Abstract
The aim of this study is to increase soil organic compounds in the long term so as to increase the chemical properties and subsequently increase crop production, especially soybean. This research had used a completely factorial randomized design, consisting of 2 factors, 4 different levels of biochar sources and 4 levels of enriched biochar rates. Nutrients used for enrichment were N, P, and K; while the ratio between NPK was 8:5:4, solely based on the total amount of nutrients in soybean crops and their level in biochar. This research used Ultisol soil taken from Jasinga Sub-district, Bogor, West Java. The findings of this study indicated that the addition of biochar, with NPK enrichment (8:5:4), had the potential ability to improve acidic soil properties, including pH, C-organic, C/N, CEC, and NPK availability; while the addition of biochar only (without NPK enrichment) significantly increased soil pH, C/N, and C-organic. Increased soil chemical properties and escalation of NPK availabilities were also followed by enhancement of dry weight of plants correlated positively with N uptake (r = 0.72**), P absorption (r=0.32ns), and K absorption (r=0.98**), but negatively correlated with the weight and number of roots nodule (r = -0.54*). A negative correlation between nutrients uptake, especially N, and dry weight of the plant, might have a particular effect on the falling activity of the root nodules, as indicated by the number and weight of the root nodules.
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Claims 7
Claim · model-written summary
NPK-enriched biochar improved soil pH, organic carbon, C/N, CEC, and NPK availability.
- Taxon
- Soybean Plant
Glycine maxt0 - Treatment
- biochar, with NPK enrichment (8:5:4)e0
- Outcome
- acidic soil properties, including pH, C-organic, C/N, CEC, and NPK availabilitye0
- Direction
- improvee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the addition of biochar, with NPK enrichment (8:5:4), had the potential ability to improve acidic soil properties, including pH, C-organic, C/N, CEC, and NPK availability”
t0“Soybean Plant”
Claim · model-written summary
Biochar without NPK enrichment significantly increased soil pH, C/N, and organic carbon.
- Taxon
- Soybean PlantGlycine maxt0
- Treatment
- biochar only (without NPK enrichment)e0
- Outcome
- soil pH, C/N, and C-organice0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the addition of biochar only (without NPK enrichment) significantly increased soil pH, C/N, and C-organic”
t0“Soybean Plant”
Claim · model-written summary
Improved soil properties and NPK availability were accompanied by greater plant dry weight.
- Taxon
- Soybean PlantGlycine maxt0
- Outcome
- dry weight of plantse0
- Direction
- enhancemente0
- Qualifier
- Increased soil chemical properties and escalation of NPK availabilitiese0
Not reportedTreatmentSetting
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased soil chemical properties and escalation of NPK availabilities were also followed by enhancement of dry weight of plants”
t0“Soybean Plant”
Claim · model-written summary
Plant dry weight correlated positively with N uptake (r = 0.72**).
- Taxon
- Soybean PlantGlycine maxt0
- Compound
- Ne0
- Outcome
- dry weight of plantse0
- Direction
- positivelye0
- Value
- r = 0.72**e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dry weight of plants correlated positively with N uptake (r = 0.72**)”
t0“Soybean Plant”
Claim · model-written summary
Plant dry weight correlated positively with P absorption (r=0.32ns).
- Taxon
- Soybean PlantGlycine maxt0
- Compound
- Pe0
- Outcome
- P absorptione0
- Value
- r=0.32nse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P absorption (r=0.32ns)”
t0“Soybean Plant”
Claim · model-written summary
Plant dry weight correlated positively with K absorption (r=0.98**).
- Taxon
- Soybean PlantGlycine maxt0
- Compound
- Ke0
- Outcome
- K absorptione0
- Value
- r=0.98**e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“K absorption (r=0.98**)”
t0“Soybean Plant”
Claim · model-written summary
Plant dry weight correlated negatively with root-nodule weight and number (r = -0.54*).
- Taxon
- Soybean PlantGlycine maxt0
- Organ / stage
- roots nodulee0
- Outcome
- weight and number of roots nodulee0
- Direction
- negativelye0
- Value
- r = -0.54*e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“negatively correlated with the weight and number of roots nodule (r = -0.54*)”
t0“Soybean Plant”
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