干旱区生态环境知识资源中心(Arid): 不同环境因素对砂蓝刺头种子萌发及出苗的影响

Arid

	不同环境因素对砂蓝刺头种子萌发及出苗的影响
其他题名	Effects of different environmental factors on seed germination and seedling emergence of Echinops gmelini
	王艳莉; 李新荣; 赵杰才; 齐欣宇
来源期刊	兰州大学学报. 自然科学版
ISSN	0455-2059
出版年	2018
卷号	54 期号:6 页码:783-789
中文摘要	分析了不同温度、降水和沙埋深度对冬型一年生植物砂蓝刺头种子萌发及幼苗出土的影响.结果表明:在光暗交替(12 h/12 h)条件下,砂蓝刺头种子萌发的最适温度是30 ℃/20 ℃,萌发率达到95.2%;其次是25 ℃/15 ℃,萌发率为57.78%.种子出苗的最适沙埋深度为1 cm,1~5 cm埋深种子萌发及出苗率随沙埋深度增加而减小;在幼苗能够出土的沙埋深度(0~4 cm),幼苗首次出土所需的时间随着沙埋深度的增加而延长.在1 cm埋深处,幼苗出土率随着单次降水量的增大显著增加;单次降水量6~24 mm时$\text{出苗率} < 25\% $,30 mm时出苗率达到46.7%.不同降水处理对不同沙埋深度种子出苗也具有显著影响;在1~4 cm埋深内,月降水量56 mm的出苗率显著大于36 mm,在1 cm埋深处出苗率分别为70.93%和42.28%.在沙坡头地区,降水分布较多的夏季和秋季早期是砂蓝刺头种子最适宜的萌发及出苗环境,这是一年生植物对干旱半干旱地区降水时空分布适应性的体现.
英文摘要	The effects of different temperatures,precipitation and sand buried depths on seed germination and seedling emergence of Echinops gmelini were analyzed and the results showed that the optimum germination condition of E.gmelini seed was at 30 ℃/20 ℃ in light/dark (12 h/12 h) and the germination rate was 95.2%,the percentage of seed germination was 57.78% at 25 ℃/15 ℃ condition.The optimum sand-burial depth for seed emergence was 1 cm,and the seed germination and seedling emergence rate at 1-5 cm depth decreased with the increase of the sand-burial depth.At the depth at which the seedling could be excavated (0-4 cm),the time required for the first excavation of the seedling was prolonged with the increase in the depth of the sand burial.At the depth of 1 cm,the seedling emergence rate increased significantly with the increase of one-off precipitation.${\rm{The\;seedling\;emergence\;rate}} < 25\% $ at one-off precipitation of 6-24 mm and seedling emergence was 46.7% after one-off precipitation of 30 mm.From 1-4 cm burial depth,the seedling emergence rate of 56 mm monthly precipitation was significantly higher than that of 36 mm,and the seedling emergence rate at 1 cm depth was 70.93% and 42.28%,respectively.Around the Shapotou region,the most suitable environment for seed germination and seedling emergence of E.gmelini is in summer and early autumn,when precipitation is distributed widely.This is also due to the adaptation of annual plants to the temporal and spatial distribution of precipitation in arid and semi-arid regions.
中文关键词	砂蓝刺头 ; 冬型一年生植物 ; 种子萌发 ; 幼苗出土 ; 沙埋深度 ; 降水
英文关键词	Echinops gmelini winter annual seed germination seedling emergence sand burial depth precipitation
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Plant Sciences
CSCD记录号	CSCD:6452329
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/378938
作者单位	王艳莉, 中国科学院西北生态环境资源研究院;;中国科学院大学, 中国科学院沙坡头沙漠研究试验站;;, 兰州;;, ;;北京 730000;;100049.; 李新荣, 中国科学院西北生态环境资源研究院, 中国科学院沙坡头沙漠研究试验站, 兰州, 甘肃 730000, 中国.; 赵杰才, 中国科学院西北生态环境资源研究院, 中国科学院沙坡头沙漠研究试验站, 兰州, 甘肃 730000, 中国.; 齐欣宇, 兰州大学资源环境学院, 兰州, 甘肃 730000, 中国.
推荐引用方式 GB/T 7714	王艳莉,李新荣,赵杰才,等. 不同环境因素对砂蓝刺头种子萌发及出苗的影响[J],2018,54(6):783-789.
APA	王艳莉,李新荣,赵杰才,&齐欣宇.(2018).不同环境因素对砂蓝刺头种子萌发及出苗的影响.兰州大学学报. 自然科学版,54(6),783-789.
MLA	王艳莉,et al."不同环境因素对砂蓝刺头种子萌发及出苗的影响".兰州大学学报. 自然科学版 54.6(2018):783-789.