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 8
Claim · model-written summary
Biochar application rate significantly affected root morphological and mechanical properties.
- Taxon
- Lespedeza bicolor Turcz.
Lespedeza bicolort0 - Treatment
- biochar application ratee0
- Outcome
- root morphological and mechanical propertiese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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, total root length and specific root length exceeded those under other treatments.
- Taxon
- Lespedeza bicolor Turcz.Lespedeza bicolort0
- Treatment
- Treatment III (7.5 kg·m-2)e0
- Outcome
- root length, root biomass, total root length, and specific root lengthe0
- Direction
- greatere0
- Comparator
- the 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.”
t0“Lespedeza bicolor Turcz.”
Claim · model-written summary
Treatment III produced the highest secondary lateral root tensile strength.
- Taxon
- Lespedeza bicolor Turcz.Lespedeza bicolort0
- Treatment
- Treatment III (7.5 kg·m-2)e1
- 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“this treatment resulted in the highest tensile strength of the secondary lateral roots”
e1“Under Treatment III (7.5 kg·m-2)”
t0“Lespedeza bicolor Turcz.”
Claim · model-written summary
Treatment III increased root cellulose content.
- Taxon
- Lespedeza bicolor Turcz.Lespedeza bicolort0
- Treatment
- Treatment III (7.5 kg·m-2)e1
- Outcome
- cellulose contente0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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”
e1“Under Treatment III (7.5 kg·m-2)”
t0“Lespedeza bicolor Turcz.”
Claim · model-written summary
Treatment III decreased root lignin content.
- Taxon
- Lespedeza bicolor Turcz.Lespedeza bicolort0
- Treatment
- Treatment III (7.5 kg·m-2)e1
- Outcome
- lignin contente0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a decrease in lignin content”
e1“Under Treatment III (7.5 kg·m-2)”
t0“Lespedeza bicolor Turcz.”
Claim · model-written summary
Root tensile strength was positively correlated with cellulose content.
- Taxon
- Lespedeza bicolor Turcz.Lespedeza bicolort0
- Compound
- cellulosee0
- Outcome
- Root tensile strengthe0
- Direction
- positively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root tensile strength was positively correlated with cellulose content”
t0“Lespedeza bicolor Turcz.”
Claim · model-written summary
Root tensile strength was negatively correlated with lignin content.
- Taxon
- Lespedeza bicolor Turcz.Lespedeza bicolort0
- Compound
- lignine0
- Outcome
- Root tensile strengthe0
- Direction
- negatively correlatede0
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 identified 7.5 kg·m-2 as the optimal biochar rate for root soil reinforcement in this region.
- Taxon
- Lespedeza bicolor Turcz.Lespedeza bicolort0
- Outcome
- optimal biochar application rate for enhancing the soil reinforcement capacitye0
- Value
- 7.5 kg·m-2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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”
t0“Lespedeza bicolor Turcz.”