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作 者 ：赵玉^1,2;贾娜尔²;李海燕¹;刘影²;杨允菲¹

期 刊 ：应用生态学报 2009年 20卷 04期 页码：779-784

关键词：狗牙根；

摘 要 ：采用随机挖掘整个无性系的方法，在新疆伊犁河谷平原2年无人工管理的葡萄园撂荒地，对狗牙根无性系进行了大样本取样，定量分析了构件生长的规律.结果表明：在30个狗牙根无性系中，分株数平均为（272.6±186.6）个，其中营养分株占总分株数的82.3%，是生殖分株的4.3倍;无性系总生物量为(45.4±40.0) g，其中根茎占总生物量的54.4%，营养分株占21.0%，匍匐茎占14.8%，生殖分株占9.4%;根茎与匍匐茎的累计长度分别为(5.1±4.7) m和(3.3±3.4) m、着生的芽数分别为(291.5±246.8)和(78.8±87.4)个.根茎和匍匐茎芽数与无性系的营养分株、生殖分株、根茎和匍匐茎的数量性状之间均呈极显著的正相关关系(P<0.01)，表明在新疆伊犁河谷平原，狗牙根无性系主要以根茎芽实现其持续更新.

Abstract:By the method of randomly digging up whole ramet tuft while maintaini
ng natural integrity, large samples of Cynodon dactylon clones were collecte
d from a grape orchard abandoned for 2 years without any management in the Yili
River Valley Plain of Xinjiang, aimed to quantitatively analyze the growth patte
rns of their modules. The results showed that the average ramet number of test 3
0 clones reached 2726±1866, among which, vegetative ramets occupied 823%,
being 43 times higher than reproductive ones. The total biomass of the clones
was 454±400 g, in which, rhizomes accounted for 544%, while the vegetati
ve ramets, stolons, and reproductive ramets occupied 210%, 148%, and 94% o
f the total, respectively. The accumulative length of rhizomes and stolons reached
51±47 m and 33±34 m, while the bud number on stolons and rhizomes was
2915±2468 and 788±874, respectively. The bud number on stolons and rhizomes was positively correlated to the quantitative characters of vegetative rame
ts, reproductive ramets, stolons, and rhizomes (P<001), indicating that in
Yili River Valley Plain, C. dactylon clone could achieve and maintain its c
ontinuous renovation via rhizome buds.

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