The ratios of IAA to ABA and total sugar to total nitrogen are the main factors controlling the rooting of Pinus bungeana cuttings.The larger the ratio,the higher the rooting rate of cuttings.是什么意思_The ratios of IAA to ABA and total sugar to total nitrogen are the main factors controlling the rooting of Pinus bungeana cuttings.The larger the ratio,the higher the rooting rate of cuttings.在线翻译_英语_读音_用法_例句