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温度对发草种子萌发和幼苗生长的影响

作  者:
张睿昕;鱼小军;邓利强;薛鑫
单  位:
甘肃农业大学草业学院草业生态系统教育部重点实验室中-美草地畜牧业可持续发展研究中心
关键词:
发草;种子萌发;温度
摘  要:
为了探讨发草种子的萌发特性,研究了不同恒温和变温对发草种子萌发和幼苗生长的影响。结果显示,发草种子的千粒质量为0.274 g。较高温度有利于发草种子萌发,较低温度萌发速率较慢。25/15℃变温条件下发芽率最高可达98%,为发草种子最适宜萌发温度;10℃下发芽率最低,为61%。发草种子标准发芽试验初次和末次统计时间分别为第7 d和15 d;25℃条件下芽长最长为2.63 cm;25/15℃条件下根长最长,达到1.29 cm;30/5℃条件下的芽长、根长最短,分别为0.31 cm和0.25 cm。
译  名:
Effects of temperature on Deschampsia caespitosa seed germination and seedling growth
作  者:
ZHANG Rui-xin,YU Xiao-jun,Deng Li-qiang,XUE Xin,MAN Yuan-rong (College of Grassland Science,Gansu Agricultural University;Key Laboratory of Grassland Eco-System;Sino-U.S.Centers for Grazing land Ecosystem Sustainability;Lanzhou,Gansu,730070,China)
关键词:
Deschampsiacaespitosa;seed germination;temperature
摘  要:
In order to reveal Deschampsia caespitosa seeds germination characteristics,the effect of constant and alternative temperatures on seeds germination and seedling growth were conducted.The result showed that the 1000-grain weight of D.caespitosa seeds was 0.274 g.Higher temperature promoted germination while lower limited.The optimal germination temperature was 25/15 ℃,at which germination percentage was 98%.Germination percentage was 61% when temperature was 10 ℃.The first and final counting time for standard germination testing of D.caespitosa seed is the 7th and the 15th day.The highest seedling present at 25 ℃,it reached to 2.63 cm while longest and shortest root appeared at 25/15 ℃,it was 0.31 cm and 0.25 cm respectively.

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