Abstract
Abstract To study the effects of local nitrogen supply on water and nutrient absorption, French bean ( Phaseolus vulgaris L.) plants were grown in a split root system. Five treatments supplied with different nitrogen forms were compared: homogeneous nitrate (NN) and homogenous ammonium (AA) supply, spatially separated supply of nitrate and ammonium (NA), half of the root system supplied with N‐free nutrient solution, the other half with either nitrate (N0) or ammonium (A0). The results showed that 10 d after onset of treatments, root dry matter (DM) in the nitrate‐supplied vessels treated with NA was more than two times higher than that in the ammonium‐supplied vessels. Water uptake from the nitrate‐supplied vessels treated with NA was 281% higher than under ammonium supply. In treatments N0 and A0, the local supply of N resulted in clearly higher root DM, and water uptake from the nitrate‐supplied vessels was 82% higher than in the ‐N vessels. However, in A0 plants, water uptake from the ‐N nutrient solution was 129% higher than from the ammonium‐supplied vessels. This indicates a compensatory effect, which resulted in almost identical rates of total water uptake of treatments AA and A0, which had comparable shoot DM and leaf area. Ammonium supply reduced potassium and magnesium absorption. Water uptake was positively correlated with N, Mg and K uptake.
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Claims 10
Claim · model-written summary
Root dry matter in the nitrate-supplied vessels treated with NA was more than twice that in ammonium-supplied vessels, 10 days after treatment onset.
- Taxon
- French bean
Phaseolus vulgarise0 - Organ / stage
- roote1
- Treatment
- NAe1
- Outcome
- root dry matter (DM)e1
- Direction
- highere1
- Value
- more than two timese1
- Qualifier
- 10 d after onset of treatmentse1
- Comparator
- ammoniume1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To study the effects of local nitrogen supply on water and nutrient absorption, French bean ( Phaseolus vulgaris L.) plants were grown in a split root system”
e1“The results showed that 10 d after onset of treatments, root dry matter (DM) in the nitrate‐supplied vessels treated with NA was more than two times higher than that in the ammonium‐supplied vessels”
Claim · model-written summary
Water uptake from the nitrate-supplied vessels treated with NA was 281% higher than under ammonium supply.
- Taxon
- French beanPhaseolus vulgarise0
- Treatment
- NAe2
- Outcome
- Water uptakee2
- Direction
- highere2
- Value
- 281%e2
- Comparator
- ammoniume2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To study the effects of local nitrogen supply on water and nutrient absorption, French bean ( Phaseolus vulgaris L.) plants were grown in a split root system”
e2“Water uptake from the nitrate‐supplied vessels treated with NA was 281% higher than under ammonium supply”
Claim · model-written summary
The local supply of N in N0 and A0 treatments resulted in clearly higher root dry matter.
- Taxon
- French beanPhaseolus vulgarise0
- Organ / stage
- roote3
- Treatment
- local supply of Ne3
- Outcome
- root DMe3
- Direction
- highere3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To study the effects of local nitrogen supply on water and nutrient absorption, French bean ( Phaseolus vulgaris L.) plants were grown in a split root system”
e3“In treatments N0 and A0, the local supply of N resulted in clearly higher root DM, and water uptake from the nitrate‐supplied vessels was 82% higher than in the ‐N vessels”
Claim · model-written summary
Water uptake from the nitrate-supplied vessels was 82% higher than in the -N vessels under local N supply.
- Taxon
- French beanPhaseolus vulgarise0
- Treatment
- local supply of Ne3
- Outcome
- water uptake from the nitratee3
- Direction
- highere3
- Value
- 82%e3
- Comparator
- N vesselse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To study the effects of local nitrogen supply on water and nutrient absorption, French bean ( Phaseolus vulgaris L.) plants were grown in a split root system”
e3“In treatments N0 and A0, the local supply of N resulted in clearly higher root DM, and water uptake from the nitrate‐supplied vessels was 82% higher than in the ‐N vessels”
Claim · model-written summary
In A0 plants, water uptake from the -N nutrient solution was 129% higher than from the ammonium-supplied vessels.
- Taxon
- French beanPhaseolus vulgarise0
- Treatment
- A0e4
- Outcome
- water uptakee4
- Direction
- highere4
- Value
- 129%e4
- Qualifier
- nutrient solutione4
- Comparator
- ammoniume4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To study the effects of local nitrogen supply on water and nutrient absorption, French bean ( Phaseolus vulgaris L.) plants were grown in a split root system”
e4“However, in A0 plants, water uptake from the ‐N nutrient solution was 129% higher than from the ammonium‐supplied vessels”
Claim · model-written summary
Total water uptake was almost identical in the AA and A0 treatments.
- Taxon
- French beanPhaseolus vulgarise0
- Treatment
- AAe5
- Outcome
- total water uptakee5
- Direction
- almost identicale5
- Comparator
- A0e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To study the effects of local nitrogen supply on water and nutrient absorption, French bean ( Phaseolus vulgaris L.) plants were grown in a split root system”
e5“This indicates a compensatory effect, which resulted in almost identical rates of total water uptake of treatments AA and A0, which had comparable shoot DM and leaf area”
Claim · model-written summary
Shoot dry matter and leaf area were comparable between the AA and A0 treatments.
- Taxon
- French beanPhaseolus vulgarise0
- Treatment
- AAe5
- Outcome
- shoot DM and leaf areae5
- Direction
- comparablee5
- Comparator
- A0e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To study the effects of local nitrogen supply on water and nutrient absorption, French bean ( Phaseolus vulgaris L.) plants were grown in a split root system”
e5“This indicates a compensatory effect, which resulted in almost identical rates of total water uptake of treatments AA and A0, which had comparable shoot DM and leaf area”
Claim · model-written summary
The authors interpret the equal total water uptake as a compensatory effect.
- Taxon
- French beanPhaseolus vulgarise0
- Outcome
- total water uptakee5
- Qualifier
- compensatory effecte5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To study the effects of local nitrogen supply on water and nutrient absorption, French bean ( Phaseolus vulgaris L.) plants were grown in a split root system”
e5“This indicates a compensatory effect, which resulted in almost identical rates of total water uptake of treatments AA and A0, which had comparable shoot DM and leaf area”
Claim · model-written summary
Ammonium supply reduced potassium and magnesium absorption in French bean.
- Taxon
- French beanPhaseolus vulgarise0
- Treatment
- Ammonium supplye6
- Outcome
- potassium and magnesium absorptione6
- Direction
- reducede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To study the effects of local nitrogen supply on water and nutrient absorption, French bean ( Phaseolus vulgaris L.) plants were grown in a split root system”
e6“Ammonium supply reduced potassium and magnesium absorption”
Claim · model-written summary
Water uptake was positively correlated with N, Mg and K uptake.
- Taxon
- French beanPhaseolus vulgarise0
- Compound
- N, Mg and Ke7
- Outcome
- Water uptakee7
- Direction
- positively correlatede7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To study the effects of local nitrogen supply on water and nutrient absorption, French bean ( Phaseolus vulgaris L.) plants were grown in a split root system”
e7“Water uptake was positively correlated with N, Mg and K uptake”
The same questions in other papers
nitrogen · physiology: water · Phaseolus vulgaris (common bean)Positive and negative results
4 papers in the same direction as this paper · 1 reporting no difference from an alternative
- positive
- no effect
- negative
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See all 6 papers →nitrogen · growth · Phaseolus vulgaris (common bean)Positive and negative results
15 papers in the same direction as this paper · 44 reporting no difference from an alternative
- positive
- positive
- positive
56 papers more in this group
See all 60 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.