a 59% loss as compared to the average yield of 2380 kg/ha in the 6-year rotation. Greenhouse tests of soil samples collected in 1994 revealed that the incidence of Pythium damping-off of kidney bean and sugar beet was highest (＞66.1 %) in the soil from bean monoculture, modest in the soil from bare fallow, and lowest (＜38.9%) in the soil from bean in the 6-year rotation. Fusarium yellow of kidney bean was detected at high frequency (87%) only in the soil of bean monoculture. These results from testing of soil samples and examination of field plants suggest that the stunting and yellowing of kidney bean plants observed in monoculture plots were due to a root rot complex caused by Pythium spp. and Fusarium spp. Several isolates of Pseudomonas sp. from healthy bean rootlets of the rotation plots showed suppressive effects to the damping-off pathogens in this field. This study suggests that the soil testing method is useful for studying activities of soilborne pathogens and beneficial microorganisms in microplots where removal of plants is restricted.
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Claims 8
Claim · model-written summary
Repeated monoculture significantly reduced kidney bean height, aboveground biomass, pod number, seed yield and seed size relative to six-year rotation.
- Taxon
- kidney bean
Phaseolus vulgarise0 - Treatment
- repeated monoculturee0
- Outcome
- plant height, aboveground plant biomass, pod number, seed yield, and seed sizee0
- Direction
- reductione0
- Comparator
- 6-year rotatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compared to the 6-year rotation, kidney bean cultivation in repeated monoculture resulted in a significant (P＜0.05) reduction in plant height, aboveground plant biomass, pod number, seed yield, and seed size.”
Claim · model-written summary
Average kidney bean seed yield in monoculture was 970 kg/ha, a 59% loss against six-year rotation.
- Taxon
- kidney beanPhaseolus vulgarise0
- Treatment
- monoculturee0
- Outcome
- seed yielde0
- Direction
- losse0
- Value
- 970 kg/hae0
- Qualifier
- 59% losse0
- Comparator
- 6-year rotatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the average seed yield of kidney bean was 970 kg/ha in monoculture, representing a 59% loss as compared to the average yield of 2380 kg/ha in the 6-year rotation.”
Claim · model-written summary
Pythium damping-off incidence in kidney bean was highest in bean monoculture soil and lowest in six-year rotation soil.
- Taxon
- kidney beanPhaseolus vulgarise0
- Treatment
- 6-year rotatione0
- Outcome
- incidence of Pythium damping-offe0
- Direction
- loweste0
- Value
- ＜38.9%e0
- Comparator
- bean monoculturee0
.jpg?width=60){kind=small}
PythiumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“the incidence of Pythium damping-off of kidney bean and sugar beet was highest (＞66.1 %) in the soil from bean monoculture, modest in the soil from bare fallow, and lowest (＜38.9%) in the soil from bean in the 6-year rotation.”
Claim · model-written summary
Pythium damping-off incidence in sugar beet was highest in bean monoculture soil and lowest in six-year rotation soil.
- Taxon
- sugar beet
Beta vulgaris subsp. vulgarise0 - Treatment
- 6-year rotatione0
- Outcome
- incidence of Pythium damping-offe0
- Direction
- loweste0
- Value
- ＜38.9%e0
- Comparator
- bean monoculturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the incidence of Pythium damping-off of kidney bean and sugar beet was highest (＞66.1 %) in the soil from bean monoculture, modest in the soil from bare fallow, and lowest (＜38.9%) in the soil from bean in the 6-year rotation.”
Claim · model-written summary
Fusarium yellow of kidney bean was detected at 87% frequency only in bean monoculture soil.
- Taxon
- kidney beanPhaseolus vulgarise0
- Treatment
- bean monoculturee0
- Outcome
- Fusarium yellowe0
- Value
- 87%e0
FusariumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fusarium yellow of kidney bean was detected at high frequency (87%) only in the soil of bean monoculture.”
Claim · model-written summary
The authors attribute stunting and yellowing in monoculture kidney beans to Pythium and Fusarium root rot.
- Taxon
- kidney beanPhaseolus vulgarise0
- Outcome
- stunting and yellowinge0
- Qualifier
- root rot complexe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the stunting and yellowing of kidney bean plants observed in monoculture plots were due to a root rot complex caused by Pythium spp. and Fusarium spp.”
Claim · model-written summary
Pseudomonas isolates from healthy bean roots suppressed damping-off pathogens.
- Taxon
- beane0
- Treatment
- isolates of Pseudomonas sp.e0
- Interactor
- damping-off pathogense0pathogen
- Second interactor
- Pseudomonas sp.
Pseudomonase0biocontrol_agent - Outcome
- damping-off pathogense0
- Direction
- suppressivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Several isolates of Pseudomonas sp. from healthy bean rootlets of the rotation plots showed suppressive effects to the damping-off pathogens in this field.”
Claim · model-written summary
The soil testing method was judged useful for studying soilborne pathogen and beneficial microorganism activity in restricted microplots.
- Taxon
- Kidney BeanPhaseolus vulgarist0
- Outcome
- useful for studying activities of soilborne pathogens and beneficial microorganismse0
- Qualifier
- microplots where removal of plants is restrictede0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the soil testing method is useful for studying activities of soilborne pathogens and beneficial microorganisms in microplots where removal of plants is restricted.”
t0“Kidney Bean”
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See all 17 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.