PMID: 11604451Oct 18, 2001Paper

The position of localized soil compaction determines root and subsequent shoot growth responses

Journal of Experimental Botany
K D MontaguB J Atwell

Abstract

Plants growing in soils typically experience a mixture of loose and compact soil. The hypothesis that the proportion of a root system exposed to compact soil and/or the timing at which this exposure occurs determines shoot growth responses was tested. Broccoli (Brassica oleracea var. italica cv. Greenbelt) seedlings were grown in pot experiments with compact, loose and localized soil compaction created by either horizontal (compact subsoils 75 or 150 mm below loose topsoil) or vertical (adjacent compact and loose columns of soil) configurations of loose (1.2 Mg m(-3)) and compact (1.8 Mg m(-3)) soil. Entirely compact soil reduced leaf area by up to 54%, relative to loose soil. When compaction was localized, only the vertical columns of compact and loose soil reduced leaf area (by 30%). Neither the proportion of roots in compact soil nor the timing of exposure could explain the differing shoot growth responses to localized soil compaction. Instead, the strong relationship between total root length and leaf area (r(2)=0.92) indicated that localized soil compaction reduced shoot growth only when it suppressed total root length. This occurred when isolated root axes of the same plant were exposed to vertical columns of compact and ...Continue Reading

Citations

Aug 17, 2005·The New Phytologist·François LecompteHarry Ozier-Lafontaine
Dec 1, 2005·Journal of Experimental Botany·A Glyn BengoughTracy A Valentine
Jan 22, 2017·Environmental Science and Pollution Research International·Adnan Noor ShahBiangkham Souliyanonh
Jan 16, 2021·Science·Bipin K PandeyMalcolm J Bennett

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