Effect of light intensity and girdling on seed production of Larix gmelinii var. japonica clones
2007
Uchiyama, K.(Hokkaido. Forest Research Inst., Bibai (Japan)) | Kuromaru, M. | Kita, K.
Effect of light intensity and girdling on seed production were studied on eight clones of Larix gmelinii var. japonica in the 30 year-old hybrid seed orchard in Hokkaido. In some clones, the amount of cones was increased by high light intensity, but not in others. Girdling increased the number of cones regardless of light intensity in a mast year. It is suggested that cone production per area is maximized at 50% of relative light intensity and present optimum tree density is 225 trees/ha in this hybrid seed orchard.
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