Variable responses of maize roots at the seedling stage to artificial biopores in noncompacted and compacted soil

Xiong, Peng; Zhang, Z.B.; Wang, Yuekai; Peng, Xinhua

doi:10.1007/s11368-021-03133-4

Cited by 3 publications

(7 citation statements)

References 46 publications

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“…Xiong, Zhang, Wang, et al. (2022) also found that roots tended to grow in biopores when the soil penetration resistance was greater than 2 MPa, whereas biopores were not necessary for root growth when they were less than 2 MPa. In a field study, Zhou et al.…”

Section: Root–biopore Interactionsmentioning

confidence: 95%

“…The roots usually colonize the biopores and change their growth direction when the soil is compacted (1.6 g cm -3 ), but the roots only cross the biopores without changing their direction of growth in noncompacted soil (1.2 g cm -3 ) (Atkinson et al, 2020). Xiong, Zhang, Wang, et al (2022) also found that roots tended to grow in biopores when the soil penetration resistance was greater than 2 MPa, whereas biopores were not necessary for root growth when they were less than 2 MPa. In a field study, Zhou et al (2021) observed that the proportion of roots in biopores increased with soil depth due to the impact of soil strength (overburden pressure).…”

Section: Behavior Of Roots Encountering Bioporesmentioning

confidence: 99%

“…When the roots grow in biopores with large diameters, even though the soil water is sufficient, the ability of roots to access water may also be restricted due to poor root-soil contact (Passioura, 2002). 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.…”

Section: Locationmentioning

confidence: 99%

“…Xiong, Zhang, Wang, et al. (2022) observed that maize roots did not tend to colonize the biopores in loose soil. Under good aeration conditions, Dexter (1986) found no evidence of preferential root growth toward the biopores.…”

Section: Root–biopore Interactionsmentioning

confidence: 99%

“…The roots tended to leave the pores when the pore angle was close to the horizontal plane (Hirth et al., 2005). In conclusion, the behavior of roots encountering biopores can be influenced by multiple factors including soil strength, oxygen stress, and pore characteristics (Colombi et al., 2017; Dexter, 1986; Xiong, Zhang, Wang, et al., 2022).…”

Section: Root–biopore Interactionsmentioning

confidence: 99%

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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: Root–biopore Interactionsmentioning

confidence: 95%

Section: Behavior Of Roots Encountering Bioporesmentioning

confidence: 99%

Section: Locationmentioning

confidence: 99%

Section: Root–biopore Interactionsmentioning

confidence: 99%

Section: Root–biopore Interactionsmentioning

confidence: 99%

See 3 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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Macropores in a compacted soil impact maize growth at the seedling stage: Effects of pore diameter and density

Xiong

Zhang

Guo

et al. 2022

Soil and Tillage Research

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The pore‐rhizosheath shapes maize root architecture by enhancing root distribution in macropores

Liu,

Qin,

Richard Whalley

et al. 2024

Plant Cell & Environment

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Pores and old root‐channels are preferentially used by roots to allow them to penetrate hard soils. However, there are few studies that have accounted for the effects of pore‐rhizosheath on root growth. In this study, we developed an approach by adding the synthetic root exudates using a porous stainless tube with 0.1‐mm micropores through a peristaltic pump to reproduce the rhizosheath around the artificial pore, and investigated the effects of pores with and without rhizosheaths on maize root growth in a dense soil. The results indicated that the artificial rhizosheath was about 2.69 mm wide in the region surrounding the pores. The rhizosheath had a higher content of organic carbon, total nitrogen, and abundance of Actinobacteria than that of the bulk soil. Compared with the artificial macropores, the artificial root‐pores with a rhizosheath increased the opportunities for root utilisation of the pores space, promoting steeper and deeper root growth. It is concluded that the pore‐rhizosheath has a significant impact on root architecture by enhancing root distribution in macropores.

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Variable responses of maize roots at the seedling stage to artificial biopores in noncompacted and compacted soil

Cited by 3 publications

References 46 publications

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

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

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

The pore‐rhizosheath shapes maize root architecture by enhancing root distribution in macropores

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