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草地学报  2015 

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, PP. 489-495

Keywords: 扁穗牛鞭草,无性繁殖,萘乙酸,地上部生物量,浸泡时间

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Abstract:

以“雅安”扁穗牛鞭草(Hemarthriacompressa)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200mg·L-1,浸泡20min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。

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