Claim · model-written summary
Without shelters, the American chestnut stock had 40% survival after the fourth year.
- Taxon
- Chestnutt0
- Material
- Americane2
- Outcome
- survival without shelterse2
- Value
- 40%e2
- Setting
- After the fourth yeare2
Not reportedGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorDirectionQualifier
Verbatim
e2“After the fourth year, survival without shelters declined for all chestnut stock types except for Chinese (80%): American 40%, BF 70%, BF 40%, and BF 55%”
t0“Chestnut Backcross Seeds and Seedlings”
Title
Survival and Growth of Chestnut Backcross Seeds and Seedlings on Surface Mines
J. Skousen; T. Cook; L. Wilson-Kokes; et al. Journal of Environmental Quality 2013. doi:10.2134/jeq2012.0368
Other claims from this paper (19)
- Observation First-year establishment from chestnut seeds averaged 81%.
- Observation Without shelters, the Chinese chestnut stock had 80% survival after the fourth year.
- Observation Without shelters, the BF backcross stock type had 70% survival after the fourth year.
- Observation Without shelters, a second BF backcross stock type had 40% survival after the fourth year.
- Observation Without shelters, a third BF backcross stock type had 55% survival after the fourth year.
- Observation Survival with shelters after the fourth year was 60% and only slightly better than without shelters.
- Observation Survival without shelters after the fourth year averaged 57%.
- Observation Height growth of chestnut stock types was not different.
- Observation Average height after the fourth year was 43 cm without shelters.
- Observation Average height after the fourth year was 56 cm with shelters.
- Observation Only six of 250 seeds sown in 2009 germinated.
- Observation Transplanted chestnut seedling survival after the third year was 85% in brown mine soil.
- Observation Transplanted chestnut seedling survival after the third year was 80% in gray mine soil.
- Association Seedling survival was significantly higher for American, Chinese and BF stock types (75%) than for BF and BF stock types (60%).
- Observation Seedling survival of the BF and BF stock types was 60%.
- Observation Height after the third season averaged 90 cm on brown mine soil.
- Observation Height after the third season averaged 62 cm on gray mine soil.
- Association Chestnut backcrosses showed no hybrid vigor and were not better than the parent stock in survival and growth.
- Recommendation Surface mines are promising sites for introducing blight-resistant chestnut backcross trees into the Appalachian forest.