Abstract
Straw amendment (SA) can be used to increase soil organic matter and decrease dioxide carbon emissions. However, the impact of SA on the crop yield is still subject to debate in different areas. In this study, soil temperature (ST), soil moisture (SM), soil bulk density, soil-available-nitrogen (AN), soil-available-phosphorus (AP), crop growth and yield were measured in SA and NSA (no straw amendment) at slope positions of a 130-m-long consecutive Mollisol slope during the maize (Zea mays) growth stages in the North Temperate Zone of China. Compared with NSA, the influence of SA on ST and SM was not consistent, while AN typically increased on the top slope. However, SA conventionally increased AP, increased daily ST and monthly ST (2.4–7.9%), and increased daily SM and monthly SM (2.1–12.5%) on the back slope. SA increased crop yield by 1–9.8% and 55.6–105.1% on the top and back slopes, respectively. At the bottom, SA conventionally decreased ST (0.20–1.48 °C in July and August), SM (3.5–29.6% from May to August), AN and AP, and decreased crop yield (4.1–30.6%). In conclusion, SA changed the equilibrium of ST and SM, influenced the dynamics of AN and AP on the consecutive slopes, and increased yield on both the top and back slopes but decreased yield at the bottom.
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Claims 10
Claim · model-written summary
Straw amendment increased available nitrogen at the top slope.
Not reportedTaxon
Verbatim
e0“AN typically increased on the top slope”
e1“Compared with NSA, the influence of SA on ST and SM was not consistent, while AN typically increased on the top slope”
t0“Crop Yield”
Claim · model-written summary
Straw amendment increased available phosphorus on the back slope.
Not reportedTaxonComparator
Verbatim
e0“SA conventionally increased AP”
e1“on the back slope”
t0“maize (Zea mays)”
Claim · model-written summary
Straw amendment raised daily and monthly soil temperature on the back slope by 2.4–7.9%.
Not reportedTaxonComparator
Verbatim
e0“increased daily ST and monthly ST (2.4–7.9%), and increased daily SM and monthly SM (2.1–12.5%) on the back slope”
e1“SA conventionally increased AP”
Claim · model-written summary
Straw amendment raised daily and monthly soil moisture on the back slope by 2.1–12.5%.
- Treatment
- SAe1
- Outcome
- daily SM and monthly SMe0
- Direction
- increasede0
- Value
- 2.1–12.5%e0
- Setting
- back slopee0
Not reportedTaxonComparator
Verbatim
e0“increased daily SM and monthly SM (2.1–12.5%) on the back slope”
e1“SA conventionally increased AP”
Claim · model-written summary
Straw amendment increased maize yield by 1–9.8% on the top slope.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SA increased crop yield by 1–9.8% and 55.6–105.1% on the top and back slopes, respectively”
e1“maize (Zea mays) growth stages”
Claim · model-written summary
Straw amendment increased maize yield by 55.6–105.1% on the back slope.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SA increased crop yield by 1–9.8% and 55.6–105.1% on the top and back slopes, respectively”
e1“maize (Zea mays) growth stages”
Claim · model-written summary
Straw amendment lowered bottom-slope soil temperature by 0.20–1.48 °C in July and August.
Not reportedTaxonComparator
Verbatim
e0“SA conventionally decreased ST (0.20–1.48 °C in July and August)”
Claim · model-written summary
Straw amendment lowered bottom-slope soil moisture by 3.5–29.6% from May to August.
Not reportedTaxonComparator
Verbatim
e0“SA conventionally decreased ST (0.20–1.48 °C in July and August), SM (3.5–29.6% from May to August)”
Claim · model-written summary
Straw amendment lowered available nitrogen and phosphorus at the bottom slope.
Not reportedTaxonComparator
Verbatim
e0“At the bottom, SA conventionally decreased ST (0.20–1.48 °C in July and August), SM (3.5–29.6% from May to August), AN and AP”
Claim · model-written summary
Straw amendment lowered maize yield at the bottom slope by 4.1–30.6%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreased crop yield (4.1–30.6%)”
e1“At the bottom, SA conventionally decreased ST”
e2“maize (Zea mays) growth stages”
The same questions in other papers
salicylic acid · yield · Zea mays (maize)Results differ
41 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- no effect
- positive
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See all 44 papers →salicylic acid · soil: chemistry · Zea mays (maize)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
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.