Abstract
To investigate the effects of biochar on the root growth and soil reinforcement capacity of slope vegetation in high-altitude regions, in this study, Yajiang County, Garze Tibetan Autonomous Prefecture, Sichuan Province, was selected as the experimental area, and Lespedeza bicolor was selected as the research object. Six biochar application gradients were established: 0 kg·m-2 (CK), 2.5 kg·m-2 (I), 5 kg·m-2 (II), 7.5 kg·m-2 (III), 10 kg·m-2 (IV), and 12.5 kg·m-2 (V). The effects of different application rates on the soil physical and chemical properties, root morphology, chemical composition, and tensile strength of L. bicolor were systematically analyzed. The results indicated that the biochar application rate significantly affected the root morphological and mechanical properties. Under Treatment III (7.5 kg·m-2), the root length, root biomass, total root length, and specific root length of L. bicolor were significantly greater than those under the other treatments. Moreover, this treatment resulted in the highest tensile strength of the secondary lateral roots, which was accompanied by an increase in cellulose content and a decrease in lignin content. Root tensile strength was positively correlated with cellulose content and negatively correlated with lignin content. In conclusion, an appropriate amount of biochar can promote root development and increase its tensile strength by improving soil conditions and regulating root chemical composition. Among the tested concentrations, 7.5 kg·m-2 was the optimal biochar application rate for enhancing the soil reinforcement capacity of the roots of L. bicolor in this region. This study provides theoretical support and a practical reference for slope ecological restoration in high-altitude areas.
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Claims 9
Claim · model-written summary
Biochar rate significantly affected root morphology and mechanical properties.
- Taxon
- Lespedeza bicolor
Lespedeza bicolort0 - Treatment
- biochar application ratee0
- Outcome
- root morphological and mechanical propertiese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results indicated that the biochar application rate significantly affected the root morphological and mechanical properties.”
t0“Lespedeza bicolor Turcz.”
Claim · model-written summary
At 7.5 kg·m-2, root length, root biomass, and total root length exceeded the other treatments.
- Taxon
- L. bicolorLespedeza bicolore0
- Treatment
- Treatment III (7.5 kg·m-2)e0
- Outcome
- root length, root biomass, total root lengthe0
- Direction
- greatere0
- Comparator
- other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under Treatment III (7.5 kg·m-2), the root length, root biomass, total root length, and specific root length of L. bicolor were significantly greater than those under the other treatments.”
Claim · model-written summary
At 7.5 kg·m-2, specific root length exceeded the other treatments.
- Taxon
- L. bicolorLespedeza bicolore0
- Treatment
- Treatment III (7.5 kg·m-2)e0
- Outcome
- specific root lengthe0
- Direction
- greatere0
- Comparator
- other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under Treatment III (7.5 kg·m-2), the root length, root biomass, total root length, and specific root length of L. bicolor were significantly greater than those under the other treatments.”
Claim · model-written summary
Treatment III gave the highest secondary lateral root tensile strength.
- Taxon
- Lespedeza bicolorLespedeza bicolort0
- Treatment
- this treatmente0
- Outcome
- tensile strength of the secondary lateral rootse0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Moreover, this treatment resulted in the highest tensile strength of the secondary lateral roots, which was accompanied by an increase in cellulose content and a decrease in lignin content.”
t0“Lespedeza bicolor Turcz.”
Claim · model-written summary
Treatment III increased root cellulose content.
- Taxon
- Lespedeza bicolorLespedeza bicolort0
- Treatment
- this treatmente0
- Outcome
- cellulose contente0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Moreover, this treatment resulted in the highest tensile strength of the secondary lateral roots, which was accompanied by an increase in cellulose content and a decrease in lignin content.”
t0“Lespedeza bicolor Turcz.”
Claim · model-written summary
Treatment III decreased root lignin content.
- Taxon
- Lespedeza bicolorLespedeza bicolort0
- Treatment
- this treatmente0
- Outcome
- lignin contente0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Moreover, this treatment resulted in the highest tensile strength of the secondary lateral roots, which was accompanied by an increase in cellulose content and a decrease in lignin content.”
t0“Lespedeza bicolor Turcz.”
Claim · model-written summary
Root tensile strength correlated positively with cellulose content.
- Taxon
- Lespedeza bicolorLespedeza bicolort0
- Compound
- cellulosee0
- Outcome
- Root tensile strengthe0
- Direction
- positivelye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root tensile strength was positively correlated with cellulose content and negatively correlated with lignin content.”
t0“Lespedeza bicolor Turcz.”
Claim · model-written summary
Root tensile strength correlated negatively with lignin content.
- Taxon
- Lespedeza bicolorLespedeza bicolort0
- Compound
- lignine0
- Outcome
- Root tensile strengthe0
- Direction
- negativelye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root tensile strength was positively correlated with cellulose content and negatively correlated with lignin content.”
t0“Lespedeza bicolor Turcz.”
Claim · model-written summary
The authors identify 7.5 kg·m-2 as optimal for root soil reinforcement.
- Taxon
- L. bicolorLespedeza bicolore0
- Treatment
- 7.5 kg·m-2e0
- Outcome
- optimal biochar application rate for enhancing the soil reinforcement capacity of the rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Among the tested concentrations, 7.5 kg·m-2 was the optimal biochar application rate for enhancing the soil reinforcement capacity of the roots of L. bicolor in this region.”