Abstract
Drought stress and nutrient deficiency are two main factors that restrict the growth and yield of peanut (Arachis hypogaea L.) in arid and semi-arid regions. However, the effects of N fertilizer on root growth and pod yield of peanut under different water conditions are unclear. The growth, root morphology, and pod yield of peanut were studied under different water and N combinations. Two soil water treatments were tested: Well-watered (WW, 80%-85% field capacity) and drought stress conditions (DS, 55%-60% field capacity). Three N treatments were tested: no N application (NN), moderate N (MN, 90 kg ha -1 ), and high N (HN, 180 kg ha -1 ). Results showed that pod yield of peanut was limited by drought and N deficiency. Compared with NN, peanut shoot DM and pod yield were improved by MN under DS, with an average increase range of pod yield of 16.2% in the 2 yr. The annual average root length density (RLD) in the deeper soil layer (40-100 cm) was 5.5% higher under DS-MN than DS-NN treatment. The N use efficiency (NUE) was 12.3% higher under WW than DS treatment, and the NUE of MN was significantly higher than that of HN under different water treatments. Root lengths in 40-60 and 60-80 cm soil layers were also positively correlated with pod yield (r = 0.66** and 0.47**, respectively) and NUE (r = 0.60* and 0.85**, respectively). In this study, root growth in deeper soil was improved by MN application under DS, thus increasing yield and NUE of DS conditions.
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Claims 11
Claim · model-written summary
Drought limited peanut pod yield.
- Taxon
- peanut
Arachis hypogaeae0 - Treatment
- droughte0
- Outcome
- pod yielde0
- Direction
- limitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pod yield of peanut was limited by drought and N deficiency”
Claim · model-written summary
Nitrogen deficiency limited peanut pod yield.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- N deficiencye0
- Outcome
- pod yielde0
- Direction
- limitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pod yield of peanut was limited by drought and N deficiency”
Claim · model-written summary
Moderate nitrogen improved peanut shoot dry matter under drought versus no nitrogen.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- MNe0
- Outcome
- shoot DMe0
- Direction
- improvede0
- Qualifier
- under DSe0
- Comparator
- NNe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with NN, peanut shoot DM and pod yield were improved by MN under DS”
Claim · model-written summary
Moderate nitrogen improved peanut pod yield under drought by 16.2% on average across two years.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- MNe0
- Outcome
- pod yielde0
- Direction
- improvede0
- Value
- 16.2%e0
- Qualifier
- under DSe0
- Comparator
- NNe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with NN, peanut shoot DM and pod yield were improved by MN under DS, with an average increase range of pod yield of 16.2% in the 2 yr”
Claim · model-written summary
Moderate nitrogen raised deeper-layer root length density 5.5% under drought versus no nitrogen.
- Taxon
- peanutArachis hypogaeat0
- Treatment
- DS-MNe0
- Outcome
- root length density (RLD)e0
- Direction
- highere0
- Value
- 5.5%e0
- Qualifier
- 40-100 cme0
- Comparator
- DS-NNe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“root length density (RLD) in the deeper soil layer (40-100 cm) was 5.5% higher under DS-MN than DS-NN treatment”
t0“peanut”
Claim · model-written summary
Nitrogen use efficiency was 12.3% higher under well-watered than drought conditions.
- Taxon
- peanutArachis hypogaeat0
- Treatment
- WWe0
- Outcome
- N use efficiency (NUE)e0
- Direction
- highere0
- Value
- 12.3%e0
- Comparator
- DSe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N use efficiency (NUE) was 12.3% higher under WW than DS treatment”
t0“peanut”
Claim · model-written summary
Moderate nitrogen yielded significantly higher nitrogen use efficiency than high nitrogen across water treatments.
- Taxon
- peanutArachis hypogaeat0
- Treatment
- MNe0
- Outcome
- NUEe0
- Direction
- highere0
- Qualifier
- under different water treatmentse0
- Comparator
- HNe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NUE of MN was significantly higher than that of HN under different water treatments”
t0“peanut”
Claim · model-written summary
Root length at 40–60 cm correlated positively with pod yield (r = 0.66**).
- Taxon
- peanutArachis hypogaeat0
- Organ / stage
- Root lengthse0
- Outcome
- pod yielde0
- Direction
- positively correlatede0
- Value
- r = 0.66**e0
- Qualifier
- 40-60e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root lengths in 40-60 and 60-80 cm soil layers were also positively correlated with pod yield (r = 0.66** and 0.47**, respectively)”
t0“peanut”
Claim · model-written summary
Root length at 60–80 cm correlated positively with pod yield (r = 0.47**).
- Taxon
- peanutArachis hypogaeat0
- Organ / stage
- Root lengthse0
- Outcome
- pod yielde0
- Direction
- positively correlatede0
- Value
- 0.47**e0
- Qualifier
- 60-80 cme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root lengths in 40-60 and 60-80 cm soil layers were also positively correlated with pod yield (r = 0.66** and 0.47**, respectively)”
t0“peanut”
Claim · model-written summary
Root length at 40–60 cm correlated positively with nitrogen use efficiency (r = 0.60*).
- Taxon
- peanutArachis hypogaeat0
- Organ / stage
- Root lengthse0
- Outcome
- NUEe0
- Direction
- positively correlatede0
- Value
- r = 0.60*e0
- Qualifier
- 40-60e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root lengths in 40-60 and 60-80 cm soil layers were also positively correlated with pod yield (r = 0.66** and 0.47**, respectively) and NUE (r = 0.60* and 0.85**, respectively)”
t0“peanut”
Claim · model-written summary
Root length at 60–80 cm correlated positively with nitrogen use efficiency (r = 0.85**).
- Taxon
- peanutArachis hypogaeat0
- Organ / stage
- Root lengthse0
- Outcome
- NUEe0
- Direction
- positively correlatede0
- Value
- 0.85**e0
- Qualifier
- 60-80 cme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root lengths in 40-60 and 60-80 cm soil layers were also positively correlated with pod yield (r = 0.66** and 0.47**, respectively) and NUE (r = 0.60* and 0.85**, respectively)”
t0“peanut”
The same questions in other papers
drought · yield · Arachis hypogaea (peanut)Results differ
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- positive
- negative
- negative
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See all 79 papers →nitrogen · yield · Arachis hypogaea (peanut)Results differ
124 papers in the same direction as this paper · 20 in the opposite direction
This paper is about lacking the nutrient, so it counts the other way round here.
- positive
- no effect
- negative
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See all 145 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.