An initial determination of the "Lifting window" for Ponderosa pine raised at Albuquerque, New Mexico
In 1980, a study was initiated on six national forests, four in Arizona and two in New Mexico, to determine the "lifting window" for southwestern ponderosa pine seedlings raised at Albuquerque, New Mexico. Seedlings (2-0), raised from seeds collected on the individual forests, were lifted and placed in cold storage monthly from November 1, 1980 to March 1, 1981. Beginning in March 1981, seedlings were planted on the individual forests in the zone from which seeds were collected. Initial results for each forest indicate the later the trees are lifted the higher the survival rate. Trees lifted March 1, had a survival rate of approximately 94% compared to 58% for trees lifted November 1. Planting is the surest method of establishing ponderosa pine (Pinus ponderosa var. scopulorum) in the Southwest (Arizona and New Mexico). For planting to be successful, however, healthy seedlings must be planted carefully on well-prepared sites protected from grazing (Heidmann et al. 1977, Schubert et al. 1970). Although past planting efforts have been hindered by the lack of a forest tree nursery in the Southwest, a new Forest Service nursery was established at Albuquerque, N. Mex., in 1977.
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Author(s): L. J. Heidmann
Publication: National Nursery Proceedings - 1982
Event:
Western Nurserymen's Conference
1982 - Medford, OR
