Mais conteúdo relacionado Mais de Hudbay Minerals Inc. (15) Research on Mineland Reclamation1. Research on Mineland
Reclamation
Jeffrey S. Fehmi
School of Natural Resources
University of Arizona
11/12/2008 J. Fehmi 1
2. — Experimental design
◦ Soil types
Arkose, Gila, Glance
◦ Rainfall scenarios
High, Average, Low
◦ Amendments
None, Straw, Straw + Fertilizer
◦ Seed mixes
29 native species: 4 mixes
— Results and recommendations
Outline
11/12/2008 J. Fehmi 2
3. Arkose
Glance
Soil Types
Gila
11/12/2008 J. Fehmi 3
5. — Low rainfall — Summer
◦ 245 mm (9.6 in) ◦ 90 days
— Average rainfall ◦ Monsoon season
temperatures
◦ 384 mm (15.1 in)
— High rainfall — Between seasons
◦ 60 days
◦ 510 mm (20.1 in)
◦ Moderate temps
◦ No watering
— Winter
◦ 90 days
◦ Cool-season
temperatures
Rainfall/climate scenarios
11/12/2008 J. Fehmi 5
6. Average
Rank (low precip.
to high) Year (mm)
1 1995 228.9
2 2004 277.6
3 1989 280.3
4 1980 285.0 Low year
5 2002 292.5
6 2006 293.5
7 1996 305.9
8 1976 309.5
9 2005 311.2
10 2003 311.9
11 1986 336.4
12 1997 338.5
13 2001 344.4 1991 daily precipitation
14 1979 365.9
60
15 1991 398.4 Ave. year
16 1977 422.9 50
17 1994 423.0 Precipitation (mm) 40
18 1982 428.1
19 1985 431.7 30
20 1981 448.1
20
21 1993 449.8
22 1999 488.4 10
23 1992 500.4
0
24 2000 507.7
1/1/1991
1/15/1991
1/29/1991
2/12/1991
2/26/1991
3/12/1991
3/26/1991
4/9/1991
4/23/1991
5/7/1991
5/21/1991
6/4/1991
6/18/1991
7/2/1991
7/16/1991
7/30/1991
8/13/1991
8/27/1991
9/10/1991
9/24/1991
10/8/1991
11/5/1991
12/3/1991
10/22/1991
11/19/1991
12/17/1991
12/31/1991
25 1998 515.9
26 1987 522.2
27 1988 523.4
28 1990 532.3 High year
29 1978 569.2
30 1983 581.2
31 1984 735.5
average 411.6
11/12/2008 J. Fehmi 6
7. — None – bare soil.
— Straw
– equivalent to 2
tons per acre, tackified.
— Straw+ Fertilizer –
equivalent to 2 tons per
acre, tackified + slow
release fertilizer.
Amendments
11/12/2008 J. Fehmi 7
8. sideoats grama
blue grama
green sprangletop
Common Name Scientific Name Rothrock grama
whitethorn acacia* Acacia constricta sand dropseed
catclaw acacia* Acacia greggii sixweeks needle grama
red threeawn Aristida purpurea var. longiseta bottlebrush squirreltail
desert marigold
Mix 1
fourwing saltbush* Atriplex canescens big purple tansyaster
desert marigold Baileya multiradiata whitethorn acacia
cane beardgrass* Bothriochloa barbinodis skunkbush sumac
sixweeks needle grama Bouteloua aristidoides
cane beardgrass
sideoats grama* Bouteloua curtipendula Arizona cottontop
blue grama* Bouteloua gracilis sideoats grama
Rothrock grama* Bouteloua rothrockii blue grama
false mesquite Calliandra eriophylla tanglehead
sixweeks needle grama
Arizona cottontop Digitaria californica plains lovegrass
bottlebrush squirreltail Elymus elymoides desert senna
plains lovegrass* Eragrostis intermedia Mexican gold poppy
Mexican gold poppy Eschscholzia californica ssp. mexicana false mesquite
whitestem paperflower
tanglehead* Heteropogon contortus
curly mesquite Hilaria belangeri cane beardgrass
orange caltrop Kallstroemia grandiflora Arizona cottontop
prairie Junegrass Koeleria macrantha curly mesquite
red threeawn
green sprangletop* Leptochloa dubia
sixweeks needle grama
big purple tansyaster Machaeranthera tanacetifolia muttongrass
muttongrass Poa fendleriana prairie Junegrass
whitestem paperflower Psilostrophe cooperi gooseberryleaf globemallow
orange caltrop
skunkbush sumac* Rhus trilobata
catclaw acacia
desert senna Senna covesii fourwing saltbush
desert globemallow Sphaeralcea ambigua
gooseberryleaf globemallow Sphaeralcea grossulariifolia red threeawn
sand dropseed* Sporobolus cryptandrus sand dropseed
sideoats grama
Rothrock grama
Seed mixes
sixweeks needle grama
desert senna
desert marigold
desert globemallow
Mexican gold poppy
whitethorn acacia
11/12/2008 J. Fehmi 8
9. sideoats grama
blue grama
green sprangletop
Common Name Scientific Name Rothrock grama
whitethorn acacia* Acacia constricta sand dropseed
catclaw acacia* Acacia greggii sixweeks needle grama
red threeawn Aristida purpurea var. longiseta bottlebrush squirreltail
desert marigold
fourwing saltbush* Atriplex canescens big purple tansyaster
desert marigold Baileya multiradiata whitethorn acacia
cane beardgrass* Bothriochloa barbinodis skunkbush sumac
sixweeks needle grama Bouteloua aristidoides
cane beardgrass
sideoats grama* Bouteloua curtipendula Arizona cottontop
blue grama* Bouteloua gracilis sideoats grama
Rothrock grama* Bouteloua rothrockii blue grama
false mesquite Calliandra eriophylla tanglehead
Arizona cottontop Digitaria californica
sixweeks needle grama
plains lovegrass
Mix 2
bottlebrush squirreltail Elymus elymoides desert senna
plains lovegrass* Eragrostis intermedia Mexican gold poppy
Mexican gold poppy Eschscholzia californica ssp. mexicana false mesquite
whitestem paperflower
tanglehead* Heteropogon contortus
curly mesquite Hilaria belangeri cane beardgrass
orange caltrop Kallstroemia grandiflora Arizona cottontop
prairie Junegrass Koeleria macrantha curly mesquite
red threeawn
green sprangletop* Leptochloa dubia
sixweeks needle grama
big purple tansyaster Machaeranthera tanacetifolia muttongrass
muttongrass Poa fendleriana prairie Junegrass
whitestem paperflower Psilostrophe cooperi gooseberryleaf globemallow
orange caltrop
skunkbush sumac* Rhus trilobata
catclaw acacia
desert senna Senna covesii fourwing saltbush
desert globemallow Sphaeralcea ambigua
gooseberryleaf globemallow Sphaeralcea grossulariifolia red threeawn
sand dropseed* Sporobolus cryptandrus sand dropseed
sideoats grama
Rothrock grama
Seed mixes
sixweeks needle grama
desert senna
desert marigold
desert globemallow
Mexican gold poppy
whitethorn acacia
11/12/2008 J. Fehmi 9
10. sideoats grama
blue grama
green sprangletop
Common Name Scientific Name Rothrock grama
whitethorn acacia* Acacia constricta sand dropseed
catclaw acacia* Acacia greggii sixweeks needle grama
red threeawn Aristida purpurea var. longiseta bottlebrush squirreltail
desert marigold
fourwing saltbush* Atriplex canescens big purple tansyaster
desert marigold Baileya multiradiata whitethorn acacia
cane beardgrass* Bothriochloa barbinodis skunkbush sumac
sixweeks needle grama Bouteloua aristidoides
cane beardgrass
sideoats grama* Bouteloua curtipendula Arizona cottontop
blue grama* Bouteloua gracilis sideoats grama
Rothrock grama* Bouteloua rothrockii blue grama
false mesquite Calliandra eriophylla tanglehead
sixweeks needle grama
Arizona cottontop Digitaria californica plains lovegrass
bottlebrush squirreltail Elymus elymoides desert senna
plains lovegrass* Eragrostis intermedia Mexican gold poppy
Mexican gold poppy Eschscholzia californica ssp. mexicana false mesquite
whitestem paperflower
tanglehead* Heteropogon contortus
curly mesquite Hilaria belangeri cane beardgrass
orange caltrop Kallstroemia grandiflora Arizona cottontop
prairie Junegrass Koeleria macrantha curly mesquite
red threeawn
green sprangletop* Leptochloa dubia
sixweeks needle grama
big purple tansyaster Machaeranthera tanacetifolia
muttongrass Poa fendleriana
muttongrass
prairie Junegrass Mix 3
whitestem paperflower Psilostrophe cooperi gooseberryleaf globemallow
orange caltrop
skunkbush sumac* Rhus trilobata
catclaw acacia
desert senna Senna covesii fourwing saltbush
desert globemallow Sphaeralcea ambigua
gooseberryleaf globemallow Sphaeralcea grossulariifolia red threeawn
sand dropseed* Sporobolus cryptandrus sand dropseed
sideoats grama
Rothrock grama
Seed mixes
sixweeks needle grama
desert senna
desert marigold
desert globemallow
Mexican gold poppy
whitethorn acacia
11/12/2008 J. Fehmi 10
11. sideoats grama
blue grama
green sprangletop
Common Name Scientific Name Rothrock grama
whitethorn acacia* Acacia constricta sand dropseed
catclaw acacia* Acacia greggii sixweeks needle grama
red threeawn Aristida purpurea var. longiseta bottlebrush squirreltail
desert marigold
fourwing saltbush* Atriplex canescens big purple tansyaster
desert marigold Baileya multiradiata whitethorn acacia
cane beardgrass* Bothriochloa barbinodis skunkbush sumac
sixweeks needle grama Bouteloua aristidoides
cane beardgrass
sideoats grama* Bouteloua curtipendula Arizona cottontop
blue grama* Bouteloua gracilis sideoats grama
Rothrock grama* Bouteloua rothrockii blue grama
false mesquite Calliandra eriophylla tanglehead
sixweeks needle grama
Arizona cottontop Digitaria californica plains lovegrass
bottlebrush squirreltail Elymus elymoides desert senna
plains lovegrass* Eragrostis intermedia Mexican gold poppy
Mexican gold poppy Eschscholzia californica ssp. mexicana false mesquite
whitestem paperflower
tanglehead* Heteropogon contortus
curly mesquite Hilaria belangeri cane beardgrass
orange caltrop Kallstroemia grandiflora Arizona cottontop
prairie Junegrass Koeleria macrantha curly mesquite
red threeawn
green sprangletop* Leptochloa dubia
sixweeks needle grama
big purple tansyaster Machaeranthera tanacetifolia muttongrass
muttongrass Poa fendleriana prairie Junegrass
whitestem paperflower Psilostrophe cooperi gooseberryleaf globemallow
orange caltrop
skunkbush sumac* Rhus trilobata
catclaw acacia
desert senna Senna covesii fourwing saltbush
desert globemallow Sphaeralcea ambigua
gooseberryleaf globemallow Sphaeralcea grossulariifolia red threeawn
sand dropseed* Sporobolus cryptandrus sand dropseed
sideoats grama
Rothrock grama
Mix 4
Seed mixes
sixweeks needle grama
desert senna
desert marigold
desert globemallow
Mexican gold poppy
whitethorn acacia
11/12/2008 J. Fehmi 11
12. — Functional groups
◦ WSPG - Warm-season Perennial Grasses
◦ CSPG - Cool-season Perennial Grasses
◦ AG - Annual Grasses
◦ PF - Perennial Forbs
◦ AF - Annual Forbs
◦ SH - Shrubs
Species
11/12/2008 J. Fehmi 12
13. — All native species
— All
expected to occur or
currently occur on the site
— Derivedfrom the NRCS
Ecological Site Descriptions
for the area
— All commercially available
Species
11/12/2008 J. Fehmi 13
14. — 3
soil types X 3 rainfall scenarios X 3
amendments X 4 seed mixes = 108
treatment combinations
— 108 X 4 replications = 432 pots
Replication
11/12/2008 J. Fehmi 14
16. Green sprangletop (Leptochloa dubia) WSPG
Red threeawn (Aristida purpurea) WSPG
Blue grama (Bouteloua gracilis) WSPG
Arizona cottontop (Digitaria californica) WSPG
Curly mesquite (Hilaria belangeri) WSPG
Plains lovegrass (Eragrostis intermedia) WSPG
Bottlebrush squirreltail (Elymus elymoides) CSPG
Desert marigold (Baileya multiradiata) PF
Mexican gold poppy (Eschscholzia californica AF
False mesquite (Calliandra eriophylla) SH
Recommended species mix
11/12/2008 J. Fehmi 16
17. Tanglehead (Heteropogon contortus) WSPG
Sideoats grama (Bouteloua curtipendula) WSPG
Sand dropseed (Sporobolus cryptandrus) WSPG
Cane beardgrass (Bothriochloa barbinodis) WSPG
Desert senna (Senna covesii) PF
Alternate species
11/12/2008 J. Fehmi 17
18. Soil
Type
Grand
Arkose
Gila
Glance
Total
High
100
100
92
97
Rainfall
Ave
92
100
92
94
simulation
Low
100
83
75
86
Grand
Total
97
94
86
93
Table A1-1. Leptochloa dubia percent occurrence by pot.
Species analysis
11/12/2008 J. Fehmi 18
19. Soil
Type
Grand
Arkose
Gila
Glance
Total
High
0
17
33
17
Rainfall
Ave
0
33
25
19
simulation
Low
0
17
25
14
Grand
Total
0
22
28
17
Table A1-17. Acacia greggii percent occurrence by pot.
Species not recommended
11/12/2008 J. Fehmi 19
20. • Production
◦ How much aboveground biomass was
produced?
— Species richness
◦ How many species grew?
— Functional group richness
◦ How many functional groups occurred?
— Shannon’s diversity index
◦ How even was the abundance of species?
Soils, Rainfalls, Amendments
11/12/2008 J. Fehmi 20
21. 1,800
Aboveground dry weight (Kg/ha)
1,600
1,400
1,200
1,000
800
600
400
200
-
Arkose Gila Glance
Low RF Average RF High RF
Soils and rainfall
11/12/2008 J. Fehmi 21
22. 1,800
Aboveground dry weight (kg/ 1,600
1,400
1,200
1,000
800
ha)
600
400
200
-
None Straw Straw & Fert.
Low RF Average RF High RF
Amendments and rainfall
11/12/2008 J. Fehmi 22
23. — Thereare species sufficient to establish a
rich productive native plant community on
these materials.
— Some establishment occurs even in low
rainfall.
— Soils
vary in productivity, Arkose supports
limited richness and productivity.
— Straw aided community productivity.
Conclusions
11/12/2008 J. Fehmi 23