Abstract
Improving the nutrient content of red soils in southern China is a priority for efficient rice production there. To assess the effectiveness of oilseed rape as green manure for the improvement of soil phosphorus nutrient supply and rice yield in red soil areas, a long-term field plot experiment was conducted comparing two species of rape, Brassica napus (BN) and Brassica juncea (BJ). The effects of returning oilseed rape on soil phosphorus availability, phosphorus absorption, and yield of subsequent rice under rice–green manure rotation mode were analyzed, using data from the seasons of 2020 to 2021. The study found that compared with winter fallow treatment (WT) and no-tillage treatment (NT), the soil available phosphorus content of BN was increased, and that of BJ was significantly increased. The content of water-soluble inorganic phosphorus of BJ increased, and that of BN increased substantially. Compared with the WT, the soil organic matter content and soil total phosphorus content of BN significantly increased, as did the soil available potassium content of BJ, and the soil total phosphorus content of BJ was significantly increased compared with NT. The soil particulate phosphorus content of BJ and BN was significantly increased by 14.00% and 16.00%, respectively. Compared with the WT, the phosphorus activation coefficient of BJ was significantly increased by 11.41%. The rice plant tiller number under the green manure returning treatment was significantly increased by 43.16% compared with the winter fallow treatment. The green manure returning measures increased rice grain yield by promoting rice tiller numbers; BN increased rice grain yield by 9.91% and BJ by 11.68%. Based on these results, returning oilseed rape green manure could augment the phosphorus nutrients of red soil and promote phosphorus availability. Rice–oilseed rape green manure rotation could increase rice grain yield.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. 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 16
Claim · model-written summary
Returning Brassica napus raised soil available phosphorus content relative to winter fallow and no-tillage treatments.
- Taxon
- Brassica napus
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napuse1 - Treatment
- BNe0
- Outcome
- soil available phosphorus contente0
- Direction
- increasede0
- Comparator
- winter fallow treatment (WT) and no-tillage treatment (NT)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“the soil available phosphorus content of BN was increased”
e1“Brassica napus (BN)”
e2“compared with winter fallow treatment (WT) and no-tillage treatment (NT)”
Claim · model-written summary
Returning Brassica juncea significantly raised soil available phosphorus content relative to winter fallow and no-tillage treatments.
- Taxon
- Brassica juncea
Brassica junceae1 - Treatment
- BJe0
- Outcome
- soil available phosphorus contente0
- Direction
- significantly increasede0
- Comparator
- winter fallow treatment (WT) and no-tillage treatment (NT)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the soil available phosphorus content of BN was increased, and that of BJ was significantly increased”
e1“Brassica juncea (BJ)”
e2“compared with winter fallow treatment (WT) and no-tillage treatment (NT)”
Claim · model-written summary
Returning Brassica juncea increased the soil content of water-soluble inorganic phosphorus.
- Taxon
- Brassica junceaBrassica junceae1
- Treatment
- BJe0
- Outcome
- content of water-soluble inorganic phosphoruse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The content of water-soluble inorganic phosphorus of BJ increased”
e1“Brassica juncea (BJ)”
Claim · model-written summary
Returning Brassica napus increased the soil content of water-soluble inorganic phosphorus substantially.
- Taxon
- Brassica napusBrassica napuse1
- Treatment
- BNe0
- Outcome
- content of water-soluble inorganic phosphoruse0
- Direction
- increased substantiallye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The content of water-soluble inorganic phosphorus of BJ increased, and that of BN increased substantially”
e1“Brassica napus (BN)”
Claim · model-written summary
Compared with winter fallow, Brassica napus significantly increased soil organic matter content and soil total phosphorus content.
- Taxon
- Brassica napusBrassica napuse1
- Treatment
- BNe0
- Outcome
- soil organic matter content and soil total phosphorus contente0
- Direction
- significantly increasede0
- Comparator
- WTe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with the WT, the soil organic matter content and soil total phosphorus content of BN significantly increased”
e1“Brassica napus (BN)”
Claim · model-written summary
Compared with winter fallow, Brassica juncea significantly increased soil available potassium content.
- Taxon
- Brassica junceaBrassica junceae1
- Treatment
- BJe0
- Outcome
- soil available potassium contente0
- Direction
- significantly increasede0
- Comparator
- WTe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with the WT, the soil organic matter content and soil total phosphorus content of BN significantly increased, as did the soil available potassium content of BJ”
e1“Brassica juncea (BJ)”
Claim · model-written summary
Brassica juncea significantly increased soil total phosphorus content relative to no-tillage.
- Taxon
- Brassica junceaBrassica junceae1
- Treatment
- BJe0
- Outcome
- soil total phosphorus contente0
- Direction
- significantly increasede0
- Comparator
- NTe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the soil total phosphorus content of BJ was significantly increased compared with NT”
e1“Brassica juncea (BJ)”
Claim · model-written summary
Brassica juncea significantly increased soil particulate phosphorus content by 14.00%.
- Taxon
- Brassica junceaBrassica junceae1
- Treatment
- BJe0
- Outcome
- soil particulate phosphorus contente0
- Direction
- significantly increasede0
- Value
- 14.00%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The soil particulate phosphorus content of BJ and BN was significantly increased by 14.00% and 16.00%, respectively”
e1“Brassica juncea (BJ)”
Claim · model-written summary
Brassica napus significantly increased soil particulate phosphorus content by 16.00%.
- Taxon
- Brassica napusBrassica napuse1
- Treatment
- BNe0
- Outcome
- soil particulate phosphorus contente0
- Direction
- significantly increasede0
- Value
- 16.00%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The soil particulate phosphorus content of BJ and BN was significantly increased by 14.00% and 16.00%, respectively”
e1“Brassica napus (BN)”
Claim · model-written summary
Compared with winter fallow, Brassica juncea significantly increased the soil phosphorus activation coefficient by 11.41%.
- Taxon
- Brassica junceaBrassica junceae1
- Treatment
- BJe0
- Outcome
- phosphorus activation coefficiente0
- Direction
- significantly increasede0
- Value
- 11.41%e0
- Comparator
- WTe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with the WT, the phosphorus activation coefficient of BJ was significantly increased by 11.41%”
e1“Brassica juncea (BJ)”
Claim · model-written summary
Rice tiller number under green manure returning was significantly increased by 43.16% relative to winter fallow.
- Taxon
- rice
Oryza sativae0 - Treatment
- green manure returning treatmente0
- Outcome
- tiller numbere0
- Direction
- significantly increasede0
- Value
- 43.16%e0
- Comparator
- winter fallow treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rice plant tiller number under the green manure returning treatment was significantly increased by 43.16% compared with the winter fallow treatment”
Claim · model-written summary
Brassica napus green manure increased rice grain yield by 9.91%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“BN increased rice grain yield by 9.91% and BJ by 11.68%”
Claim · model-written summary
Brassica juncea green manure increased rice grain yield by 11.68%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“BN increased rice grain yield by 9.91% and BJ by 11.68%”
Claim · model-written summary
The authors attribute the grain yield increase from green manure returning to promoted rice tiller numbers.
- Taxon
- riceOryza sativae0
- Treatment
- green manure returning measurese0
- Outcome
- rice grain yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The green manure returning measures increased rice grain yield by promoting rice tiller numbers”
Claim · model-written summary
The authors conclude that returning oilseed rape green manure could augment red-soil phosphorus nutrients and promote phosphorus availability.
- Taxon
- oilseed rapeBrassica napuse0
- Outcome
- augment the phosphorus nutrients of red soil and promote phosphorus availabilitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“returning oilseed rape green manure could augment the phosphorus nutrients of red soil and promote phosphorus availability”
Claim · model-written summary
The authors conclude that a rice-oilseed rape green manure rotation could increase rice grain yield.
- Taxon
- riceOryza sativae0
- Outcome
- increase rice grain yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“oilseed rape green manure rotation could increase rice grain yield”
The same questions in other papers
Brassica juncea · yield · Oryza sativa (rice)Results agree
6 papers in the same direction as this paper
- positive
- positive
- positive
3 papers more in this group
See all 7 papers →Brassica napus · yield · Oryza sativa (rice)Results agree
13 papers in the same direction as this paper
- positive
- positive
- positive
10 papers more in this group
See all 14 papers →fertilization · yield · Oryza sativa (rice)Positive and negative results
3,182 papers in the same direction as this paper · 207 in the opposite direction · 65 reporting no difference from an alternative
- positive
- no effect
- no effect
3,451 papers more in this group
See all 3,455 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.