萘乙酸对扁穗牛鞭草生长发育及地上部生物量的影响

doi:10.11733/j.issn.1007-0435.2015.03.009

草地学报 ›› 2015, Vol. 23 ›› Issue (3): 489-495.DOI: 10.11733/j.issn.1007-0435.2015.03.009

萘乙酸对扁穗牛鞭草生长发育及地上部生物量的影响

闫艳红, 李君临, 陈天峰, 罗燕, 张新全

四川农业大学动物科技学院, 四川雅安 625014

收稿日期:2014-06-30 修回日期:2014-12-05 出版日期:2015-06-15 发布日期:2015-07-02
通讯作者: 张新全
作者简介:闫艳红(1981-),女,山西交城人,博士,副教授,主要从事饲草栽培及加工研究, E-mail:yanyanhong3588284@126.com
基金资助:
现代农业产业技术体系建设专项(CARS-35-05);国家“十二五”科技支撑计划项目(2011BAD17B03)资助

Effects of Naphthalene Acetic Acid on the Shooting Growth and Aboveground Biomass of Hemarthria compressa

YAN Yan-hong, LI Jun-lin, CHEN Tian-feng, LUO Yan, ZHANG Xin-quan

Department of Grassland Science, College of Animal Science and Technology, Sichuan Agriculture University, Ya'an, Sichuan Province 625014, China

Received:2014-06-30 Revised:2014-12-05 Online:2015-06-15 Published:2015-07-02

摘要/Abstract

摘要：

以 “雅安”扁穗牛鞭草(Hemarthria compressa)为试材,研究不同的萘乙酸(NAA)浓度和浸泡时间对其生长发育及地上部生物量的影响。结果表明,NAA浓度对扁穗牛鞭草的生长速度、产量及第一茬刈割时的株高影响显著,其中低浓度NAA对上述性状有促进作用,高浓度则有抑制作用。此外,NAA浓度和浸泡时间对上述各性状的互作效应显著,以NAA浓度200 mg·L^-1,浸泡20 min处理后其生长表现最好,且增产效应持久,该处理为扁穗牛鞭草扦插繁殖最适宜的化学调控方法。

关键词: 扁穗牛鞭草, 无性繁殖, 萘乙酸, 地上部生物量, 浸泡时间

Abstract:

The application of biochemical stimulants is a simpler approach to enhance aboveground biomass, achieve higher productivity and lower costs than genetic modification. The impacts of naphthalene acetic acid on the growth speed and aboveground biomass of limpograss (Hemarthria compressa) were investigated by soaking the cuttings in different dosages (0~400 mg·L^-1) of NAA for different soaking durations (10~30 min). Limpograss “Ya'an”, released by the China Forage Registration Committee, was used in the Yangtze River that played an important role in animal husbandry and protection environment. It was found that the growth speed from 30 d to 58 d after planting, plant height, fresh aboveground biomass and dry aboveground biomass of the first harvest were significantly influenced by the NAA dosage. Treatment with the lower dosage of NAA increased these parameters, whereas higher dosage NAA suppressed these parameters. Similarly, fresh aboveground biomass and dry aboveground biomass of second harvest increased with the lower dosage (100 and 200 mg·L^-1) of NAA. Furthermore, the interactive effect between NAA dosage and soaking duration significantly affected the growth speed and aboveground biomass of limpograss. Overall, the results suggested that 200 mg·L^-1 NAA and 20 min soaking duration could be used to maximize growth speed and produce high aboveground biomass, the promotion of NAA-induced in the aboveground biomass of limpograss persisted for two years of 2011 and 2012.

Key words: Limpograss, Clonal propagation, Naphthalene acetic acid, Aboveground biomass, Soaking duration

中图分类号:

S543.9

闫艳红, 李君临, 陈天峰, 罗燕, 张新全. 萘乙酸对扁穗牛鞭草生长发育及地上部生物量的影响[J]. 草地学报, 2015, 23(3): 489-495.

YAN Yan-hong, LI Jun-lin, CHEN Tian-feng, LUO Yan, ZHANG Xin-quan. Effects of Naphthalene Acetic Acid on the Shooting Growth and Aboveground Biomass of Hemarthria compressa[J]. Acta Agrestia Sinica, 2015, 23(3): 489-495.

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萘乙酸对扁穗牛鞭草生长发育及地上部生物量的影响

Effects of Naphthalene Acetic Acid on the Shooting Growth and Aboveground Biomass of Hemarthria compressa

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