Abstract
Abstract: The allelopathic effect of decomposed litter from trees interplanted with crops is a key problem in the intercrop agroforestry business that could influence the economic benefits and sustainable development of ecoagriculture. In our study, the litter from 12 common intercropped tree species was collected from the Guanzhong Plain (Shaanxi Province, China) and mixed with soil, incubated to allow decomposition for 120 days, and then extracted using water. The water extracts at different concentrations were used for fi??lter paper-dish cultivation of rape (Brassica napus) seeds. Indicators of the germination and growth of seedlings were measured to investigate the allelopathic effects of decomposed litter on rape. The results showed that in rape the most sensitive indicators of harmful allelochemicals derived from decomposed litter were the germination speed index and catalase activity of seedlings. Moreover, extracts of decomposed medium (soil) containing litter from Paulownia fortunei, Acer truncatum, Zanthoxylum bungeanum, Juglans regia, Diospyros kaki, Prunus persica, Prunus armeniaca, and Ziziphus jujube were beneficial to the germination and seedling growth of rape at all concentrations examined, and thus these trees could be safely interplanted with rape. Extracts from Eucommia ulmoides, Populus canadensis, and Malus pumila inhibited the germination and seedling growth of rape, and thus the use of these trees in intercropping should be reduced. Extracts from Pyrus bretschneideri showed growth promotion at lower concentrations (10 and 20 mg mL-1) but were growth inhibitive at a high concentration (40 mg mL-1); thus, it could be intercropped with rape but at a low density.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
Germination speed index and seedling catalase activity were the most sensitive indicators of harmful allelochemicals in rape.
- Taxon
- rape
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napuse0 - Outcome
- germination speed index and catalase activity of seedlingse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“in rape the most sensitive indicators of harmful allelochemicals derived from decomposed litter were the germination speed index and catalase activity of seedlings”
Claim · model-written summary
Extracts from eight listed tree species benefited rape germination and seedling growth at all tested concentrations.
- Taxon
- rapeBrassica napuse0
- Treatment
- extracts of decomposed medium (soil) containing litter from Paulownia fortunei, Acer truncatum, Zanthoxylum bungeanum, Juglans regia, Diospyros kaki, Prunus persica, Prunus armeniaca, and Ziziphus jujubee0
- Outcome
- germination and seedling growth of rapee0
- Direction
- beneficiale0
- Qualifier
- at all concentrations examinede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“extracts of decomposed medium (soil) containing litter from Paulownia fortunei, Acer truncatum, Zanthoxylum bungeanum, Juglans regia, Diospyros kaki, Prunus persica, Prunus armeniaca, and Ziziphus jujube were beneficial to the germination and seedling growth of rape at all concentrations examined”
Claim · model-written summary
Extracts from three tree species inhibited rape germination and seedling growth.
- Taxon
- rapeBrassica napuse0
- Treatment
- Extracts from Eucommia ulmoides, Populus canadensis, and Malus pumilae0
- Outcome
- germination and seedling growth of rapee0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Extracts from Eucommia ulmoides, Populus canadensis, and Malus pumila inhibited the germination and seedling growth of rape”
Claim · model-written summary
Pyrus bretschneideri extracts promoted rape growth at 10 and 20 mg mL-1.
- Taxon
- rapeBrassica napust0
- Treatment
- Extracts from Pyrus bretschneiderie0
- Outcome
- growth promotione0
- Direction
- promotione0
- Value
- 10 and 20 mg mL-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Extracts from Pyrus bretschneideri showed growth promotion at lower concentrations (10 and 20 mg mL-1)”
t0“on rape”
Claim · model-written summary
Pyrus bretschneideri extracts inhibited rape growth at 40 mg mL-1.
- Taxon
- rapeBrassica napust0
- Treatment
- Extracts from Pyrus bretschneiderie0
- Outcome
- growthe0
- Direction
- inhibitivee0
- Value
- 40 mg mL-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Extracts from Pyrus bretschneideri showed growth promotion at lower concentrations (10 and 20 mg mL-1) but were growth inhibitive at a high concentration (40 mg mL-1)”
t0“on rape”
Claim · model-written summary
The authors recommend intercropping Pyrus bretschneideri with rape at low density.
- Taxon
- rapeBrassica napuse0
- Outcome
- intercropped with rape but at a low densitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it could be intercropped with rape but at a low density”
The same questions in other papers
pruning · growth · Brassica napus (oilseed rape)Positive and negative results
1 paper in the same direction as this paper · 7 in the opposite direction
- no effect
- negative
- negative
5 papers more in this group
See all 9 papers →in vitro · growth · Brassica napus (oilseed rape)Positive and negative results
29 papers in the same direction as this paper · 7 in the opposite direction
- negative
- negative
- negative
33 papers more in this group
See all 37 papers →botanical · growth · Brassica napus (oilseed rape)Positive and negative results
21 papers in the same direction as this paper · 43 in the opposite direction
- negative
- negative
- negative
61 papers more in this group
See all 65 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.