中国农业科学院农业信息研究所 中国农学会
Agricultural Information Institute of CAAS China Association of Agricultural Science Societies
En
Ch
中国农业科学院农业信息研究所 中国农学会 主办

AI检索

订阅

返回顶部
当前位置: 首页 > 文章 > 播种深度和种子来源对羊草种苗出土的影响 干旱地区农业研究 2007,25 (5) 75-80
Position: Home > Articles > Effects of sowing depth and seed source on seedling emergence of Leymus chinensis Agricultural Research in the Arid Areas 2007,25 (5) 75-80

播种深度和种子来源对羊草种苗出土的影响

作  者：
刘桂霞;韩建国;赵霞
单  位：
中国农业大学草地研究所农业部草地植被恢复与重建重点开放实验室;河北大学生命科学学院;宁夏大学农学院
关键词：
羊草;播种深度;种子来源;种苗出苗;种子生态学
摘  要：
研究了5种播种深度下2种种子来源的羊草(野生和栽培)出苗情况。结果表明:播种深度和种子来源都显著影响羊草出苗率、出苗速率和种苗首次出土时间。羊草出苗率、出苗速率与播种深度成反比。播深1 cm时出苗最多,野生和栽培羊草的出苗率分别为84%和91%;覆土2 cm次之,分别为74.5%和84.5%;覆土6cm出苗最低,为33%和24.25%;不覆土与覆土1 cm的相比分别下降了50.25%和45.25%。野生和栽培羊草的出苗速率分别由覆土1 cm时的6.46和8.46下降到覆土6 cm时的2.41和1.65。种苗首次出土时间随着播种深度的增加而延长,播种深度1~2 cm时,两种羊草9~10 d都可出苗;不覆土的处理种苗首次出土所需时间最长,分别需要21.25 d和21 d。总体上,栽培羊草的出苗率和出苗速率高于野生羊草的出苗率和出苗速率,栽培羊草首次出苗时间早于野生羊草。
译  名：
Effects of sowing depth and seed source on seedling emergence of Leymus chinensis
作  者：
LIU Gui-xia1,2,HAN Jian-guo2,ZHAO Xia3 (1.College of Life Science,Hebei University,Baoding,Hebei 071002,China;2.China Agricultural University/Key Laboratory of Grassland Vegetation Restoration and Reconstruction,MOA,Beijing 100094,China; 3.Agricultural College of Ningxia University,Yinchuan,Ningxia 750021,China)
关键词：
Leymus chinensis;sowing depth;seed source;seedling emergence;seed ecology
摘  要：
In this paper,two seed sources(wild and cultivar) and five different sowing depths were used to study their effects on L.chinensis emergence.It may help to provide some practical management regimes for degraded grassland restoration and reconstruction.The results indicated that both the sowing depth and seed source had significant influence on L.chinensis seedling emergence(P<0.01),emergence rate and emergence time.The emergence percentage and rate declined as the sowing depth increased.The optimal sowing depth was 1～2 cm for the two seed sources L.chinensis. The highest emergence percentage for wild and cultivar L.chinensis was 84% and 91%,respectively,at 1cm sowing depth;the emergence percentage was the lowest to 6cm earth up,was 33% and 24.25%,respectively.The difference between them was 3～4 times.Both seeds of wild and cultivar L.chinensis could not emerge from sowing depth at 8cm.The highest emergence rate occurred at 1 cm depth,was 6.46(wild) and 8.46(cultivar),respectively;and the emergence rate was lowest at 6cm sowing depth(2.41,wild;1.65,cultivar).In general,the seedling emergence percentage and rate of cultivar's L.chinensis was higher than wild L.chinensis,while to 4～6 cm earth up,it got the contrary tendency.Too deep sowing depth or surface-sown delayed the first seedling emergence time.For the surface-sown treatment,the first emergence time was 21～21.25 d.However,at 1～2 cm depth,the first emergence time was 9-10d.Thus the control of sowing depth is critical in the restoration sites and,at times,may be more important than seed source.

相似文章

导出引用
计量
文章访问数: 10
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊

友情链接Friendly link
农业信息研究所Agricultural information institute 农业智能知识服务平台Agricultural intelligent knowledge service platform 农业学术服务平台Agricultural Knowledge Service System 中国知网CNKI 维普网VIP 万方WANFANG DATA
联系我们Contact us

电话Tell：010-82109652-808

邮箱E-mail：agrijournal@caas.cn

服务Service
关于我们About us 意见建议Opinions and suggest
版权说明Copyright
单位：中国农业科学院农业信息研究所 中国农学会 © 2017中国农业科学院农业信息研究所 ICP备案号：京ICP备09089781号-46