如果新梢生长很快,则根系生长显著减慢.If shoots grow rapidly the root growth rate decreases markedly.生长素主要是从旺盛生长新梢上正在发育的幼叶产生出来.Auxins are produced mainly by young developing leaves on actively growing shoots.以冬季扦插之发根与新梢生长情形最好.Rooting abili...

“新梢”的英语可以翻译为：young sprout ...