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Study on Seed Biological Characteristics Variation of Different Provenance of Ailanthus altissima

Song Lihua, Wang Yali (School of Agriculture, Ningxia University, Yinchuan 750021,China)  
This paper studied the preliminary research of biology characteristics of 8 provenance of the Ailanthus altissima Swingle. The survey indexes include one-thousand-seed weight, purity, water contents, germination rate, potential germination rate, germination speed, seed vigor index. The result showed that the difference of seed indexes of Ailanthus altissima Swingle provenance is obvious. The Lunan’s one-thousand-seed weight was 29.60g which was the maximum one, but the minimum is 20.33 g which was collected from Anhui (except seed from the Henan), and the average weight is 23.43g. The average germination rate is 49%, and the maximum germination rate is 79% collected from Lunan, but the minimum one is Anhui (21%). The average vigor index is 21.98, and Lunan’s seed vigor index is the maximum one, it is 33.53, but the minimum one is Anhui( 6.17). There isn’t obvious relativity between the seed wing’s size and seed weight. All the provenances were divided into 4 types by cluster analysis, and Lunan, Ludong, Ningxia, Luzhong were the first class provenances.
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