Abstract: Objective]The objective of this article is to seek the influences of different enclosure years on the growth of sagebrush desert-Seriphidium transiliense.[Method]Two types of enclosure were set up re-spectively in four years and two years in the test,and the pasturable grassland in the whole year was taken as a control.In different treatment plots,respectively in the vigorous growth period of the plant,squaring stage and summer dormancy and flowering and fruiting period,the different fence years Seriphidium transiliense com-ponent of reproductive allocation were determined.[Result]Enclosure has an obvious effect on average plant height and cluster size of S.transiliense-edificatory,the average plant height and cluster size of four-year enclosure are higher than those without enclosure.And in different growth periods,there was a big difference in both average plant height and cluster size between four-year enclosure and non -closure (P<0.05 ), while the difference with two-year enclosure was not so big maybe because of a relatively short enclosure peri-od.Generally speaking,the overall distributive structure of stock biomass of S.transiliense was root >stem>leaf.As season changes,changes of biomass of root system,biomass of stem,biomass of leaf and total bio-mass of S.transiliense in different enclosure periods were basically the same,which meant that there was no influence of season change on biomass of each component,while different enclosure periods had certain influ-ence on biomass of each component.With the increase of enclosure period,there was obvious change in bio-mass of each component.However as season changes,there was no rule in variation trend of distribution of bi-omass of each component in different enclosure periods.Merely with the increase of enclosure period,distribu-tion of root biomass decreased and distribution of stem and leaf biomass increased.[Conclusion]As the season changes,the largest in above-ground biomass of S.transiliense is the type of four-year enclosure;biomass of root,biomass of stem,biomass of leaf and total biomass of S.transiliense are basically the same,while the largest in the ratio of root and stem is non-enclosure.Therefore,enclosure plays a significant role in impro-ving phytomass and lowering ratio of root and stem.

摘要： 【目的】研究不同围栏年限对蒿类荒漠建群种伊犁绢蒿生长的影响。【方法】试验设置围栏4年、围栏2年两个处理，以全年放牧草地作对照。在不同处理的样地里，分别在植物生长旺盛期、现蕾期、夏季休眠期及开花结实期，测定不同围栏年限下伊犁绢蒿构件的生殖分配。【结果】围栏封育对伊犁绢蒿的平均株高、株丛径均有显著影响，围栏4年的平均株高、株丛径均显著高于未围栏，而且在不同生长时期，平均株高、株丛径都表现为围栏4年与未围栏存在显著差异（P＜0.05）；而围栏2年差异不大，可能由于围栏时间比较短的缘故。整体上讲，伊犁绢蒿在种群生物量分配的总体格局是根＞茎＞叶。随着季节的变化，不同围栏年限中伊犁绢蒿根系生物量、茎生物量、叶生物量和总生物量变化基本一致，季节变化对各构件生物量的变化没有影响，而不同围栏年限对其有一定的影响，随着围栏年限的增加各构件生物量的变化明显。但随着季节的变化，不同围栏年限中各构件生物量的分配变化趋势没有规律，仅随着围栏年限的增加，根生物量分配减少，茎和叶生物量分配增加。【结论】随着季节的变化，伊犁绢蒿地上生物量都是围栏4年的最大，伊犁绢蒿根生物量、茎生物量、叶生物量和总生物量变化基本一致，而根茎比却是未围栏最大。所以围栏对提高植物生物量，降低根茎比有很大的作用。