A new framework to assess the impact of land management on soil quality BIOFUNCTOOL®

Thoumazeau A.

1,2,3,4*

, Bessou C.

1

, Renevier M.S.

2,4,5

, Peerawat M.

4

, Heepngoen P.

3-4

,Trap J.

2

, Marichal R.

1

, Mareschal L.

2

, Decaëns T.

6

, Bottinelli

N.

7

, Prapatsorn P.

4

, Koonklang N.

4

, Sdoodee S.

8

, Chantuma P.

10

, Lawongsa P.

9

, Nimkingrat P.

9

, Jaillard B.

2

, Chevallier T.

2

, Suvannang N.

4

,

Sajjaphan K.

3

, Thaler P.

2,3

, Gay F.

2,3

and Brauman A.

2,4*

.

1_{Systèmes de pérennes, CIRAD, Montpellier, France;} 2_{UMR Eco&Sols, Montpellier, France;} 3_{HRPP, Kasetsart University, Bangkok, Thailand;} 4_{LMI LUSES, Land Development}

Department, Bangkok, Thailand; 5Université de Lausanne, Switzerland; 6CEFE, Montpellier, France;7IESS, IRD, Bondy, France; 8Prince of Songkla University, Songkhla, Thailand;

9_{Khon Kaen University, Khon Kaen, Thailand;} 10 _{Chachoengsao Rubber Research Center, Thailand.}

*Contact :

alexis.thoumazeau@cirad.fr; alain.brauman@ird.fr

BIOFUNCTOOL®

A new framework to assess the impact of land management on soil quality

A- Biofunctool®, what for?

How to assess

soil quality?

(Kibblewhite et al., 2008)

Reductionist

approach

_Integrated

_approach

C- Biofunctool® application

References : Kibblewhite, M.G., Ritz, K., Swift, M.J., 2008.Soil health in agricultural systems Philos. Trans. R. Soc. B-Biol. Sci. 363, 685–701.

Thoumazeau et al., Under Review, Biofunctool®: a new framework to assess the impact of land management on soil quality.

B- Biofunctool®, what is it?

In-field

assessment

Integrated

indicators

Cost-effective

indicators

1- Study site : Chachoengsao, Thailand

• Biofunctool® set of indicators is

sensitive to Land Uses and Land Use Changes

• The three soil function scores decrease with the perturbation intensity

• VESS and Lamina sensitivity to land management needs to be further investigated in other systems

• Biofunctool® is now experimented in other agrosystems and pedo-climatic conditions

2- Results

3- Discussion

C = cassava Y = young RP (10yr) M = medium RP (13-17yr) O = old RP (<24yr) F = forest

Rapid

assessment

Indicator name Measured

variables System Function assessed

AggSurf Aggregate stability

(0-2cm)

Erosion resistance

AggSoil Aggregate stability

(2-10cm)

Beerkan Infiltration rate _Infiltration

VESS Visual evaluation of

soil structure Soil structure

AEMNO3 NO3

- _{fixed on anion}

exchange membrane Nutrient dynamics

NminSoil

Soil available nitrogen (NO₃- _and

NH₄+₎

Nutrient dynamics

Cast Cast density _{Earthworm activity}

Lamina Bait Lamina _{Mesofauna activity}

POXC Permanganate

OXidizable Carbon Labile carbon

SituResp Basal soil respiration _{Microbial activity}

Disturbance gradient

Soil properties - Static variables

Soil functions - Dynamic variables