Abstract
The rapeseed undersowing rice cultivation model is effective for double cropping rice in winter fallow field in southern area of China. The symbiosis time of rice and rapeseed as well as seeding amount are key factors to affect the yield of rapeseed undersowing rice.To explore the growth and yield affected by different symbiosis times and various seeding amounts, we designed a split-plot experiment with two factors.The results showed that:(1) the rapeseed density decreased with the delay of growth period, and the rapeseed undersowing rice was favorable for improving the density at the seedling stage, but the density at the other growth stages decreased with extension of symbiosis;(2) symbiosis time and seeding amount had a significant effect on rapeseed density at each growth period, moreover,there was significant positive interaction effect at emergence stage, the density at maturity period in two experiment at locations reached the maximum when symbiosis time was 10 days and the seeding at 9.0 kg ha–1;(3) the symbiosis time and seeding amount influenced the growth and development at each period, leaf area index increased when symbiosis time delayed, which led to weak and thin seedlings, therefore, resulting in the changes of yield component,yield per plant as well as plot yield. In conclusion, the rapeseed undersowing rice cultivation model can significantly in-crease the rapeseed yield, and suggest a favorable condition of 10 days symbiosis and seeding at 9.0 kg ha–1 for getting higher yield.
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Claims 12
Claim · model-written summary
Rapeseed density decreased as growth progressed.
Verbatim
e0“the rapeseed density decreased with the delay of growth period”
Claim · model-written summary
Undersowing rice improved rapeseed seedling density.
- Taxon
- rapeseede0
- Treatment
- undersowing ricee0
- Outcome
- density at the seedling stagee0
- Direction
- improvinge0
Not reportedComparator
Verbatim
e0“the rapeseed undersowing rice was favorable for improving the density at the seedling stage”
Claim · model-written summary
Longer symbiosis reduced rapeseed density at other growth stages.
Verbatim
e0“the density at the other growth stages decreased with extension of symbiosis”
e1“the rapeseed density decreased”
Claim · model-written summary
Symbiosis time significantly affected rapeseed density at each growth period.
Not reportedDirection
Verbatim
e0“symbiosis time and seeding amount had a significant effect on rapeseed density at each growth period”
Claim · model-written summary
Seeding amount significantly affected rapeseed density at each growth period.
Not reportedDirection
Verbatim
e0“symbiosis time and seeding amount had a significant effect on rapeseed density at each growth period”
Claim · model-written summary
Symbiosis time and seeding amount had a significant positive interaction at emergence.
Verbatim
e0“there was significant positive interaction effect at emergence stage”
e1“symbiosis time and seeding amount had a significant effect”
e2“the rapeseed density decreased”
Claim · model-written summary
Maturity density was highest at 10 days symbiosis and 9.0 kg ha–1 seeding.
Verbatim
e0“the density at maturity period in two experiment at locations reached the maximum when symbiosis time was 10 days and the seeding at 9.0 kg ha–1”
e1“the rapeseed density decreased”
Claim · model-written summary
Leaf area index rose with later symbiosis time.
Verbatim
e0“leaf area index increased when symbiosis time delayed”
e1“the rapeseed density decreased”
Claim · model-written summary
Later symbiosis time led to weak, thin seedlings.
Verbatim
e0“leaf area index increased when symbiosis time delayed, which led to weak and thin seedlings”
e1“the rapeseed density decreased”
Claim · model-written summary
Symbiosis time and seeding amount changed yield components, yield per plant and plot yield.
- Taxon
- rapeseede1
- Treatment
- symbiosis time and seeding amounte0
- Outcome
- yield component,yield per plant as well as plot yielde0
Not reportedDirection
Verbatim
e0“the symbiosis time and seeding amount influenced the growth and development at each period, leaf area index increased when symbiosis time delayed, which led to weak and thin seedlings, therefore, resulting in the changes of yield component,yield per plant as well as plot yield”
e1“the rapeseed density decreased”
Claim · model-written summary
Rapeseed undersowing rice significantly increased rapeseed yield.
- Taxon
- rapeseede0
- Treatment
- undersowing rice cultivation modele0
- Outcome
- rapeseed yielde0
- Direction
- in-creasee0
Not reportedComparator
Verbatim
e0“the rapeseed undersowing rice cultivation model can significantly in-crease the rapeseed yield”
Claim · model-written summary
The authors recommend 10 days symbiosis and 9.0 kg ha–1 seeding for higher yield.
Verbatim
e0“suggest a favorable condition of 10 days symbiosis and seeding at 9.0 kg ha–1 for getting higher yield”
e1“rapeseed yield”
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