Macropores in a compacted soil impact maize growth at the seedling stage: Effects of pore diameter and density

Xiong, Peng; Zhang, Zhongbin; Guo, Zichun; Peng, Xinhua

doi:10.1016/j.still.2022.105370

Cited by 9 publications

(8 citation statements)

References 46 publications

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“…Using X-ray computed tomography (CT), Xiong, Zhang, Wang, et al (2022) observed that biopores with a diameter of 2 mm had little impact on the nutrient uptake of maize from the subsoil because the maize root diameter was much lower than the biopore diameter, resulting in poor root-biopore wall contact. Xiong, Zhang, Guo, et al (2022) also found that 0.5 and 1 mm biopores promoted 15 N uptake of maize shoots compared with 2 mm biopores. Therefore, the establishment of good contact between the root and biopore wall to make full use of the advantages of biopores is very important for promoting crop growth.…”

Section: Locationmentioning

confidence: 73%

“…Xiong, Zhang, Guo, et al. (2022) also found that 0.5 and 1 mm biopores promoted 15 N uptake of maize shoots compared with 2 mm biopores. Therefore, the establishment of good contact between the root and biopore wall to make full use of the advantages of biopores is very important for promoting crop growth.…”

Section: Root–biopore Interactionsmentioning

confidence: 90%

“…Under 30% water holding capacity, Koch et al (2021) found that the shoot biomass of wheat increased when the biopore density increased, but not for root biomass. At a given biopore diameter of 0.5 mm, Xiong, Zhang, Guo, et al (2022) reported that a biopore density of 7000 m -2 might better enhance maize root growth than biopore densities of 1750 and 28,000 m -2 in compacted soil. Therefore, biopore characteristics such as biopore diameter and density may have a significant effect on crop performance.…”

Section: Root Growth Is Affected By Bioporesmentioning

confidence: 99%

“…Xiong, Zhang, Guo, et al. (2022) found that the number of biopores colonized by roots in compacted soil increased with increasing pore density. The result verified that the probability of roots encountering biopores increased with biopore density (Dexter, 1986).…”

Section: Root–biopore Interactionsmentioning

confidence: 99%

“…At a given biopore diameter of 0.5 mm, Xiong, Zhang, Guo, et al. (2022) reported that a biopore density of 7000 m –2 might better enhance maize root growth than biopore densities of 1750 and 28,000 m –2 in compacted soil. Therefore, biopore characteristics such as biopore diameter and density may have a significant effect on crop performance.…”

Section: Root–biopore Interactionsmentioning

confidence: 99%

See 4 more Smart Citations

Root and root‐derived biopore interactions in soils: A review

Xiong

Zhang

Peng

2022

J. Plant Nutr. Soil Sci.

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In recent years, the investigation of root–biopore interactions has been reported in many studies, particularly with the application of X‐ray computed tomography (CT). To clarify our understanding of root–biopore interactions, we reviewed the effects of plant roots on soil structure and the biopore effects on plant growth and uptake of nutrients and water. Plant roots can penetrate the soil matrix and form biopores after decay. The biopores are cylindrical, continuous, and stable and facilitate the transport of air and water. The soil around biopores also affects plant growth by its rich nutrients; hence, the concept of a biopore sheath is proposed to indicate the soil affected by the roots and resulting biopores. The behavior of roots encountering biopores is impacted by soil strength, oxygen concentration, biopore characteristics, and crop species. The biopores provide many channels with the least mechanical resistance for crop roots to enter the subsoil, improving the absorption of water and nutrients by crops. However, the effect of biopores on crop growth depends on biopore size. The smaller biopores (<2 mm) promoted plant growth, but the larger biopores did not (≥2 mm), which was mainly related to the degree of contact between root and soil in biopores. However, quantification of root–biopore wall contact is difficult due to the low resolution of CT images, which limits the understanding of the effects of biopore characteristics on plant growth and nutrient uptake. Therefore, determining the contact area between roots and soil in the biopores and revealing the contribution of biopore characteristics to water and nutrient uptake are important to give full play to the functions of biopores in sustainable agriculture.

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Section: Locationmentioning

confidence: 73%

Section: Root–biopore Interactionsmentioning

confidence: 90%