Phenological observations onLarix principis-rupprechtii Mayr. in primary seed orchard

Abstract

Through 5 years of phenological observations onLarix principis-rupprechtii Mayr. in primary seed orchard and studies on population and individuals of clones, the annual periodic phenological laws were revealed and the annual phenological periodic table was drawn up. The correlation between various phenophases, the air temperature and active accumulated temperature were analyzed and expounded. The authors also analyzed the similarities and differences of phenophases among clonal individuals as well as the blooming properties of male and female flowers at the same time. This study could provide theoretical reference for working out the production plan of improved varieties and other management measures in seed orchard ofLarix principis-rupprechtii.

Keywords

Larix principis-rupprechtii Mayr. / Primary seed orchard / Phenological observation / S718.45 / A

References

[1] Yuhua Fu, Rengxie Zhu, Xinbo Zhang Establishing and management techniques ofLarix principis-rupprechtii Mayr in seed orchard [J]. Shanxi Forestry Science and Technology, 1989, 4: 1-4.

[2] Yuhua Fu, Rengxie Zhu, Xinbo Zhang Morphological variation and natural types ofLarix principis-rupprechtii Mayr. plus trees [J]. Shanxi Forestry Science and Technology, 1989, 4: 5-9.

[3] Yuhua Fu Studies on flowering properties ofLarix principis-rupprechtii Mayr. plus trees [J]. Shanxi Forestry Science and Technology, 1989, 4: 22-29.

[4] Wuru Fu Mathematical Statistics [M], 1980 Beijing: Chinese Forestry Press 235-236.

[5] Yuhua Fu Studies on growing properties of crown of plus trees clones ofLarix principis-rupprechtii Mayr. [J]. Shanxi Forestry Science and Technology, 1989, 1: 10-12.

[6] Jiuling Wang A comprehensive forestry technology of China [M], 1992 Beijing: Science and Technology Publishing House 46-46.

[7] Kezhen Zhu, Minwei Wan Phenology [M], 1983 Beijing: Science Press 20-25.

[8] Songyun Zhang Proceedings on applied genetic improvement of key needle-leaved tree species [M], 1990 Beijing: Chinese Forestry Press 43-46.