Abstract
Background: The main problem in nitrogen fertilization for crop cultivated is the very low efficiency due to the leaching process. The purpose of this study was to the determination of the optimum levels of biochar amendment made from Melaleuca cajuputi biochar (MCB) and urea fertilizer (UF) for nitrogen use efficiency in upland rice under M. cajuputi stands. Methods: The study was conducted during dry season within March to June 2019 in Menggoran Forest Resort, Playen Forest Section, Yogyakarta Forest Management District, Indonesia. The experimental design was laid out in a randomized complete block design factorial with three replications as the response surface methodology (RSM). The treatments consisted of MCB levels (0, 5, 10, 15 tons ha-1) and UF levels (0, 100, 200, 300 kg ha-1) as independent variables. The observation parameters were nitrate reductase activity (NRA), total chlorophyll (TC), leaf photosynthesis rate (LPR), nitrogen loss (NL), nitrogen use efficiency (NUE) and seed yield (SY). The data was analyzed using RSM approach and ridge regression. Result: The optimizing applications of 11.14 tons ha-1 of MCB and 281.13 kg ha-1 of UF resulted in NUE and SY by 2.14 kg grain kg Nfertilizer-1 and 5.83 tons ha-1 or increased by 19.07% and 13.02%, compared to a single application of UF by 300 kg ha-1.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 2
Claim · model-written summary
Optimized biochar and urea application increased nitrogen use efficiency of upland rice by 19.07% over a single urea application.
- Taxon
- upland rice
Oryza sativae0 - Treatment
- optimizing applications of 11.14 tons ha-1 of MCB and 281.13 kg ha-1 of UFe1
- Outcome
- NUEe1
- Direction
- increasede1
- Value
- 19.07%e1
- Qualifier
- 2.14 kg grain kg Nfertilizer-1e1
- Comparator
- a single application of UF by 300 kg ha-1e1
- Setting
- Menggoran Forest Resorte2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“for nitrogen use efficiency in upland rice under M. cajuputi stands”
e1“The optimizing applications of 11.14 tons ha-1 of MCB and 281.13 kg ha-1 of UF resulted in NUE and SY by 2.14 kg grain kg Nfertilizer-1 and 5.83 tons ha-1 or increased by 19.07% and 13.02%, compared to a single application of UF by 300 kg ha-1”
e2“Menggoran Forest Resort, Playen Forest Section, Yogyakarta Forest Management District, Indonesia”
Claim · model-written summary
Optimized biochar and urea application increased seed yield of upland rice by 13.02% over a single urea application.
- Taxon
- upland riceOryza sativae0
- Treatment
- optimizing applications of 11.14 tons ha-1 of MCB and 281.13 kg ha-1 of UFe1
- Outcome
- SYe1
- Direction
- increasede1
- Value
- 13.02%e1
- Qualifier
- 5.83 tons ha-1e1
- Comparator
- a single application of UF by 300 kg ha-1e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“for nitrogen use efficiency in upland rice under M. cajuputi stands”
e1“The optimizing applications of 11.14 tons ha-1 of MCB and 281.13 kg ha-1 of UF resulted in NUE and SY by 2.14 kg grain kg Nfertilizer-1 and 5.83 tons ha-1 or increased by 19.07% and 13.02%, compared to a single application of UF by 300 kg ha-1”
The same questions in other papers
biochar · nutrient: efficiency · Oryza sativa (rice)Positive and negative results
13 papers in the same direction as this paper · 4 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
- no effect
15 papers more in this group
See all 19 papers →biochar · yield · Oryza sativa (rice)Positive and negative results
134 papers in the same direction as this paper · 12 in the opposite direction
- positive
- negative
- no effect
143 papers more in this group
See all 147 papers →fertilization · nutrient: efficiency · Oryza sativa (rice)Positive and negative results
201 papers in the same direction as this paper · 12 in the opposite direction · 6 reporting no difference from an alternative
- no effect
- no effect
- negative
216 papers more in this group
See all 220 papers →nitrogen · nutrient: efficiency · Oryza sativa (rice)Positive and negative results
216 papers in the same direction as this paper · 41 in the opposite direction · 4 reporting no difference from an alternative
- negative
- negative
- no effect
258 papers more in this group
See all 262 papers →nitrogen · yield · Oryza sativa (rice)Positive and negative results
1,802 papers in the same direction as this paper · 193 in the opposite direction · 49 reporting no difference from an alternative
- positive
- negative
- negative
2,041 papers more in this group
See all 2,045 papers →fertilization · yield · Oryza sativa (rice)Positive and negative results
3,182 papers in the same direction as this paper · 207 in the opposite direction · 65 reporting no difference from an alternative
- positive
- no effect
- no effect
3,451 papers more in this group
See all 3,455 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.