Abstract
Effects of nitrogen fertilizer types on the maize yield, variation of soil nitrate content in the 0-90 cmlayers with maize growing stages and nitrogen use efficiency(NUE) were carried out on a typical black soil in a fieldexperiment. The results showed that the 90 cm deep soil layer, soil residual nitrate was elevated by the applicationof nitrogen fertilizer by about 30%, but it decreased too with the growing stages of maize, and common urea re-mained 20% higher than that of control at harvest. Compared with common urea, soil nitrate content of controlled-re-lease nitrogen fertilizer decreased slowly in the early stage and fast in the lately stage, soil residual nitrate contentwas lower. Controlled-release compound fertilizer could meet the demand for maize growth earlier stage and laterstage of soil nitrate nitrogen, improve yield and maximize nitrogen fertilizer use efficiency to 55.41% and achievethe purpose of single fertilization. Yields and N use efficiency of sulfur coated urea fertilizer by single fertilizationwere the lowest. Compared with the other nitrogen treatments, there was a significant difference with those.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher.
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 7
Claim · model-written summary
Nitrogen fertilizer application elevated soil residual nitrate at 90 cm depth by about 30%.
- Treatment
- nitrogen fertilizere1
- Outcome
- soil residual nitratee1
- Direction
- elevatede1
- Value
- about 30%e1
- Qualifier
- 90 cm deep soil layere1
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Spring Maize Yield”
e1“the 90 cm deep soil layer, soil residual nitrate was elevated by the applicationof nitrogen fertilizer by about 30%, but it decreased too with the growing stages of maize, and common urea re-mained 20% higher than that of control at harvest”
Claim · model-written summary
Soil residual nitrate decreased with the growing stages of maize.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Spring Maize Yield”
e1“the 90 cm deep soil layer, soil residual nitrate was elevated by the applicationof nitrogen fertilizer by about 30%, but it decreased too with the growing stages of maize, and common urea re-mained 20% higher than that of control at harvest”
Claim · model-written summary
Common urea left soil residual nitrate 20% higher than the control at harvest.
- Treatment
- common ureae1
- Outcome
- soil residual nitratee1
- Direction
- highere1
- Value
- 20%e1
- Qualifier
- at harveste1
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Spring Maize Yield”
e1“the 90 cm deep soil layer, soil residual nitrate was elevated by the applicationof nitrogen fertilizer by about 30%, but it decreased too with the growing stages of maize, and common urea re-mained 20% higher than that of control at harvest”
Claim · model-written summary
Controlled-release compound fertilizer maximized nitrogen fertilizer use efficiency to 55.41%.
- Treatment
- Controlled-release compound fertilizere3
- Outcome
- nitrogen fertilizer use efficiencye3
- Direction
- maximizee3
- Value
- 55.41%e3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Spring Maize Yield”
e3“Controlled-release compound fertilizer could meet the demand for maize growth earlier stage and laterstage of soil nitrate nitrogen, improve yield and maximize nitrogen fertilizer use efficiency to 55.41%”
Claim · model-written summary
Controlled-release compound fertilizer improved maize yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Spring Maize Yield”
e3“Controlled-release compound fertilizer could meet the demand for maize growth earlier stage and laterstage of soil nitrate nitrogen, improve yield and maximize nitrogen fertilizer use efficiency to 55.41%”
Claim · model-written summary
Controlled-release compound fertilizer could meet the demand for maize growth at early and late stages.
- Treatment
- Controlled-release compound fertilizere3
- Outcome
- demand for maize growthe3
- Direction
- could meete3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Spring Maize Yield”
e3“Controlled-release compound fertilizer could meet the demand for maize growth earlier stage and laterstage of soil nitrate nitrogen, improve yield and maximize nitrogen fertilizer use efficiency to 55.41%”
Claim · model-written summary
Yields and N use efficiency of sulfur coated urea fertilizer applied as a single fertilization were the lowest.
- Treatment
- sulfur coated urea fertilizere4
- Outcome
- Yields and N use efficiencye4
- Direction
- the loweste4
- Qualifier
- by single fertilizatione4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Spring Maize Yield”
e4“Yields and N use efficiency of sulfur coated urea fertilizer by single fertilization were the lowest”
The same questions in other papers
sulfur atom · yield · Zea mays (maize)Results differ
12 papers in the same direction as this paper · 69 in the opposite direction
- positive
- positive
- positive
78 papers more in this group
See all 82 papers →fertilization · nutrient: efficiency · Zea mays (maize)Results differ
173 papers in the same direction as this paper · 12 in the opposite direction · 3 reporting no difference from an alternative
- no effect
- negative
- negative
185 papers more in this group
See all 189 papers →nitrogen · nutrient: content · Zea mays (maize)Positive and negative results
85 papers in the same direction as this paper · 403 in the opposite direction
- positive
- positive
- positive
485 papers more in this group
See all 489 papers →fertilization · nutrient: content · Zea mays (maize)Positive and negative results
137 papers in the same direction as this paper · 1,026 in the opposite direction
- positive
- positive
- positive
1,160 papers more in this group
See all 1,164 papers →fertilization · growth · Zea mays (maize)Positive and negative results
1,195 papers in the same direction as this paper · 149 in the opposite direction · 20 reporting no difference from an alternative
- no effect
- no effect
- negative
1,361 papers more in this group
See all 1,365 papers →nitrogen · yield · Zea mays (maize)Positive and negative results
278 papers in the same direction as this paper · 1,906 in the opposite direction
- positive
- positive
- positive
2,181 papers more in this group
See all 2,185 papers →fertilization · yield · Zea mays (maize)Positive and negative results
3,484 papers in the same direction as this paper · 338 in the opposite direction · 85 reporting no difference from an alternative
- negative
- no effect
- negative
3,904 papers more in this group
See all 3,908 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.