Abstract
To analyze and compare the differences of maize yields,nutrient absorptions and soil nutrients of the cultivated layers between the intercropping systems,wheat/maize/soybean and wheat/maize/sweet potato,a three-year field experiment designed with single-factor at random was conducted in two main maize producing areas in Sichuan,Shehong in the middle and Ya'an in the west.The results show that after one-year planting in the intercropping systems,the maize yields of the wheat/maize/soybean are higher than those of the wheat/maize/sweet potato;however,the differences are not significant.After two or three-year's strip rotation,the maize yields of the wheat/maize/soybean are considerably higher than those of the wheat/maize/sweet potato.The two year's productions are more than those of the previous year with 679.5 kg/ha and 839.1 kg/ha on average and with the increases of 9.4% and 12.6% in the two study areas,which reflects a more significant productivity in Shehong than that in Ya'an.In general,the uptakes and accumulations of nitrogen of maize are insignificant in the two intercropping systems after the strip rotation before the jointing stage of maize;however,they are significantly higher in the wheat/maize/soybean after the jointing stage of maize.The uptakes and accumulations of phosphorus in the wheat/maize/soybean are lower than those in the wheat/maize/sweet potato significantly,while,the uptakes and accumulations of potassium in the wheat/maize/soybean are higher than those in the wheat/maize/sweet potato from the jointing stage to the flowering stage.The contents of soil nutrients in different crop strips are varied greatly.The residuals of nitrate nitrogen,available nitrogen and available potassium in the soybean strip are higher than those in the sweet potato strip,with increases of 18.4%,24.1% and 6.0%;however,the residuals of ammonium nitrogen and available phosphorus in the sweet potato strip are higher than those in the soybean strip,with increases of 18.9% and 17.1%.The contents of soil nutrients in the maize strip are insignificant after two and three-year's strip rotation,and the differences of soil nutrients in cultivated soil layers become small,which indicates that maize can balance the field nutrients better by the strip rotation.
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 15
Claim · model-written summary
After one year, maize yield in the soybean system was higher than in the sweet potato system without a significant difference.
- Treatment
- wheat/maize/soybeane0
- Outcome
- maize yieldse0
- Direction
- highere0
- Comparator
- wheat/maize/sweet potatoe0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“after one-year planting in the intercropping systems,the maize yields of the wheat/maize/soybean are higher than those of the wheat/maize/sweet potato;however,the differences are not significant”
Claim · model-written summary
After two or three years of strip rotation, maize yield was higher in the soybean system.
- Treatment
- wheat/maize/soybeane0
- Outcome
- maize yieldse0
- Direction
- highere0
- Qualifier
- two or three-year's strip rotatione0
- Comparator
- wheat/maize/sweet potatoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After two or three-year's strip rotation,the maize yields of the wheat/maize/soybean are considerably higher than those of the wheat/maize/sweet potato”
Claim · model-written summary
In Shehong, second-year maize production exceeded the previous year by 679.5 kg/ha, or 9.4%.
- Outcome
- productionse0
- Direction
- more thane0
- Value
- 679.5 kg/hae0
- Qualifier
- 9.4%e0
- Comparator
- previous yeare0
- Setting
- Shehonge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The two year's productions are more than those of the previous year with 679.5 kg/ha and 839.1 kg/ha on average and with the increases of 9.4% and 12.6% in the two study areas,which reflects a more significant productivity in Shehong than that in Ya'an”
t0“yield and differences of nutrient absorptions of maize”
Claim · model-written summary
In Ya’an, second-year maize production exceeded the previous year by 839.1 kg/ha, or 12.6%.
- Outcome
- productionse0
- Direction
- more thane0
- Value
- 839.1 kg/hae0
- Qualifier
- 12.6%e0
- Comparator
- previous yeare0
- Setting
- Ya'ane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The two year's productions are more than those of the previous year with 679.5 kg/ha and 839.1 kg/ha on average and with the increases of 9.4% and 12.6% in the two study areas,which reflects a more significant productivity in Shehong than that in Ya'an”
t0“yield and differences of nutrient absorptions of maize”
Claim · model-written summary
Before jointing, maize nitrogen uptake and accumulation did not differ significantly between systems.
- Treatment
- two intercropping systemse0
- Outcome
- uptakes and accumulations of nitrogen of maizee0
- Qualifier
- before the jointing stage of maizee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the uptakes and accumulations of nitrogen of maize are insignificant in the two intercropping systems after the strip rotation before the jointing stage of maize”
Claim · model-written summary
After jointing, maize nitrogen uptake and accumulation were significantly higher in the soybean system.
- Treatment
- wheat/maize/soybeane0
- Outcome
- theye0
- Direction
- highere0
- Qualifier
- after the jointing stage of maizee0
- Comparator
- wheat/maize/sweet potatot0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“they are significantly higher in the wheat/maize/soybean after the jointing stage of maize”
t0“maize in wheat/maize/soybean and wheat/maize/sweet potato”
Claim · model-written summary
Maize phosphorus uptake and accumulation were significantly lower in the soybean system.
- Treatment
- wheat/maize/soybeane0
- Outcome
- uptakes and accumulations of phosphoruse0
- Direction
- lowere0
- Comparator
- wheat/maize/sweet potatoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The uptakes and accumulations of phosphorus in the wheat/maize/soybean are lower than those in the wheat/maize/sweet potato significantly”
t0“yield and differences of nutrient absorptions of maize”
Claim · model-written summary
From jointing to flowering, maize potassium uptake and accumulation were higher in the soybean system.
- Treatment
- wheat/maize/soybeane0
- Outcome
- uptakes and accumulations of potassiume0
- Direction
- highere0
- Qualifier
- from the jointing stage to the flowering stagee0
- Comparator
- wheat/maize/sweet potatoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the uptakes and accumulations of potassium in the wheat/maize/soybean are higher than those in the wheat/maize/sweet potato from the jointing stage to the flowering stage”
t0“yield and differences of nutrient absorptions of maize”
Claim · model-written summary
Soil nitrate nitrogen residue was 18.4% higher in the soybean strip than the sweet potato strip.
- Outcome
- residuals of nitrate nitrogene0
- Direction
- highere0
- Value
- 18.4%e0
- Comparator
- sweet potato stripe0
- Setting
- soybean stripe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The residuals of nitrate nitrogen,available nitrogen and available potassium in the soybean strip are higher than those in the sweet potato strip,with increases of 18.4%,24.1% and 6.0%”
t0“yield and differences of nutrient absorptions of maize”
Claim · model-written summary
Soil available nitrogen residue was 24.1% higher in the soybean strip.
- Outcome
- available nitrogene0
- Direction
- highere0
- Value
- 24.1%e0
- Comparator
- sweet potato stripe0
- Setting
- soybean stripe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The residuals of nitrate nitrogen,available nitrogen and available potassium in the soybean strip are higher than those in the sweet potato strip,with increases of 18.4%,24.1% and 6.0%”
t0“yield and differences of nutrient absorptions of maize”
Claim · model-written summary
Soil available potassium residue was 6.0% higher in the soybean strip.
- Outcome
- available potassiume0
- Direction
- highere0
- Value
- 6.0%e0
- Comparator
- sweet potato stripe0
- Setting
- soybean stripe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The residuals of nitrate nitrogen,available nitrogen and available potassium in the soybean strip are higher than those in the sweet potato strip,with increases of 18.4%,24.1% and 6.0%”
t0“yield and differences of nutrient absorptions of maize”
Claim · model-written summary
Soil ammonium nitrogen residue was 18.9% higher in the sweet potato strip.
- Outcome
- residuals of ammonium nitrogene0
- Direction
- highere0
- Value
- 18.9%e0
- Comparator
- soybean stripe0
- Setting
- sweet potato stripe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the residuals of ammonium nitrogen and available phosphorus in the sweet potato strip are higher than those in the soybean strip,with increases of 18.9% and 17.1%”
t0“yield and differences of nutrient absorptions of maize”
Claim · model-written summary
Soil available phosphorus residue was 17.1% higher in the sweet potato strip.
- Outcome
- available phosphoruse0
- Direction
- highere0
- Value
- 17.1%e0
- Comparator
- soybean stripe0
- Setting
- sweet potato stripe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the residuals of ammonium nitrogen and available phosphorus in the sweet potato strip are higher than those in the soybean strip,with increases of 18.9% and 17.1%”
t0“yield and differences of nutrient absorptions of maize”
Claim · model-written summary
Maize-strip soil nutrient contents showed insignificant differences after two and three years of rotation.
- Outcome
- contents of soil nutrientse0
- Qualifier
- after two and three-year's strip rotatione0
- Setting
- maize stripe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The contents of soil nutrients in the maize strip are insignificant after two and three-year's strip rotation”
t0“yield and differences of nutrient absorptions of maize”
Claim · model-written summary
The authors inferred that maize strip rotation better balances field nutrients.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maize can balance the field nutrients better by the strip rotation”
The same questions in other papers
Triticum aestivum · yield · Zea mays (maize)Positive and negative results
82 papers in the same direction as this paper · 18 in the opposite direction · 1 reporting no difference from an alternative
- negative
- negative
- negative
98 papers more in this group
See all 102 papers →Glycine max · yield · Zea mays (maize)Positive and negative results
154 papers in the same direction as this paper · 18 in the opposite direction · 7 reporting no difference from an alternative
- positive
- no effect
- no effect
176 papers more in this group
See all 180 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.