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Biochar for Sand-Based Root-Zone Modification NICK CHRISTIANS SHANE BROKHOFF IOWA STATE UNIVERSITY.

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Presentation on theme: "Biochar for Sand-Based Root-Zone Modification NICK CHRISTIANS SHANE BROKHOFF IOWA STATE UNIVERSITY."— Presentation transcript:

1 Biochar for Sand-Based Root-Zone Modification NICK CHRISTIANS SHANE BROKHOFF IOWA STATE UNIVERSITY

2 BIOCHAR AND TURF Sand-based turfgrass root-zone United States Golf Association (USGA)

3 BIOCHAR AND TURF turf Sand-based turfgrass root-zone United States Golf Association (USGA)

4 Why biochar and turf… 4 Root-zone mix Intermediate layer Coarse gravel Drainage tile (USGA, 1993) sand:peat moss 90:10 or 80:20

5 OBJECTIVES Sand and biochar root-zone mix: soil water retention properties saturated hydraulic conductivity rooting depth of creeping bentgrass (Agrostis stolonifera L.) chemical properties

6 switchgrass (Panicum virgatum FAST PYROLYSIS Center for Sustainable Environmental Technologies (CSET) at Iowa State University BIOCHAR

7 Six volume-to-volume mixtures of biochar and sand 7 Treatments Treatment Sand : Char : : : : : : 25

8 8

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11 11 K sat of Six Biochar and Sand Treatment Mixtures (n=4)

12 12

13 13

14 Leachate –Electroconductivity (EC) –pH –Total organic carbon (TOC) –Nutrient analyses Soil –Nutrient analyses 14 Chemical properties

15 15 LEACHATE pHpH Biochar percentage (v/v)

16 Biochar percentage (v/v) LEACHATE P

17 17 Soil K Biochar percentage (v/v) LEACHATE K

18 Biochar increases soil water retention Biochar decreases saturated hydraulic conductivity Biochar decreases rooting depth of creeping bentgrass in media containing more than 10% (v/v) biochar Biochar increases leachate EC, TOC; provides essential nutrients 18 Conclusions


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