Pyramidal indentations as a microsite preparation for direct seeding ofPinus sylvestrisL.
作者:
Urban Bergsten,
期刊:
Scandinavian Journal of Forest Research
(Taylor Available online 1988)
卷期:
Volume 3,
issue 1-4
页码: 493-503
ISSN:0282-7581
年代: 1988
DOI:10.1080/02827588809382534
出版商: Taylor & Francis Group
关键词: Pinus sylvestris;seedling emergence;direct seeding;microsite;pyramidal indentations;site preparation;Sweden
数据来源: Taylor
摘要:
Four field experiments are described in which Scots pine (Pinus sylvestrisL) seed was sown in indentations made by pyramidal tools of different form (square base = 4 cm; angles from 44 to 90°; depths from 1 to 5 cm). The indentations were made in the ridges and furrows of a conventional harrow track. Overall, the best treatment was to make shallow indentations (tools: 90°‐1 or 2 cm; 67°‐1 or 2 cm; 44°‐1 cm deep) in ridges of the harrow track. In three experiments these indentations gave at least twofold seedling emergence compared with the control in ridges (seeds sown on soil surface). Soil texture in combination with precipitation affected the emergence results of the different indentation treatments. Indentations in ridges made by tools with a depth of 3 cm or even more gave good results if the soil was stable. For operational purposes the wear‐resistant form “90°‐1 or 2 cm” should be advantageous. The loss of seedlings, as measured up to the end of the third growing period, was significantly more rapid in furrows than in ridges.
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