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Characterising and improving the deteriorating trends in soil physical quality under banana

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Rasiah, V., Armour, J. D., Moody, P. W., Pattison, A. B., Lindsay, S. J. and Florentine, S. (2009) Characterising and improving the deteriorating trends in soil physical quality under banana. Australian Journal of Soil Research, 47 (6). pp. 574-584. ISSN 00049573 (ISSN)

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Article Link(s): http://dx.doi.org/10.1071/SR08256

Abstract

Deterioration in soil physical quality under intensive tillage practices is a norm rather than an exception. The objectives of this study were to (i) evaluate total porosity (TP) as an indicator parameter to assess the impact of banana cropping on compaction and infiltration in soils, and (ii) assess the effectiveness of different interrow grass-covers in minimising the deteriorating trends. Depth-incremented TP under banana rows and interrows from 4 sites, corresponding forest sites, and from 3 interrow grass-cover treatments were computed from bulk density measurements. The TP results show the compacted depth ranged from 0.35 to 0.45m in banana rows and from 0.35 to 1.0m in the interrows. The TP in 0.10m depth increments decreased in the order: forest>rows>interrows, and was positively correlated with soil organic C (OC) and negatively with wheel traffic stress (WTS). The multiple regression analysis showed that 77% of the variability in TP was accounted for by clay+silt, OC, and WTS. We show that a threshold compaction index (DI t) of 0.810.83 can be estimated from TP regardless of the soil type. Depending on the soil type and the cultural practices followed, infiltration decreased from 0.75mm/s in rainforest to 0.23mm/s under banana in 1 soil type compared with 2.55mm/s in forest and 0.85mm/s under banana in another. After 18 months of interrow grass-covers we found the deterioration in TP was minimum under the indigenous grass-cover but not under the 2 improved species. We conclude the interrow grass-covers were effective in minimising WTS associated compaction and reduction in infiltration.

Item Type:Article
Business groups:Horticulture and Forestry Science
Keywords:Compaction index Grass-covers. Infiltration Row vs. interrow Total porosity Wheel traffic stress Bulk density measurement Cultural practices Forest sites Indicator parameters Multiple regression analysis Soil organic C Soil physical quality Soil types Tillage practices Clay minerals Compaction Deterioration Forestry Fruits Porosity Regression analysis Seepage Soil mechanics Wheels Soils fruit grass multiple regression physical property soil organic matter soil quality tillage traffic congestion vegetation cover Clay Degradation Stresses
Subjects:Agriculture > Agriculture (General) > Soils. Soil science > Soil chemistry
Agriculture > Agriculture (General) > Methods and systems of culture. Cropping systems
Plant culture > Fruit and fruit culture > Culture of individual fruits or types of fruit > Bananas
Plant pests and diseases
Agriculture > By region or country > Australia > Queensland
Deposited On:03 Nov 2022 04:34
Last Modified:03 Nov 2022 04:34

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