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Widianto, K. Hairiah, W.S. Dewi, Hascaryo, D. Saputra, F.K. Aini, D. Suprayogo, N.Khasanah and M. van Noordwijk L Litter layer, population density of earthworm.

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Presentation on theme: "Widianto, K. Hairiah, W.S. Dewi, Hascaryo, D. Saputra, F.K. Aini, D. Suprayogo, N.Khasanah and M. van Noordwijk L Litter layer, population density of earthworm."— Presentation transcript:

1 Widianto, K. Hairiah, W.S. Dewi, Hascaryo, D. Saputra, F.K. Aini, D. Suprayogo, N.Khasanah and M. van Noordwijk L Litter layer, population density of earthworm and soil macroporosity UNIV. BRAWIJAYA

2 Land Cover in East Java (Malang) Land Cover in Sumatra (West Lampung)

3 stem-flow through-fall rainfall cloud interception lateral outflow percolation recharge infiltrasi surface evaporation transpiration canopy water evaporation uptake Quick flow base flow { surface run-on sub- surface lateral inflow surface run-off Flow: tree Soil Hydrology function of ‘forest’: lanscape ?

4 ForestAgriculture: Monoculture / Polyculture Decomposition & Mineralisation Water Quality Run - off Other macrofauna Earthworm SOM Macroporosity & Water Infiltration Thickness of Surface Litter Slope and rainfall Protection to soil surface

5 Reduced Run-off IF: 1. Good and long soil cover ~ Litter thickness, slowly decomposed litter 2.High soil roughness ~ branches, understorey 3.Good water infiltration ~ enough soil macro pore

6 Purpose 1. Litter Litter Input Decomposition 2. Worm Population density Biomass 3. Soil Macroporosity Infiltration

7 West Lampung Malang SUMATRA JAVA

8 2.Multistrata coffee 3. Shaded coffee 1.Forest 4.Monoculture Coffee Survey

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10 1.Litterfall 2.Prunning Do litter composition of LUS differs one to another?

11 Annual Litter Input in Sumatra

12 LUS Litterfall Mg ha -1 yr -1 NLP (L+P)/N % Forest Multistrata C Shaded C Monoculture C Annual Litter input and its quality of various LUS in Java (L+P)/N > 10 low quality  slow decompose (Van Lauwe et al, 1997)

13 D ECOMPOSITION RATE OF LITTER

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15 Cast production weekly observed Measurement of Earthworm

16 Klitelum Dominant Spesies in Indonesian Agriculture : Pontoscolex corethrurus Prostomium Seta cocon Genetal pore & TP Anterior Taken by: Dewi Taken by: Fragoso Total: 11 species

17 Earthworm population Number anecic + endogeic Forest: Amynthas gracillis & Peryonix excavatus (bigger size) Coffee based: Dichogaster bolaui (smaller size)

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19 (Lavelle, 1997) (Van Noordwijk, 1985) Role of Earthworm and Roots on Macropore

20 Soil Macro porosity measurement (Methylen Blue), Feb. 2008

21 Macropore in- vertical plane Coffee monoculture Imperata grassland Coffee-based Agroforestry Forest 100 cm 30 cm 20 % 8 % 6 % 12 %

22 Measurement of water infiltration

23 Macroporosity and Infiltration

24 Earthworm (Pontoscolex) vs Soil porosity

25 Macropore = 0.78 Roots – 15.6 B/P non-Pontoscolex Litter thickness (R 2 = 0.98**)  Managing Crop Diversity is the key factor for maintaining Soil macropore Litter, earthworm, roots and Macropore Dewi et al., 2006)

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27 Worm size+po- pulation Worm Biomass SOM LITTER LAYER Litter Input (various shade trees in AF coffee based systems) Worm Activity Macro pore “SoilStructDyn” (as a part of WaNuLCAS model) Van Noordwijk et al, 2005

28 LUS Surface litter, Mg ha -1 C org relative to C org forest, % Macropore, % Earthworm Biomass, g m -2 MSMSMSMS Forest Multistrata Shaded Monokultur e Estimation of “SoilStruct Dyn” Modelling

29 1.Better litter layer improved soil macroporosity and Water infiltration 2.Improvement of macroporosity in AF ~ 2.Improvement of macroporosity in AF ~ Size of Earthworms (anecic group) 3.A combination of trees with slowly decomposing litter  protect the soil surface, and trees with deep root systems  create macroporosity

30 This activity was funded by ACIAR- ICRAF S.E. Asia, Ministry of Education (DIKTI- A2 Program) and CIFOR - Tropical Forest and Climate Change Adaptation (TroFCCA) project

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