Estimated amount of carbon accumulation of hybrid larch in three 31-year-old progeny test plantations

Abstract

Hybrids generated by crossing Kuril larch (Larix gmelinii var. japonica) and Japanese larch (L. kaempferi) are expected to have high carbon accumulation ability because of fast growth and high wood density in Hokkaido, Japan. We estimated the amount of carbon accumulation of the hybrid larch in three progeny test plantations consisting of 21 full-sib families and compared the results to the carbon accumulation of open-pollinated progenies of Japanese larch plus-trees (improved Japanese larch). Geneenvironment interactions were not observed for tree height and diameter at breast height but were seen for wood density (area-weighted density, AWD). The amount of carbon accumulated per unit area (C stand ) positively correlated with the stand volume. The AWD did not correlate with the C stand ; therefore, families with high wood density can be selected independent of the C stand . The C stand of the best full-sib family, female parent half-sib family, and male parent half-sib family at three sites were 106.1, 84.6, and 93.2 Cton•ha −1 , respectively. All these values exceed the mean for the improved Japanese larch, which has a C stand value of 82.5 Cton•ha −1 .

Survival rate and shoot growth of grafted Dahurian larch (Larix gmelinii var. japonica): a comparison between Japanese larch (L. kaempferi) and F1hybrid larch (L. gmelinii var. japonica × L. kaempferi) rootstocks

“…In northern Japan, Japanese larch (Larix kaempferi) has been widely planted for use as pit props in coal mines since the early decades of the 20 th century (Kita, 2013;Kita et al, 2009). It is not a native species in northern Japan and suffers from several types of abiotic and biotic stress (Ryu et al, 2009;Koike, 2009).…”

“…It is not a native species in northern Japan and suffers from several types of abiotic and biotic stress (Ryu et al, 2009;Koike, 2009). Moreover, its timber is of low quality due to strong twisting in the trunk and high concentration of resin (Kita et al, 2009). Through the efforts of the forest tree breeding and timber engineering programs at the Forest Products Research Institute, Hokkaido Research Organization (HRO), new timber technologies and processes have been successfully developed, and a new F 1 hybrid larch (L. gmelinii var.…”

Effects of nitrogen loading under low and high phosphorus conditions on above- and below-ground growth of hybrid larch F1 seedlings

“…As a result, F1 not only shows high tolerance to vole feeding and shoot blight disease but also has a higher initial growth rate and high capacity for carbon absorption under present environmental conditions such as CO2 concentration, temperature, rainfall etc. (Miyaki 1990, Kita et al 2009, Ryu et al 2009). As the Larix species is broadly distributed across east Eurasian regions (Abaimov et al 2002), F1 is one of the promising new afforestation species for CO2-fixation, storage and timber production.…”

Growth of Japanese and hybrid larch seedlings grown under free-air O₃ fumigation—an initial assessment of the effects of adequate and excessive nitrogen

“…Ryu et al, 2009;Japanese Forestry Agency, 2010). A hybrid larch F 1 (hereafter F 1 ) was developed to overcome the weak points of the Japanese larch (Larix kaempferi) (Kita et al, 2009;Ryu et al, 2009). However, the responses of the F 1 to combination effects of elevated O 3 (eO 3 ) and excessive N deposition are still unknown (Akimoto, 2003;Ohara et al, 2007;Watanabe and Yamaguchi, 2011;Koike et al, 2012).…”