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当前位置: 首页 > 文章 > 围封对退化沙质草地地下繁殖体库恢复的影响 黑龙江畜牧兽医 2019 (13)
Position: Home > Articles > 围封对退化沙质草地地下繁殖体库恢复的影响 Heilongjiang Animal Science and Veterinary Medicine 2019 (13)

围封对退化沙质草地地下繁殖体库恢复的影响

作  者：
吕林有;赵艳;陈曦;刘慧林;关冰;罗祥志
单  位：
辽宁省沙地治理与利用研究所
关键词：
围封;退化;沙质草地;地下繁殖体库;种子库;芽库
摘  要：
为探明围封对退化沙质草地地下繁殖体库(种子库和芽库)恢复的影响,试验以长期放牧退化沙质草地为对照,通过种子萌发法和鉴定观测法,研究了不同围封年限(1年、3年和5年)的地下种子库和芽库物种种类、数量以及二者间转换变化的规律.结果表明:对长期放牧退化沙质草地实施围封措施能显著增加地下繁殖体库物种种类和数量,促进芽库向深层土壤扩展;围封对地下繁殖体恢复作用存在时间效应,随着围封年限的增加,土壤种子库一年生物种比例逐渐减小,多年生物种比例逐渐增加,而围封1年对芽库恢复作用不强,围封3~5年是地下繁殖体库存储转换地上植被群落的过渡期,外界适度刺激有利于地下芽库储备及芽体类型转换.
作  者：
LV linyou;ZHAO Yan;CHEN Xi;LIU Huilin;GUAN Bing;LUO Xiangzhi;Liaoning Institute of Sandy land Management and Utilization;Liaoning Grassland Supervision Station;
单  位：
LV linyou%ZHAO Yan%CHEN Xi%LIU Huilin%GUAN Bing%LUO Xiangzhi%Liaoning Institute of Sandy land Management and Utilization%Liaoning Grassland Supervision Station
关键词：
grazing exclusion;;degraded;;sandy grassland;;underground propagule banks;;seed bank;;bud bank
摘  要：
In order to explore the effect of grazing exclusion on the recovery of underground propagule banks(seed banks and bud banks)in degraded sandy grassland,the long-term grazing degraded sandy grassland was used as the control group and,seed germination method and identification observation method were adopted for the research on the species,the quantities and their transformation and change rule of underground seed banks and bud banks with different years of grazing exclusion(1 year,3 years and 5 years). The results showed that implementing grazing exclusion measures to the long-term grazing degraded sandy grassland could significantly increase the species and quantities of underground propagule banks,and enhance bud banks to the deep soil expansion. There was a time effect on the recovery of underground propagules. With the increase of grazing exclusion years,the proportion of annual species in soil seed bank was gradually decreasing while that of perennial species was increasing gradually. Howerer one-year grazing exclusion did not have strong effect on the recovery of bud banks. Three-to-five year grazing exclusion was the transition period of underground propagule bank storage to aboveground vegetation community. Moderate external stimulation could be beneficial to underground bud bank storage and bud type conversion.

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