Abstract
Abstract The unique cation exchange, adsorption, hydration–dehydration, and catalytic properties of natural zeolites and their abundance have promoted their use in a wide variety of agricultural processes as soil amendments, slow‐release fertilizers, and other materials. To investigate the feasibility of using a natural clinoptilolite to enhance rice grain yield, nitrogen (N) recovery and N use efficiency, an experiment was conducted in a coarse‐textured rice field in the Guilan province of Iran. Three levels of 8, 16, or 24 tons of zeolite ha−1 were incorporated into the soil with and without 60 kg N ha−1 as urea, and their effects on the grain and straw yields, available K, apparent N recovery, N use efficiency, and some soil properties were determined. Results indicated a significant positive effect of treatments on the grain yield, straw, and tiller numbers of rice. All levels of zeolite with N showed a significant increase in grain yield compared with 60 kg N ha−1 and control treatment. Zeolite application also increased soil‐available potassium and its uptake by rice straw significantly. The lowest apparent N recovery (40%) was obtained from application of 60 kg N ha−1, whereas application of 8 or 16 tons zeolite ha−1 increased apparent N recovery up to 65%. Nitrogen use efficiency was also improved.
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Claims 7
Claim · model-written summary
The treatments significantly increased rice grain yield, straw yield and tiller number.
- Taxon
- rice
Oryza sativae0 - Treatment
- treatmentse0
- Outcome
- grain yield, straw, and tiller numberse0
- Direction
- positivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Results indicated a significant positive effect of treatments on the grain yield, straw, and tiller numbers of rice.”
Claim · model-written summary
Every zeolite level with nitrogen significantly increased rice grain yield relative to nitrogen alone and control.
- Taxon
- RiceOryza sativat0
- Treatment
- zeolite with Ne0
- Outcome
- grain yielde0
- Direction
- increasee0
- Comparator
- 60 kg N ha−1 and control treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All levels of zeolite with N showed a significant increase in grain yield compared with 60 kg N ha−1 and control treatment.”
t0“Rice”
Claim · model-written summary
Zeolite significantly increased soil-available potassium.
- Taxon
- RiceOryza sativat0
- Treatment
- Zeolite applicatione0
- Outcome
- soil‐available potassiume0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zeolite application also increased soil‐available potassium and its uptake by rice straw significantly.”
t0“Rice”
Claim · model-written summary
Zeolite significantly increased potassium uptake by rice straw.
- Taxon
- RiceOryza sativat0
- Organ / stage
- strawe0
- Treatment
- Zeolite applicatione0
- Outcome
- its uptake by rice strawe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zeolite application also increased soil‐available potassium and its uptake by rice straw significantly.”
t0“Rice”
Claim · model-written summary
Nitrogen alone gave the lowest apparent nitrogen recovery, at 40%.
- Taxon
- RiceOryza sativat0
- Treatment
- 60 kg N ha−1e0
- Outcome
- apparent N recoverye0
- Direction
- loweste0
- Value
- 40%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lowest apparent N recovery (40%) was obtained from application of 60 kg N ha−1”
t0“Rice”
Claim · model-written summary
Applying 8 or 16 tons of zeolite per hectare raised apparent nitrogen recovery to 65%.
- Taxon
- RiceOryza sativat0
- Treatment
- 8 or 16 tons zeolite ha−1e0
- Outcome
- apparent N recoverye0
- Direction
- increasede0
- Value
- 65%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of 8 or 16 tons zeolite ha−1 increased apparent N recovery up to 65%”
t0“Rice”
Claim · model-written summary
Nitrogen use efficiency improved under the zeolite treatments.
- Taxon
- RiceOryza sativat0
- Treatment
- Zeolite applicatione1
- Outcome
- Nitrogen use efficiencye0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen use efficiency was also improved.”
e1“Zeolite application also increased”
t0“Rice”
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See all 7 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.