Abstract
The effects of duff of Engelmann spruce, subalpine fir, Douglas-fir and lodgepole pine as stratification media were studied on local seeds of these species. Stratification in mineral substrates provided a standard measure of the germination potential of the used seeds. The viability of all seeds tested was seriously damaged by stratification in unsterilized Engelmann spruce litter, and somewhat impaired by unsterilized litter of subalpine fir and Douglas-fir. These effects were controlled by either heat sterilization of the substrates or protection of the seeds with Orthocide 75, a commercial fungicide powder containing 75 percent Captan by weight, and were, therefore, attributed to differences in the microflora of the substrates.
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Claims 6
Claim · model-written summary
Unsterilized Engelmann spruce litter seriously damaged viability of the tested conifer seeds.
- Treatment
- stratification in unsterilized Engelmann spruce littere0
- Outcome
- viability of all seeds testede0
- Direction
- seriously damagede0
Not reportedComparator
Verbatim
e0“The viability of all seeds tested was seriously damaged by stratification in unsterilized Engelmann spruce litter”
t0“Conifers”
Claim · model-written summary
Unsterilized subalpine fir litter somewhat impaired conifer seed viability.
Not reportedComparator
Verbatim
e0“somewhat impaired by unsterilized litter of subalpine fir and Douglas-fir”
t0“Conifers”
Claim · model-written summary
Unsterilized Douglas-fir litter somewhat impaired conifer seed viability.
Not reportedComparator
Verbatim
e0“somewhat impaired by unsterilized litter of subalpine fir and Douglas-fir”
t0“Conifers”
Claim · model-written summary
Heat sterilization controlled the litter effects on seeds.
Not reportedComparator
Verbatim
e0“These effects were controlled by either heat sterilization of the substrates or protection of the seeds with Orthocide 75”
t0“Conifers”
Claim · model-written summary
Orthocide 75 seed protection controlled the litter effects.
Not reportedComparator
Verbatim
e0“These effects were controlled by either heat sterilization of the substrates or protection of the seeds with Orthocide 75”
t0“Conifers”
Claim · model-written summary
The seed effects were attributed to differences in substrate microflora.
Verbatim
e0“attributed to differences in the microflora of the substrates”
t0“Conifers”