Main problems in natural seed regeneration of pedunculate oak (Quercus robur L.) stands in Ukraine

Q4 Agricultural and Biological Sciences
M. Rumiantsev, V. Luk’yanets, S. Musienko, A. Mostepanyuk, Iryna Obolonyk
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引用次数: 11

Abstract

Abstract The literature review article sums up research experiences in natural seed regeneration in oak forests. In the past, the natural habitat for pedunculate oak (Quercus robur L.) was considerably wider than now. The downward trend in the area of oak stands is observed both in Ukraine and other European countries. In Ukraine, the area of natural oak stands of seed origin is decreasing by 2.0 thousand hectares each year. The most significant environmental factor in the emergence and normal growth of young oaks of seed origin is the light amount, which should reach at least 20% of the full sunlight. In addition to the light, the main factors contributing to the emergence of oak seedlings under forest canopies and in cutting areas are the oak fruiting and the litter and soil moisture. On the contrary, the excessive development of forest live cover with sedge and cereal vegetation, root competition from the parent trees, and a dense undergrowth were the hindering factors. In the forests of Ukraine, the largest number of natural seed reproduction of oak (more than 100 thousand stems ha−1) after the harvest year was recorded under the canopy of mature and overmature oak forests with a stocking of 0.6–0.7 and with 70 oaks in the stand species composition, growing in conditions of fresh and moist oak forests of Polissya and Forest-Steppe zones. Scientific and methodical guidelines for using natural reproduction of valuable species during the natural seed regeneration of oak stands were improved.
乌克兰有花序栎林种子自然更新的主要问题
摘要本文综述了橡胶林种子自然更新的研究经验。过去,有花序栎(Quercus robur L.)的自然生境比现在要宽得多。在乌克兰和其他欧洲国家都观察到橡树林面积的下降趋势。在乌克兰,有种子的天然橡树林面积每年减少2万公顷。影响种子源幼树出苗和正常生长的最重要的环境因素是光照量,光照量至少应达到全日照的20%。除光照外,栎树在林冠下和采伐区幼苗出苗的主要因素是栎树的结果、凋落物和土壤水分。与此相反,过度发展的莎草和谷类植被覆盖、来自母树的根系竞争和茂密的林下植被是阻碍其生长的因素。在乌克兰的森林中,在成熟和过成熟栎林的树冠下,在Polissya和森林草原地带新鲜潮湿的栎林条件下生长,收获年之后,橡树的自然种子繁殖数量最多(超过10万茎/公顷),其放养率为0.6-0.7,在林分物种组成中有70棵橡树。提出了在栎树林分种子自然再生过程中利用珍贵树种自然繁殖的科学、系统的指导方针。
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来源期刊
Forestry Studies
Forestry Studies Agricultural and Biological Sciences-Forestry
CiteScore
0.70
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0.00%
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