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杉木种子X射线衬比检验方法的研究(PDF)

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

Issue:
1993年01期
Page:
16-20
Column:
研究论文
publishdate:
1900-01-01

Article Info:/Info

Title:
THE X-RAY CONTRAST METHOD FOR TESTING GERMINABILITY OF CHINESE FIR SEEDS
Article ID:
1000-2006(1993)01-0016-05
Author(s):
Chen Yousheng Wu Qiongmei Chen Zhijian Gao Handong Shen Yongbao
The Southern Tree Seed Inspection Centre, Ministry of Forestry
Keywords:
Chinese fir seed Germinability X-ray contrast method X-ray radiography
Classification number :
-
DOI:
10.3969/j.jssn.1000-2006.1993.01.003
Document Code:
A
Abstract:
Potassium iodide was found in a pilot experiment to be the most suitable contrast agent a-mong 15 chemicals for Chinese fir seeds. It was confirmed that the best X-ray contrast method for Chinese fir seeds was as follows; Seed sample was soaked in tapwater for 16 hours at 25°C. After superficially drying, the sample was treated with a 40% aqueous solution of KI for 2 hours. Afterwards, the seeds were washed in slowly running water for 5-6 min. The extra water was wiped off the seeds. Thereafter, the seeds were dried at 70°C for 4 hours. The dried seeds were then radiographed under the following condition: kV=20, mA=3, exposure time=60s, focus-film distance=25cm. A seed with fully developed endosperm and embryo free of impregnation was considered as viable seed, Ger-minability could be thus calculated as ratio of the number of viable seeds to the total number of seeds in a sample. The germinabilities (X) of 34 Chinese fir seed lots evaluated by X-ray contrast method were very close to their germination percents (7) by the standard method. The relationship is Y=-1. 5 + 0. 998X(r=0. 97).

References

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Last Update: 1900-01-01