Deep roots and soil structure.
Deep roots and soil structure.
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DOI：
10.1111/pce.12684
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发表时间：
2016-08
期刊：
影响因子：
--
通讯作者：
Whalley WR
中科院分区：
文献类型：
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作者：
Gao W;Hodgkinson L;Jin K;Watts CW;Ashton RW;Shen J;Ren T;Dodd IC;Binley A;Phillips AL;Hedden P;Hawkesford MJ;Whalley WR
在这篇观点文章中，我们研究了在野外穿透电阻与土壤深度之间的关系。假设根的生长在穿透电阻> 2.5 MPa时受到抑制，我们得出结论，在大多数情况下，随着深度的增加，穿透电阻的增加足够大，以限制大多数深根在现有的结构孔中伸长。我们认为，深层生根更可能与根系结构和土壤结构之间的相互作用有关，而不是与根系变形强土的能力有关。虽然根系变形强土的能力是一个重要的特性，但我们认为它与根系在表层的探索关系更密切，而不是深层扎根。
In this opinion article we examine the relationship between penetrometer resistance and soil depth in the field. Assuming that root growth is inhibited at penetrometer resistances > 2.5 MPa, we conclude that in most circumstances the increases in penetrometer resistance with depth are sufficiently great to confine most deep roots to elongating in existing structural pores. We suggest that deep rooting is more likely related to the interaction between root architecture and soil structure than it is to the ability of a root to deform strong soil. Although the ability of roots to deform strong soil is an important trait, we propose it is more closely related to root exploration of surface layers than deep rooting.