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麻疯树开花数量大小及其生态适应性(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2010年06期
Page:
28-32
Column:
研究论文
publishdate:
2010-11-30

Article Info:/Info

Title:
Study on the floral quantity size and ecological adaptability of Jatropha curcas
Author(s):
LIU Fangyan12 LI Kun1* ZHANG Chunhua1 LUO Changwei1 WANG Xiaoqing1 CUI Yongzhong1
1.Desert Ecosystem Station in Yuanmou County, State Forestry Administration of China, Research Institute of Resources Insects, CAF, Kunming 650224, China; 2. National Engineering Laboratory for Tree Breeding, Key Laboratory for Genetics and Breeding of Forest Trees and Ornamental Plants of Ministry of Education, Beijing Forestry University, Nature Reserve Research and Assessment Center of State Forestry Administration, Beijing 100083, China
Keywords:
Jatropha curcas floral quantity polygamous inflorescence ecological adaptability dryhot valley
Classification number :
S716.3;S792
DOI:
10.3969/j.jssn.1000-2006.2010.06.007
Document Code:
A
Abstract:
Random sampling and tracking investigation were applied to determine comparatively the floral quantity, size and the fruiting rate of Jatropha curcas during the first two flowering of semifield in different site conditions. The results showed that, male inflorescence usually produced on the old branches, and polygamous inflorescence produced on the 1yearold twigs. The number of polygamous inflorescence is 1.8—17 times than that of male inflorescences. There are a few female flowers, usually varies from 1 to 25 per inflorescence, and a large number of male flowers, usually 10—20 times than that of the female ones within polygamous inflorescences. The fruiting rate of J.curca is relatively stable and high, commonly more than 90 % higher than the average, and the number of seeds per fruit set varies from 2.6—2.9. Site conditions and flowering order could significantly affect the number of male inflorescence, polygamous inflorescence, and the number of male and female flowers within polygamous inflorescence. It would be a very useful strategy of reproduction for J.curcas to produce a large number of polygamous inflorescences, for that it could ensure the female function strengthened, and the suitable function of male inflorescence and male flowers in polygamous inflorescences were probably more important than that of reproduction. The flora size and the environment of pollination of J.curcas were closely related, and a large amount of male flowers were very useful to attract pollinators.

References

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Last Update: 2010-12-27