期刊
FORESTS
卷 12, 期 5, 页码 -出版社
MDPI
DOI: 10.3390/f12050519
关键词
Betula pendula; Pinus sylvestris; field performance; deep planting; small-sized seedling
类别
资金
- Natural Resources Institute Finland [41007-00001300, 41007-0012500]
- Strategic Research Council of Academy of Finland (FORBIO project) [314224]
- Jenny ja Antti Wihuri Foundation
The study suggests that for small-sized silver birch and Scots pine container seedlings, the optimal planting depth is 6-8 cm. Deeper planting depth can increase the growth height of silver birch seedlings and reduce damage to Scots pine seedlings.
Deep planting is recommended in Nordic countries only for normal-sized container seedlings planted on mounds. Its effects on smaller-sized seedlings are poorly understood. We studied the effects of planting depth on the early field performance of small-sized silver birch (Betula pendula Roth) and Scots pine (Pinus sylvestris L.) container seedlings. Silver birch seedlings (mean height of 16 cm) were planted to depths of 3, 6 and 8 cm on spot mounds in May 2016. Scots pine seedlings (mean height of 9 cm) were planted to depths of 2, 5 and 8 cm on inverted mounds in September 2018 and May 2019. At the end of the first growing season, the deeper-planted birch seedlings were the tallest, as opposed to the deeper-planted Scots pine seedlings. However, the height differences between the planting depths were not apparent until the end of the second growing season in both tree species. Deeper planting decreased damage in Scots pine seedlings in the first growing season, which was not observed in silver birch. Based on our findings, small-sized Scots pine and silver birch seedlings can be planted safely at 6-8 cm planting depths, if at least 20% and 50% of their shoots, respectively, are above ground.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据