Abstract
Experiments were conducted to find out the optimum level of slow release N fertilizers when total amounts of nitrogen required throughout the growing season in paddy were applied in the soil of seedling box. To evaluate the emergence rate and growth of rice seedlings, five levels of Meister (MS) 10, MS S10, and latex coated urea (LCU) which are equivalent to 0, 40, 60, 80, and 100kg N h were mixed in soil of the seedling box. Emergence rate differed depending on the fertilizers and N levels; in MS 10 plots the emergence rate was 40.8% at 40kg N h and no seedlings were emerged at the higher levels, in MS S10 plots higher than 80% at all the N levels, and decreased with the N levels from 70.0% at 40 kg N h to 59.5% at 100kg N h of LCU. Seedling started to wilt at 40 kg N h of MS 10 and 80 and 100 kg N h N of LCU on the 8th day after sowing, while seedling growth was normal at all the levels of MS S10. Field performance of rice was evaluated at the 0, 30, 60, 90, 120kg N h of MS S10 applied in the soil of seedling box and N was not applied in paddy. Grain yield at 90 and 120kg N h of MS S10 was similar to conventional urea split application (120 kg N h ), but significantly higher compared to 30 and 60kg N h of MS S10. Fertilizer N recovery decreased with N levels and the N recovery at 90 kg N h of MS S10 and conventional urea split application were 62.2 % and 44.2%, respectively, with similar grain yield. The optimum level of MS S10 to be applied in seedling box seems to be about 90 kg N h considering grain yield, price of fertilizer, labor applying fertilizer, and fertilizer N recovery.d fertilizer N recovery.
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Claims 13
Claim · model-written summary
MS 10 at 40kg N h yielded 40.8% seedling emergence.
- Taxon
- Rice
Oryza sativat0 - Treatment
- MS 10e0
- Outcome
- emergence ratee0
- Value
- 40.8%e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in MS 10 plots the emergence rate was 40.8% at 40kg N h”
t0“Rice”
Claim · model-written summary
Higher MS 10 rates yielded no emerged seedlings.
- Taxon
- RiceOryza sativat0
- Treatment
- higher levelse0
- Outcome
- no seedlings were emergede0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no seedlings were emerged at the higher levels”
t0“Rice”
Claim · model-written summary
MS S10 produced emergence above 80% at all nitrogen levels.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Emergence rate differed depending on the fertilizers and N levels; in MS 10 plots the emergence rate was 40.8% at 40kg N h and no seedlings were emerged at the higher levels, in MS S10 plots higher than 80% at all the N levels”
t0“Rice”
Claim · model-written summary
LCU emergence fell from 70.0% at 40 kg N h to 59.5% at 100kg N h.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the emergence rate was 40.8% at 40kg N h and no seedlings were emerged at the higher levels, in MS S10 plots higher than 80% at all the N levels, and decreased with the N levels from 70.0% at 40 kg N h to 59.5% at 100kg N h of LCU”
t0“Rice”
Claim · model-written summary
MS 10 at 40 kg N h caused seedling wilting by day eight.
- Taxon
- RiceOryza sativat0
- Treatment
- 40 kg N h of MS 10e0
- Outcome
- Seedling started to wilte0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seedling started to wilt at 40 kg N h of MS 10”
t0“Rice”
Claim · model-written summary
LCU at 80 and 100 kg N h caused seedling wilting by day eight.
- Taxon
- RiceOryza sativat0
- Treatment
- 80 and 100 kg N h N of LCUe0
- Outcome
- Seedling started to wilte0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seedling started to wilt at 40 kg N h of MS 10 and 80 and 100 kg N h N of LCU on the 8th day after sowing”
t0“Rice”
Claim · model-written summary
Seedling growth was normal at every tested MS S10 level.
- Taxon
- RiceOryza sativat0
- Treatment
- MS S10e0
- Outcome
- seedling growth was normale0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seedling growth was normal at all the levels of MS S10”
t0“Rice”
Claim · model-written summary
MS S10 at 90 and 120kg N h gave grain yield similar to conventional split urea.
- Taxon
- RiceOryza sativat0
- Treatment
- 90 and 120kg N h of MS S10e0
- Outcome
- Grain yielde0
- Direction
- similare0
- Comparator
- conventional urea split applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield at 90 and 120kg N h of MS S10 was similar to conventional urea split application (120 kg N h )”
t0“Rice”
Claim · model-written summary
Grain yield at 90 and 120kg N h MS S10 exceeded that at 30 and 60kg N h.
- Taxon
- RiceOryza sativat0
- Treatment
- 90 and 120kg N h of MS S10e0
- Outcome
- Grain yielde0
- Direction
- highere0
- Comparator
- 30 and 60kg N h of MS S10e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield at 90 and 120kg N h of MS S10 was similar to conventional urea split application (120 kg N h ), but significantly higher compared to 30 and 60kg N h of MS S10”
t0“Rice”
Claim · model-written summary
Fertilizer nitrogen recovery decreased as nitrogen level increased.
- Taxon
- RiceOryza sativat0
- Treatment
- N levelse0
- Outcome
- Fertilizer N recoverye0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fertilizer N recovery decreased with N levels”
t0“Rice”
Claim · model-written summary
MS S10 at 90 kg N h achieved 62.2% fertilizer nitrogen recovery.
- Taxon
- RiceOryza sativat0
- Treatment
- 90 kg N h of MS S10e0
- Outcome
- N recoverye0
- Value
- 62.2 %e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N recovery at 90 kg N h of MS S10 and conventional urea split application were 62.2 % and 44.2%, respectively”
t0“Rice”
Claim · model-written summary
Conventional split urea achieved 44.2% fertilizer nitrogen recovery.
- Taxon
- RiceOryza sativat0
- Treatment
- conventional urea split applicatione0
- Outcome
- N recoverye0
- Value
- 44.2%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N recovery at 90 kg N h of MS S10 and conventional urea split application were 62.2 % and 44.2%, respectively”
t0“Rice”
Claim · model-written summary
The authors considered about 90 kg N h MS S10 the optimum seedbox rate.
- Taxon
- RiceOryza sativat0
- Outcome
- optimum level of MS S10 to be applied in seedling boxe0
- Value
- 90 kg N he0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The optimum level of MS S10 to be applied in seedling box seems to be about 90 kg N h”
t0“Rice”
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