Abstract
Soil nitrate accumulation was often occurred because of excessive nitrogen fertilization application which easily led to nitrate pollution of groundwater and vegetable.The aim of this study was to determine the variation of nitrate in soil and crops under the intercropped system between different rooting depth vegetables,to study the temporal and spatial variation of soil nitrate,in addition,to reveal the difference of vegetables nitrate content.We selected the radish(deeper root)and celery(shallow root),then intercropped them together.The results showed that whether in preceding growth time or the harvest,NO3--N content of 0～20 cm soil layer increased by this intercropping while,concentrations of lower layers decreased,which indicated that this intercropping could reduce nitrate leaching.Furthermore,0～40 cm NO3--N accumulation of intercropping was more than that of sole crop,on the countrary,40～100 cm NO3--N stored less than that of sole crop system.In the whole profile of 0～100 cm soil,NO3--N accumulation of the intercropping was less than that of sole radish and celery for 1.4% and 9.0%,respectively.This intercropping system has the trendency to reduce vegetable nitrate.It indicated that this intercropping has the yield advantage to some extent because that total nitrogen concentration and yield of intercropped radish evidently were higher than those of sole radish.Also,this intercropping can reduce the apparent N losses.Reasonable vegetable intercropping can increase nitrate holding ability and reduce nitrate leaching.Therefore,it has the positive effect on vegetable yield and quality.
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Claims 9
Claim · model-written summary
Intercropping increased topsoil nitrate.
- Taxon
- radish
Raphanus sativuse1 - Treatment
- this intercroppinge0
- Outcome
- NO3--N content of 0～20 cm soil layere0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NO3--N content of 0～20 cm soil layer increased by this intercropping”
e1“radish(deeper root)and celery(shallow root)”
Claim · model-written summary
Intercropping decreased nitrate concentration in lower soil layers.
- Taxon
- radishRaphanus sativuse1
- Treatment
- intercroppede1
- Outcome
- concentrations of lower layerse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“concentrations of lower layers decreased”
e1“radish(deeper root)and celery(shallow root),then intercropped them together”
Claim · model-written summary
Intercropping raised nitrate accumulation at 0 to 40 cm relative to sole cropping.
- Taxon
- radishRaphanus sativuse1
- Treatment
- intercroppinge0
- Outcome
- 0～40 cm NO3--N accumulatione0
- Direction
- more thane0
- Comparator
- sole crope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“0～40 cm NO3--N accumulation of intercropping was more than that of sole crop”
e1“radish(deeper root)and celery(shallow root)”
Claim · model-written summary
Intercropping reduced nitrate storage at 40 to 100 cm relative to sole cropping.
- Taxon
- radishRaphanus sativuse1
- Treatment
- intercroppinge2
- Outcome
- 40～100 cm NO3--N storede0
- Direction
- less thane0
- Comparator
- sole crop systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“40～100 cm NO3--N stored less than that of sole crop system”
e1“radish(deeper root)and celery(shallow root)”
e2“intercropping was more than that of sole crop”
Claim · model-written summary
Whole-profile nitrate accumulation was 1.4% less than sole radish.
- Taxon
- radishRaphanus sativuse0
- Treatment
- intercroppinge0
- Outcome
- NO3--N accumulatione0
- Direction
- less thane0
- Value
- 1.4%e0
- Comparator
- sole radishe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NO3--N accumulation of the intercropping was less than that of sole radish and celery for 1.4% and 9.0%,respectively”
Claim · model-written summary
Whole-profile nitrate accumulation was 9.0% less than sole celery.
- Taxon
- celery
%2C_Elswick%2C_Northumberland_4.jpg?width=60)
Apium graveolens Dulce Groupe0 - Treatment
- intercroppinge0
- Outcome
- NO3--N accumulatione0
- Direction
- less thane0
- Value
- 9.0%e0
- Comparator
- sole radish and celerye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
%2C_Elswick%2C_Northumberland_4.jpg?width=500)
Verbatim
e0“NO3--N accumulation of the intercropping was less than that of sole radish and celery for 1.4% and 9.0%,respectively”
Claim · model-written summary
Intercropping tended to reduce vegetable nitrate.
Not reportedComparator
Verbatim
e0“This intercropping system has the trendency to reduce vegetable nitrate”
Claim · model-written summary
Intercropped radish had higher total nitrogen concentration and yield than sole radish.
- Taxon
- radishRaphanus sativuse0
- Treatment
- intercroppede0
- Outcome
- total nitrogen concentration and yielde0
- Direction
- highere0
- Comparator
- sole radishe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total nitrogen concentration and yield of intercropped radish evidently were higher than those of sole radish”
Claim · model-written summary
Intercropping reduced apparent nitrogen losses.
- Taxon
- radishRaphanus sativuse1
- Treatment
- intercroppinge0
- Outcome
- apparent N lossese0
- Direction
- reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this intercropping can reduce the apparent N losses”
e1“radish(deeper root)and celery(shallow root)”
The same questions in other papers
intercropping · molecular: metabolites · Raphanus sativus (radish)Positive and negative results
2 in the opposite direction
- negative
- negative
intercropping · yield · Raphanus sativus (radish)Results agree
7 papers in the same direction as this paper
- positive
- positive
- positive
4 papers more in this group
See all 8 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.