Spatial distribution and simulation for fine roots of triploid <em>Populus tomentosa</em> with wide and narrow row spacing

XI Ben-ye; JIA Li-ming; LIU Yin; WANG Ye

doi:10.11833/j.issn.2095-0756.2010.02.016

Volume 27 Issue 2

Apr. 2010

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XI Ben-ye, JIA Li-ming, LIU Yin, WANG Ye. Spatial distribution and simulation for fine roots of triploid Populus tomentosa with wide and narrow row spacing[J]. Journal of Zhejiang A&F University, 2010, 27(2): 259-265. doi: 10.11833/j.issn.2095-0756.2010.02.016

Citation:

XI Ben-ye, JIA Li-ming, LIU Yin, WANG Ye. Spatial distribution and simulation for fine roots of triploid Populus tomentosa with wide and narrow row spacing[J]. Journal of Zhejiang A&F University, 2010, 27(2): 259-265. doi: 10.11833/j.issn.2095-0756.2010.02.016

Spatial distribution and simulation for fine roots of triploid Populus tomentosa with wide and narrow row spacing

doi: 10.11833/j.issn.2095-0756.2010.02.016

1.
The Key Laboratory for Silviculture and Conservation of Ministry of Education，Beijing Forestry University， Beijing 100083，China

More Information

Corresponding author: JIA Li-ming
Publish Date: 2010-04-20

Abstract

To form a basis for constructing a root-water-uptake model of triploid Populus tomentosa，spatial distribution characteristics of fine roots were studied through wide （6 m） and narrow （2 m） row spacing planting schemes，and soil coring method using correlation，regression and variance analyses. Results showed that vertically，in both wide and narrow spaced rows，the fine roots were mainly concentrated within the 0 － 20 cm soil layer where their amount were 0.080 cmcm-3 and 0.074 cmcm-3 accounting for 44.1% and 48.7% of the total，respectively. For a radial distance of 100 cm from the stem，the fine root length density of 0 － 20，20 － 40，40 － 60 and 60 － 80 cm soil layer in a wide row increased by 35.45%，36.76%，71.67% and 72.27% as compared with that of the corresponding soil layer in a narrow row. Horizontally，in the wide row fine root length density from 20 － 200 cm showed an exponentially declining distribution. The fine roots were mainly concentrated within the 20 － 80 cm soil zone，and within the 0 － 200 cm range these roots were 0.250 cmcm-3 occupying 49.20% of the area. The fine roots in the narrow-spaced row were distributed irregularly with no significant differences among the fine root length densities for different radial distances. In addition，a one-dimensional （R2 = 0.228） root length density function was fitted to narrow spaced rows，while the two-dimensional （R = 0.538） was fitted to the wide row.［Ch，5 fig. 2 tab. 12 ref.］
- silviculture,
- fine roots,
- spatial distribution,
- triploid Populus tomentosa,
- wide and narrow row spacing

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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Spatial distribution and simulation for fine roots of triploid Populus tomentosa with wide and narrow row spacing

1. The Key Laboratory for Silviculture and Conservation of Ministry of Education，Beijing Forestry University， Beijing 100083，China

Corresponding author: JIA Li-ming

Publish Date: 2010-04-20

Key words:

Abstract: To form a basis for constructing a root-water-uptake model of triploid Populus tomentosa，spatial distribution characteristics of fine roots were studied through wide （6 m） and narrow （2 m） row spacing planting schemes，and soil coring method using correlation，regression and variance analyses. Results showed that vertically，in both wide and narrow spaced rows，the fine roots were mainly concentrated within the 0 － 20 cm soil layer where their amount were 0.080 cmcm-3 and 0.074 cmcm-3 accounting for 44.1% and 48.7% of the total，respectively. For a radial distance of 100 cm from the stem，the fine root length density of 0 － 20，20 － 40，40 － 60 and 60 － 80 cm soil layer in a wide row increased by 35.45%，36.76%，71.67% and 72.27% as compared with that of the corresponding soil layer in a narrow row. Horizontally，in the wide row fine root length density from 20 － 200 cm showed an exponentially declining distribution. The fine roots were mainly concentrated within the 20 － 80 cm soil zone，and within the 0 － 200 cm range these roots were 0.250 cmcm-3 occupying 49.20% of the area. The fine roots in the narrow-spaced row were distributed irregularly with no significant differences among the fine root length densities for different radial distances. In addition，a one-dimensional （R2 = 0.228） root length density function was fitted to narrow spaced rows，while the two-dimensional （R = 0.538） was fitted to the wide row.［Ch，5 fig. 2 tab. 12 ref.］

Spatial distribution and simulation for fine roots of triploid Populus tomentosa with wide and narrow row spacing

doi: 10.11833/j.issn.2095-0756.2010.02.016

Abstract

References

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通讯作者: 陈斌, bchen63@163.com

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Spatial distribution and simulation for fine roots of triploid Populus tomentosa with wide and narrow row spacing

doi: 10.11833/j.issn.2095-0756.2010.02.016

1. The Key Laboratory for Silviculture and Conservation of Ministry of Education，Beijing Forestry University， Beijing 100083，China

Corresponding author: JIA Li-ming

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Spatial distribution and simulation for fine roots of triploid Populus tomentosa with wide and narrow row spacing

doi: 10.11833/j.issn.2095-0756.2010.02.016

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通讯作者: 陈斌, bchen63@163.com

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Spatial distribution and simulation for fine roots of triploid Populus tomentosa with wide and narrow row spacing

doi: 10.11833/j.issn.2095-0756.2010.02.016

1. The Key Laboratory for Silviculture and Conservation of Ministry of Education，Beijing Forestry University， Beijing 100083，China

Corresponding author: JIA Li-ming

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