Resource allocation to vegetative and reproductive growth in relation to mast seeding in Fagus crenata
Resource allocation to vegetative and reproductive growth in relation to mast seeding in Fagus crenata
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DOI：
10.1016/j.foreco.2006.04.003
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发表时间：
2006-07
影响因子：
3.7
通讯作者：
Y. Yasumura;K. Hikosaka;T. Hirose
中科院分区：
文献类型：
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作者：
Y. Yasumura;K. Hikosaka;T. Hirose
研究了日本东北部一个森林中的毛茛（Fagus crenata）的营养生长和生殖生长的年际变化。在6年的研究中，有2个主要年份的树体同步产生大量的坚果。坚果生产是缺席或非常稀疏的其他4个非桅杆年。从落叶量估计的年产叶量在肥大和非肥大年份之间没有差异。同样，从年轮宽度评价径向茎生长不一定减少肥大年与非肥大年相比。径向增长仅在2个主要年份中的1个年份有所下降。树木也投入了大量的氮到生殖生长在肥大年，但肥大播种并没有减少氮投资到树叶或提高氮的再吸收从衰老的叶子。我们的结论是，桅杆播种不会对F。crenata树木，可能是由于资源储存在多年生组织。
Year-to-year variation in vegetative and reproductive growth was studied in Fagus crenata dominating a forest in Northeast Japan. Trees synchronously produced abundant nuts in 2 mast years during 6 years of study. Nut production was absent or very sparse in the other 4 non-mast years. Annual leaf production estimated from the amount of leaf litter did not differ between mast and non-mast years. Similarly, radial stem growth evaluated from tree ring width was not necessarily reduced in mast years compared with non-mast years. Radial growth decreased only in 1 of the 2 mast years. Trees also invested a substantial amount of nitrogen into reproductive growth in mast years, but mast seeding did not reduce nitrogen investment into the foliage or enhance nitrogen resorption from senescing leaves. We conclude that mast seeding does not place a strong impact on the canopy of F. crenata trees, probably owing to resources stored in perennial tissues.