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 11
Claim · model-written summary
P uptake decreased with longer N. lugens infestation in Zhendao 2 rice.
- Taxon
- Rice
Oryza sativat0 - Material
- 'Zhendao 2'e0
- Treatment
- N. lugens infestatione0
- Interactor
- N. lugens
Nilaparvata lugense0pest - Outcome
- uptake of 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
K uptake decreased with longer N. lugens infestation in Zhendao 2 rice.
- 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
- Direction
- note0
Not reportedComparator
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 Xiushui 63, infestation for 2–8 days at 60 nymphs 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, but such infestation levels significantly influenced the uptake of P and K.”
t0“Rice Roots”
Claim · model-written summary
Infestation at 60 nymphs significantly influenced P uptake in Xiushui 63.
- 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
Infestation at 60 nymphs significantly influenced K uptake in Xiushui 63.
- 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
- Treatment
- removal of N. lugense0
- Interactor
- N. lugensNilaparvata lugense0pest
- Outcome
- N uptakee0
- 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', whereas the recovery rate of K uptake was faster than that for N and P in the variety 'Xiushui 63'.”
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
- Treatment
- removal of N. lugense0
- Interactor
- N. lugensNilaparvata lugense0pest
- Outcome
- 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 infestation density and duration.
- Taxon
- RiceOryza sativat0
- Treatment
- density and duration of infestatione0
- 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.”
t0“Rice Roots”
Claim · model-written summary
Below 15 nymphs per hill, N, P and K uptake of rice roots was largely unaffected.
- Taxon
- riceOryza sativae0
- Treatment
- N. lugens infestatione0
- Interactor
- N. lugensNilaparvata lugense0pest
- Outcome
- N, P, and K uptake of rice rootse0
- Direction
- largely not influencede0
- Qualifier
- below 15 nymphs per hille0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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.”
Claim · model-written summary
The below-15-nymph infestation level agreed with proposed control thresholds.
- 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.”
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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.