Abstract
Field experiment was carried out to study the effect of nitrogen forms on maize yield,extractable organic matter and nitrogen content of rhizosphere and non rhizosphere soil.The results showed:Grain yield and N content of maize under different N forms treatments were significantly higher than those of no N treatment.Under the same N application rate( N 190 kg/hm2),NO-3-N and urea treatments increased maize yield and N content absorbed before anthesis comparing with NH+4-N treatment,although the increment was not significant.The nitrogen forms had no significant effect on soil NO-3-N,NH+4-N,EOC and EON content.EOC content was highest during flowering,coincident with root growth,while EON was highest during seedling.The results suggested that under high fertility soil,different nitrogen forms had no significant effects on maize yield and soil nitrogen condition.
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Claims 8
Claim · model-written summary
Nitrogen forms significantly increased maize grain yield over no nitrogen.
- Treatment
- different N forms treatmentse0
- Outcome
- Grain yielde0
- Direction
- highere0
- Comparator
- no N treatmente0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield and N content of maize under different N forms treatments were significantly higher than those of no N treatment”
Claim · model-written summary
Nitrogen forms significantly increased maize nitrogen content over no nitrogen.
- Treatment
- different N forms treatmentse0
- Outcome
- N contente0
- Direction
- highere0
- Comparator
- no N treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield and N content of maize under different N forms treatments were significantly higher than those of no N treatment”
Claim · model-written summary
Nitrate and urea increased maize yield relative to ammonium at the same rate, without significance.
- Treatment
- NO-3-N and urea treatmentse0
- Outcome
- maize yielde0
- Direction
- increasede0
- Qualifier
- N 190 kg/hm2e0
- Comparator
- NH+4-N treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under the same N application rate( N 190 kg/hm2),NO-3-N and urea treatments increased maize yield and N content absorbed before anthesis comparing with NH+4-N treatment,although the increment was not significant”
Claim · model-written summary
Nitrate and urea increased pre-anthesis maize nitrogen content relative to ammonium, without significance.
- Treatment
- NO-3-N and urea treatmentse0
- Outcome
- N content absorbed before anthesise0
- Direction
- increasede0
- Qualifier
- N 190 kg/hm2e0
- Comparator
- NH+4-N treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under the same N application rate( N 190 kg/hm2),NO-3-N and urea treatments increased maize yield and N content absorbed before anthesis comparing with NH+4-N treatment,although the increment was not significant”
Claim · model-written summary
Nitrogen forms had no significant effect on soil nitrate and ammonium content.
Not reportedTaxonComparator
Verbatim
e0“The nitrogen forms had no significant effect on soil NO-3-N,NH+4-N,EOC and EON content”
Claim · model-written summary
Nitrogen forms had no significant effect on soil EOC and EON content.
Not reportedTaxonComparator
Verbatim
e0“The nitrogen forms had no significant effect on soil NO-3-N,NH+4-N,EOC and EON content”
Claim · model-written summary
Soil EOC content was highest during flowering.
Not reportedTaxon
Verbatim
e0“EOC content was highest during flowering,coincident with root growth”
Claim · model-written summary
Soil EON content was highest during seedling stage.
Not reportedTaxon
Verbatim
e0“EON was highest during seedling”
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