干旱区生态环境知识资源中心(Arid): 种子大小和干旱胁迫对文冠果幼苗生长的影响

Arid

	种子大小和干旱胁迫对文冠果幼苗生长的影响
其他题名	Effects of seed size and drought stress on growth of Xanthoceras sorbifolia seedlings
	郭有燕; 刘宏军; 余宏远; 赵娟; 郝永桢
来源期刊	西北农林科技大学学报. 自然科学版
ISSN	1671-9387
出版年	2016
卷号	44 期号:8 页码:143-147
中文摘要	【目的】研究种子大小和干旱胁迫对文冠果种子发芽率和幼苗生长的影响,为文冠果育苗和人工林培育提供理论依据。【方法】以文冠果大种子(单粒种子质量>1.0 g)、中等种子(单粒种子质量0.6~1.0 g)、小种子(单粒种子质量<0.6 g)为研究对象,采用室内完全随机试验方法,以聚乙二醇(PEG)-6000溶液模拟干旱胁迫对各水势条件下(对照,-0.2,-0.6 MPa)不同大小文冠果种子的发芽率及幼苗生长状况、生物量积累与分配进行研究。【结果】种子大小和干旱胁迫对文冠果种子发芽率有显著影响,大种子相对于中等种子和小种子,具有更高的发芽率;在0.2 MPa水分处理下,大种子发芽率为100%,中等种子和小种子发芽率分别为97.92%和94.79%;在- 0.6 MPa水分处理下,大种子发芽率为95.83%,而小种子发芽率为88.55%。种子大小和水分条件对文冠果幼苗生长量也有显著影响, 大种子相对中等种子和小种子幼苗有较大的生长量;随着水势的降低,不同大小种子起源的文冠果幼苗生长量逐渐降低。种子大小和水分条件对文冠果幼苗生物量积累及分配均有显著影响,大种子相对中等种子和小种子幼苗有更大的生物量积累。在不同水分条件下,大种子幼苗将更多的生物量投入到了叶片,而小种子幼苗将更多的生物量投入到根系。【结论】在干旱地区文冠果播种造林中,尽可能选择种粒质量大于1.0 g的种子以提高成活率。
英文摘要	【Objective】 This paper studied the effects of seed size and drought stress on seedling growth of Xanthoceras sorbifolia to provide basis for seedling and plantation cultivation of Xanthoceras sorbifolia. 【Method】 In this paper,a completely random experiment was conducted on the survival rate,growth, biomass accumulation and allocation of seeds with sizes of big (>1.0 g),medium(0.6 1.0 g) and small (<0.6 g) under three water conditions of control, 0.2 and 0.6 MPa. 【Result】 Seed size and water condition had significant effects on germination of X. sorbi folia seed. Big seeds had higher germination rate than medium and small seeds. With the water treatment of 0.2 MPa,the germination rate of big seeds was 100%,while those of medium and small seeds were 97.92% and 94.79%, respectively. Under the water treatment of 0.6 MPa, the germination rate of big seeds was 95.83%, while that of small seeds was 88.55%.Seed size and water condition also had significant effects on growth of X. sorbifolia seedlings,and the seedlings from big seeds had larger growth than the seedlings from medium and small seeds. With the decrease of water potential, growths of seedlings with different seed sizes decreased gradually. Biomass accumulation and allocation of seedlings were also significantly affected by seed size and water condition. The seedlings from big seeds had larger biomass allocation than the seedlings from medium and small seeds. Under different water conditions,the seedlings from big seeds allocated more biomass to leaf,while the seedlings from small seeds allocated more biomass to root.【Conclusion】 In afforestation for arid region,large seeds with size of >1.0 g were suggested to improve survival rate.
中文关键词	文冠果 ; 干旱胁迫 ; 种子大小 ; 幼苗生长 ; 生物量
英文关键词	Xanthoceras sorbi folia Bunge drought stress seed size seedling growth biomass
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Forestry
WOS研究方向	Forestry
CSCD记录号	CSCD:5764370
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235135
作者单位	郭有燕, 河西学院, 张掖, 甘肃 734000, 中国.; 余宏远, 河西学院, 张掖, 甘肃 734000, 中国.; 刘宏军, 张掖市种苗管理站, 张掖, 甘肃 734000, 中国.; 赵娟, 彭阳县草庙林业工作站, 彭阳, 宁夏 756500, 中国.; 郝永桢, 庆阳市正宁林业总场, 庆阳, 甘肃 745300, 中国.
推荐引用方式 GB/T 7714	郭有燕,刘宏军,余宏远,等. 种子大小和干旱胁迫对文冠果幼苗生长的影响[J],2016,44(8):143-147.
APA	郭有燕,刘宏军,余宏远,赵娟,&郝永桢.(2016).种子大小和干旱胁迫对文冠果幼苗生长的影响.西北农林科技大学学报. 自然科学版,44(8),143-147.
MLA	郭有燕,et al."种子大小和干旱胁迫对文冠果幼苗生长的影响".西北农林科技大学学报. 自然科学版 44.8(2016):143-147.