Abstract
Abstract This study investigated the uptake of three macronutrients, including nitrogen (N), phosphorus (P), and potassium (K), by rice roots in response to different infestation levels of Nilaparvata lugens (Stål) (Homoptera: Delphacidae). Hydroponics experiments were conducted on the rice variety ‘Zhendao 2’ (moderately resistant to Tryporyza incertulas, Lepidoptera: Pyralidae) and the variety ‘Xiushui 63’ (susceptible to N. lugens). In ‘Zhendao 2’, N. lugens infestation significantly influenced the uptake of P and K but not N, with P and K uptake decreasing as the duration of N. lugens infestation increased. In ‘Xiushui 63’, N. lugens infestation influenced N, P, and K uptake to a different degree, depending on the infestation level, in which infestation for 2, 4, 6, and 8 d at a density of 60 nymphs did not affect N uptake, but such infestation levels significantly influenced the uptake of P and K. After the removal of N. lugens from rice plants, the N uptake recovered from infestation faster than that for P and K in the variety ‘Zhendao 2’, whereas the recovery rate of K uptake was faster than that for N and P in the variety ‘Xiushui 63’. The recovery rate of the nutrient uptake was negatively correlated to the density and duration of infestation. The experimental results demonstrated that N, P, and K uptake of rice roots were largely not influenced by N. lugens infestation when the pest density was controlled below 15 nymphs per hill. This infestation level was in agreement with the proposed economic thresholds for control measures against the N. lugens infestation on rice plants.
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Claims 12
Claim · model-written summary
In Zhendao 2, longer N. lugens infestation decreased rice root P uptake significantly.
- Taxon
- Rice
Oryza sativat0 - Material
- ‘Zhendao 2’e0
- Treatment
- N. lugens infestatione0
- Interactor
- N. lugens
Nilaparvata lugense0pest - Outcome
- Pe0
- Direction
- decreasinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In ‘Zhendao 2’, N. lugens infestation significantly influenced the uptake of P and K but not N, with P and K uptake decreasing as the duration of N. lugens infestation increased.”
t0“Rice Roots”
Claim · model-written summary
In Zhendao 2, longer N. lugens infestation decreased rice root K uptake significantly.
- Taxon
- RiceOryza sativat0
- Material
- ‘Zhendao 2’e0
- Treatment
- N. lugens infestatione0
- Interactor
- N. lugensNilaparvata lugense0pest
- Outcome
- K uptakee0
- Direction
- decreasinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In ‘Zhendao 2’, N. lugens infestation significantly influenced the uptake of P and K but not N, with P and K uptake decreasing as the duration of N. lugens infestation increased.”
t0“Rice Roots”
Claim · model-written summary
N uptake in Zhendao 2 was not significantly influenced by N. lugens infestation.
- Taxon
- RiceOryza sativat0
- Material
- ‘Zhendao 2’e0
- Treatment
- N. lugens infestatione0
- Interactor
- N. lugensNilaparvata lugense0pest
- Outcome
- Ne0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In ‘Zhendao 2’, N. lugens infestation significantly influenced the uptake of P and K but not N”
t0“Rice Roots”
Claim · model-written summary
In Xiushui 63, infestation with 60 nymphs for 2, 4, 6, or 8 days did not affect N uptake.
- Taxon
- RiceOryza sativat0
- Material
- ‘Xiushui 63’e0
- Treatment
- infestation for 2, 4, 6, and 8 d at a density of 60 nymphse0
- Interactor
- N. lugensNilaparvata lugense0pest
- Outcome
- N uptakee0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In ‘Xiushui 63’, N. lugens infestation influenced N, P, and K uptake to a different degree, depending on the infestation level, in which infestation for 2, 4, 6, and 8 d at a density of 60 nymphs did not affect N uptake”
t0“Rice Roots”
Claim · model-written summary
In Xiushui 63, those infestation levels significantly influenced P uptake, with direction unstated.
- Taxon
- RiceOryza sativat0
- Material
- ‘Xiushui 63’e0
- Treatment
- infestation for 2, 4, 6, and 8 d at a density of 60 nymphse0
- Interactor
- N. lugensNilaparvata lugense0pest
- Outcome
- uptake of Pe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In ‘Xiushui 63’, N. lugens infestation influenced N, P, and K uptake to a different degree, depending on the infestation level, in which infestation for 2, 4, 6, and 8 d at a density of 60 nymphs did not affect N uptake, but such infestation levels significantly influenced the uptake of P and K.”
t0“Rice Roots”
Claim · model-written summary
In Xiushui 63, those infestation levels significantly influenced K uptake, with direction unstated.
- Taxon
- RiceOryza sativat0
- Material
- ‘Xiushui 63’e0
- Treatment
- infestation for 2, 4, 6, and 8 d at a density of 60 nymphse0
- Interactor
- N. lugensNilaparvata lugense0pest
- Outcome
- K uptakee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In ‘Xiushui 63’, N. lugens infestation influenced N, P, and K uptake to a different degree, depending on the infestation level, in which infestation for 2, 4, 6, and 8 d at a density of 60 nymphs did not affect N uptake, but such infestation levels significantly influenced the uptake of P and K.”
t0“Rice Roots”
Claim · model-written summary
After pest removal, N uptake recovered faster than P and K uptake in Zhendao 2.
- Taxon
- riceOryza sativae0
- Material
- ‘Zhendao 2’e0
- Interactor
- N. lugensNilaparvata lugense0pest
- Outcome
- N uptake recovered from infestatione0
- Direction
- fastere0
- Comparator
- P and Ke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After the removal of N. lugens from rice plants, the N uptake recovered from infestation faster than that for P and K in the variety ‘Zhendao 2’”
Claim · model-written summary
After pest removal, K uptake recovered faster than N and P uptake in Xiushui 63.
- Taxon
- riceOryza sativae0
- Material
- ‘Xiushui 63’e0
- Interactor
- N. lugensNilaparvata lugense0pest
- Outcome
- recovery rate of K uptakee0
- Direction
- fastere0
- Comparator
- N and Pe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After the removal of N. lugens from rice plants, the N uptake recovered from infestation faster than that for P and K in the variety ‘Zhendao 2’, whereas the recovery rate of K uptake was faster than that for N and P in the variety ‘Xiushui 63’”
Claim · model-written summary
Nutrient uptake recovery rate was negatively correlated with pest density.
- Taxon
- riceOryza sativae1
- Treatment
- densitye0
- Interactor
- N. lugensNilaparvata lugense1pest
- Outcome
- recovery rate of the nutrient uptakee0
- Direction
- negatively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The recovery rate of the nutrient uptake was negatively correlated to the density and duration of infestation.”
e1“After the removal of N. lugens from rice plants”
Claim · model-written summary
Nutrient uptake recovery rate was negatively correlated with infestation duration.
- Taxon
- riceOryza sativae1
- Treatment
- duration of infestatione0
- Interactor
- N. lugensNilaparvata lugense1pest
- Outcome
- recovery rate of the nutrient uptakee0
- Direction
- negatively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The recovery rate of the nutrient uptake was negatively correlated to the density and duration of infestation.”
e1“After the removal of N. lugens from rice plants”
Claim · model-written summary
Below 15 nymphs per hill, N, P and K uptake of rice roots was largely not influenced by N. lugens infestation.
- Taxon
- riceOryza sativae0
- Treatment
- N. lugens infestatione0
- Interactor
- N. lugensNilaparvata lugense0pest
- Outcome
- N, P, and K uptake of rice rootse0
- Direction
- not influencede0
- Value
- below 15 nymphs per hille0
- Qualifier
- largelye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N, P, and K uptake of rice roots were largely not influenced by N. lugens infestation when the pest density was controlled below 15 nymphs per hill”
Claim · model-written summary
The observed low-density threshold agreed with proposed economic thresholds for control of N. lugens in rice.
- Taxon
- riceOryza sativae0
- Interactor
- N. lugensNilaparvata lugense0pest
- Outcome
- in agreement with the proposed economic thresholdse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This infestation level was in agreement with the proposed economic thresholds for control measures against the N. lugens infestation on rice plants.”
The same questions in other papers
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See all 19 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.