Abstract
Field experiments on two soil fertility conditions were carried out to study the influence of nitrogen rates on nitrate content and nutrient quality of Chinese cabbage.The results showed that a significant quadratic regression existed between nitrogen rates and yield of Chinese cabbage on two soil fertility conditions.The yield of Chinese cabbage on medium and low soil fertility was increased by 141.2%～309.4%and 149.5%～617.6%,respectively.On low soil fertility the yield of Chinese cabbage was only 28.6%～49.5% of that on medium soil fertility.The nitrate content was increased by 9.9%～33.3%(on medium soil fertility,except N 75 kg·hm-2 treatment) and 240.3%～363.6%(on low soil fertility) respectively by applying nitrogen(N) 75～300 kg·hm-2.In the same treatment,nitrate content of Chinese cabbage was higher on medium soil fertility than on low soil fertility except(N) 150 kg·hm-2 treatment.On medium soil fertility Vc content in Chinese cabbage was decreased,the content of amino acid was increased and the content of soluble sugar was affected little with applying nitrogen(N) fertilizer.But the content of Vc,soluble sugar and amino acid was decreased on low soil fertility.
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Claims 11
Claim · model-written summary
Nitrogen rate and Chinese cabbage yield had a significant quadratic relation on both soil fertility levels.
- Taxon
- Chinese cabbage
Brassica rapa subsp. pekinensise0 - Treatment
- nitrogen ratese0
- Outcome
- yielde0
- Qualifier
- two soil fertility conditionse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a significant quadratic regression existed between nitrogen rates and yield of Chinese cabbage on two soil fertility conditions”
Claim · model-written summary
On medium fertility soil, nitrogen increased Chinese cabbage yield by 141.2%～309.4%.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- applying nitrogen(N) 75～300 kg·hm-2e1
- Outcome
- yield of Chinese cabbagee0
- Direction
- increasede0
- Value
- 141.2%～309.4%e0
- Qualifier
- mediume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Chinese cabbage”
e0“The yield of Chinese cabbage on medium and low soil fertility was increased by 141.2%～309.4%and 149.5%～617.6%,respectively”
e1“applying nitrogen(N) 75～300 kg·hm-2”
Claim · model-written summary
On low fertility soil, nitrogen increased Chinese cabbage yield by 149.5%～617.6%.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- applying nitrogen(N) 75～300 kg·hm-2e1
- Outcome
- yield of Chinese cabbagee0
- Direction
- increasede0
- Value
- 149.5%～617.6%e0
- Qualifier
- low soil fertilitye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Chinese cabbage”
e0“The yield of Chinese cabbage on medium and low soil fertility was increased by 141.2%～309.4%and 149.5%～617.6%,respectively”
e1“applying nitrogen(N) 75～300 kg·hm-2”
Claim · model-written summary
Yield on low fertility soil was 28.6%～49.5% of yield on medium fertility soil.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensise0
- Outcome
- yield of Chinese cabbagee0
- Direction
- onlye0
- Value
- 28.6%～49.5%e0
- Qualifier
- low soil fertilitye0
- Comparator
- medium soil fertilitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On low soil fertility the yield of Chinese cabbage was only 28.6%～49.5% of that on medium soil fertility”
Claim · model-written summary
Nitrogen raised cabbage nitrate content by 9.9%～33.3% on medium fertility soil, except the 75 kg treatment.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- applying nitrogen(N) 75～300 kg·hm-2e0
- Outcome
- nitrate contente0
- Direction
- increasede0
- Value
- 9.9%～33.3%e0
- Qualifier
- on medium soil fertility,except N 75 kg·hm-2 treatmente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Chinese cabbage”
e0“The nitrate content was increased by 9.9%～33.3%(on medium soil fertility,except N 75 kg·hm-2 treatment) and 240.3%～363.6%(on low soil fertility) respectively by applying nitrogen(N) 75～300 kg·hm-2”
Claim · model-written summary
Nitrogen raised cabbage nitrate content by 240.3%～363.6% on low fertility soil.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- applying nitrogen(N) 75～300 kg·hm-2e0
- Outcome
- nitrate contente0
- Direction
- increasede0
- Value
- 240.3%～363.6%e0
- Qualifier
- on low soil fertilitye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Chinese cabbage”
e0“The nitrate content was increased by 9.9%～33.3%(on medium soil fertility,except N 75 kg·hm-2 treatment) and 240.3%～363.6%(on low soil fertility) respectively by applying nitrogen(N) 75～300 kg·hm-2”
Claim · model-written summary
Cabbage nitrate content was higher on medium than low fertility soil at the same nitrogen rate except 150 kg.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensise0
- Outcome
- nitrate contente0
- Direction
- highere0
- Qualifier
- except(N) 150 kg·hm-2 treatmente0
- Comparator
- low soil fertilitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the same treatment,nitrate content of Chinese cabbage was higher on medium soil fertility than on low soil fertility except(N) 150 kg·hm-2 treatment”
Claim · model-written summary
On medium fertility soil, nitrogen decreased cabbage Vc content.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- applying nitrogen(N) fertilizere0
- Outcome
- Vc contente0
- Direction
- decreasede0
- Qualifier
- medium soil fertilitye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Chinese cabbage”
e0“On medium soil fertility Vc content in Chinese cabbage was decreased,the content of amino acid was increased and the content of soluble sugar was affected little with applying nitrogen(N) fertilizer”
Claim · model-written summary
On medium fertility soil, nitrogen increased cabbage amino acid content.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- applying nitrogen(N) fertilizere0
- Outcome
- content of amino acide0
- Direction
- increasede0
- Qualifier
- medium soil fertilitye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Chinese cabbage”
e0“On medium soil fertility Vc content in Chinese cabbage was decreased,the content of amino acid was increased and the content of soluble sugar was affected little with applying nitrogen(N) fertilizer”
Claim · model-written summary
On medium fertility soil, nitrogen affected soluble sugar content little.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- applying nitrogen(N) fertilizere0
- Outcome
- content of soluble sugare0
- Direction
- affected littlee0
- Qualifier
- medium soil fertilitye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Chinese cabbage”
e0“On medium soil fertility Vc content in Chinese cabbage was decreased,the content of amino acid was increased and the content of soluble sugar was affected little with applying nitrogen(N) fertilizer”
Claim · model-written summary
On low fertility soil, nitrogen decreased cabbage Vc, soluble sugar and amino acid contents.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- applying nitrogen(N) fertilizere1
- Outcome
- content of Vc,soluble sugar and amino acide0
- Direction
- decreasede0
- Qualifier
- low soil fertilitye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Chinese cabbage”
e0“But the content of Vc,soluble sugar and amino acid was decreased on low soil fertility”
e1“applying nitrogen(N) fertilizer”
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