cultural practices for native forb seed production...hotrock penstemon 8.7 in 4.8 in 0 in water...
TRANSCRIPT
Cultural Practices for Native Forb Seed Production
Oregon State University, Malheur Exp. Sta. Ontario
AuthorsAuthorsClint Shock, Erik Feibert, M. SaundersClint Shock, Erik Feibert, M. Saunders
Joey Ishida, and Corey RansomJoey Ishida, and Corey Ransom
Why try SDI irrigation?Why try SDI irrigation?1.1. Cultivated seed production Cultivated seed production
requires dependable production. requires dependable production.
2.2. Excess water stress has hurts Excess water stress has hurts flowering and seed set.flowering and seed set.
3.3. Total water requirements are Total water requirements are unknown, but probably are low. unknown, but probably are low.
4.4. Furrow and sprinkler irrigation Furrow and sprinkler irrigation encourage weeds and disease.encourage weeds and disease.
ObjectivesObjectives
Test SDI for stable, efficient Test SDI for stable, efficient native forb seed production native forb seed production using small amounts of using small amounts of supplemental irrigation water.supplemental irrigation water.
1/10 acre of 7 Species1/10 acre of 7 SpeciesE. umbellatumE. umbellatum, Sulfur, Sulfur--flower buckwheat flower buckwheat
P. acuminatusP. acuminatus,, Sand penstemon Sand penstemon P. deustusP. deustus, Hot rock penstemonHot rock penstemonP. speciosusP. speciosus, Showy penstemonShowy penstemon
LomatiumLomatium grayigrayi, Gray , Gray biscuitrootbiscuitrootL. dissectum,L. dissectum, Fernleaf biscuitroot Fernleaf biscuitroot L. triternatum,L. triternatum, NineleafNineleaf biscuitrootbiscuitroot
DesignDesignDrip tape Drip tape burriedburried 12 inches deep12 inches deep
Tape 5 feet apartTape 5 feet apart
TT--tape TSX 515tape TSX 515--1616--340340
3030--inch beds, seed drilled 15” to inch beds, seed drilled 15” to each side of the tape each side of the tape
Forbs established in 2005 using Forbs established in 2005 using 5.5”, for 2006 0, 4.8, 8.7 inches.5.5”, for 2006 0, 4.8, 8.7 inches.
Oct Nov Dec Jan Feb Mar Apr May Jun Jul0
1
2
3
4
Prec
ipita
tion
(inch
es)
Typical and actual rainfall
2005 - 2006 average
Penstemon acuminatusSand penstemon
138 153 156 179 187
Day of year
10
15
20
25
30
Volu
met
ric w
ater
con
tent
, %
Soil water content for the 0 - 36 inch depth forPenstemon acuminatum
2 in 1 in 0 in
flowering ends harvest
8.7 in 4.8 in 0 inWater applied in 4 irrigations
0
100
200
300
400
500
600
700Se
ed y
ield
(lb/
acre
)
Seed yield in response to irrigation forPenstemon acuminatum
Penstemon speciosusRoyal or Sagebrush penstemon
138 153 156 179 187Day of year
10
15
20
25
30
Volu
met
ric w
ater
con
tent
, %Soil water content at the 0 - 36 inch depth for
Penstemon speciosus
2 in 1 in 0 in
mid flowering
8.7 in 4.8 in 0 inWater applied in 4 irrigations
0
100
200
300Se
ed y
ield
(lb/
acre
)
Seed yield in response to irrigation forPenstemon speciosus
Penstemon deustusHotrock penstemon
8.7 in 4.8 in 0 inWater applied in 4 irrigations
0
200
400
600
800
1000
1200
1400Se
ed y
ield
(lb/
acre
)
Seed yield in response to irrigation forPenstemon deustus
Eriogonum umbellatumEriogonum umbellatumSulfur buckwheatSulfur buckwheat
138 153 156 179 187
Day of year
10
15
20
25
30
Volu
met
ric w
ater
con
tent
, %Soil water content at the 0 - 36 inch depth for
Eriogonum umbellatum
2 in 1 in 0 in
flowering starts
8.7 in 4.8 in 0 inWater applied in 4 irrigations
0
100
200
300
400Se
ed y
ield
(lb/
acre
)
Seed yield in response to irrigation forEriogonum umbellatum
a
b
b