SOIL WATER RETENTION CURVE AND S INDEX AS SOIL PHYSICAL QUALITY INDICATORS FOR INTEGRATED PRODUCTION SYSTEMS

Magalhães, Wellington de A.; Freddi, Onã da S.; Wruck, Flávio J.; Petter, Fabiano A.; Tavanti, Renan F. R.

doi:10.1590/1809-4430-Eng.Agric.v38n1p64-73/2018

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Sumário

Scientific Paper, Soil and Water Engineering • Eng. agríc. (Online) 38 (1) • Jan-Feb 2018 • https://doi.org/10.1590/1809-4430-Eng.Agric.v38n1p64-73/2018 copy

SOIL WATER RETENTION CURVE AND S INDEX AS SOIL PHYSICAL QUALITY INDICATORS FOR INTEGRATED PRODUCTION SYSTEMS

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Assess the physical quality of agricultural soils it is important to establish the management more adequate for plant growth. In this study, the soil water retention curve and S index as indicators of soil physical quality were evaluated in five integrated production systems in the following forestry arrangements: Eucalyptus in a single line, double line and triple line (Eucalyptus I, II and III respectively), Balsa in triple line and Teak triple line. The density and arrangement of forest trees influence the soil physical properties. Less soil water retention was observed in the Teak and Balsa wood systems in the layers 0-0.10 and 0.10-0.20 m. The field capacity, permanent wilting point, and available water were lower under the projection from the treetops, providing less soil water retention at this site. This position suffers more influence of the animal's footstep, having greater alterations on the soil structure. Integrated production systems showed poor soil structural quality based on the S index, averaging 0.034 and 0.035 for layers 0-0.10 and 0.10-0.20 m respectively.

KEYWORDS
Eucalyptus; pore size distribution; soil structure; ICLF

Agricultural year	Eucalyptus I	Eucalyptus II	Eucalyptus III	Teak	Balsa wood
1998	Opening the area	Opening the area	Opening the área	Opening the area	Opening the area
1998/1999 1999/2000	Urochloa brizantha	Urochloa brizantha	Urochloa brizantha	Urochloa brizantha	Urochloa brizantha
2000/2001 2001/2002	Glycine max + Zea mays	Glycine max + Zea mays	Glycine max + Zea mays	Glycine max + Zea mays	Glycine max + Zea mays
2002/2003 2003/2004 2004/2005 2005/2006	Upland rice Oryza sativa	Upland rice Oryza sativa	Upland rice Oryza sativa	Upland rice Oryza sativa	Upland rice Oryza sativa
2005/2006 2007/2008 2008/2009	Pasture U. brizantha	Pasture U. brizantha	Pasture U. brizantha	Pasture U. brizantha	Pasture U. brizantha
2008/2009	Eucalyptus I + O. sativa + U. brizantha	Eucalyptus II + O. sativa + U. brizantha	Eucalyptus III + O. sativa + U. brizantha	Teak + O. sativa + U. brizantha	Balsa wood + O. sativa + U. Brizantha
2009/2010 2010/2011	Eucalyptus I + G. max / Z. mays + U. brizantha	Eucalyptus II + G. max / Z. mays + U. brizantha	Eucalyptus III + G. max / Z. mays + U. brizantha	Teak + G. max / Z. mays + U. brizantha	Balsa wood + G. max / Z. mays + U. brizantha
2011/2012 2012/2013	Eucalyptus I + U. brizantha	Eucalyptus II + U. brizantha	Eucalyptus III + U. brizantha	Teak + U. brizantha	Balsa wood + U. Brizantha

Layer m	ICLF	Retention Curve Coefficients ⁽¹⁾
Layer m	ICLF	Ѳr	Ѳs	n	^α α n: coefficients for determining soil water retention curve.
	Eucalyptus I	0.22 a	0.48 a	1.29 a	0.045 a
	Eucalyptus II	0.24 a	0.49 a	1.33 a	0.034 ab
0-0.10	Eucalyptus III	0.24 a	0.49 a	1.35 a	0.037 ab
	Teak	0.22 a	0.45 b	1.33 a	0.024 b
	Balsa Wood	0.18 b	0.45 b	1.35 a	0.030 b
	Eucalyptus I	0.24 a	0.48 a	1.34 ab	0.106 a
	Eucalyptus II	0.24 a	0.48 a	1.30 b	0.083 ab
0.10-0.20	Eucalyptus III	0.24 a	0.49 a	1.36 a	0.091 ab
	Teak	0.22 b	0.45 b	1.31 ab	0.076 ab
	Balsa Wood	0.18 c	0.44 b	1.31 b	0.059 b

Layer m	Sampling position	Retention Curve Coefficients ⁽¹⁾
Layer m	Sampling position	Ѳr	Ѳs	n	^α α n: coefficients for determining soil water retention curve.
	1	0.22 a	0.48 a	1.33 a	0.033 b
	2	0.22 a	0.47 a	1.34 a	0.019 c
0-0.10	3	0.22 a	0.48 a	1.31 a	0.054 a
	4	0.22 a	0.46 a	1.34 a	0.033 b
	5	0.23 a	0.46 a	1.34 a	0.030 bc
	1	0.23 a	0.46 a	1.33 a	0.066 a
	2	0.22 a	0.48 a	1.32 a	0.094 a
0.10-0.20	3	0.23 a	0.47 a	1.32 a	0.102 a
	4	0.22 a	0.47 a	1.32 a	0.080 a
	5	0.23 a	0.46 a	1.34 a	0.072 a

Associação Brasileira de Engenharia Agrícola SBEA - Associação Brasileira de Engenharia Agrícola, Departamento de Engenharia e Ciências Exatas FCAV/UNESP, Prof. Paulo Donato Castellane, km 5, 14884.900 | Jaboticabal - SP, Tel./Fax: +55 16 3209 7619 - Jaboticabal - SP - Brazil
E-mail: revistasbea@sbea.org.br

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[1] *Corresponding author. Universidade Federal de Mato Grosso/ Cuiabá - MT, Brasil. E-mail: wellingtonagro@gmail.com