根颈 meaning in English

[植物学] collar; collet

The part of a plant , usually at ground level , where the stem and roots merge
根颈通常位于地面的、茎和根汇合的植物的那部分
Then mulch the plants with soil after watering . 3 . watering and fertilizing in general , tree peonies do not like much water
栽植深度应使根颈与土面平或稍低为宜，不可过深或过浅。
In the first year , let tree peonies grow freely , many new buds will germinate . in the second year , when the new buds grow as high as 10cm , you can select several stronger buds as main stmes , other stems shall be cut off . every 2 years , you can select another one or two new buds as main stems , so that plants shape can develop and plim step by step
牡丹定植后，第一年任其生长，可在根颈外萌发出许多新芽俗称土芽第二年春天时，待新芽长至10m左右时，可从中挑选几个生长健壮充实分布均匀者保留下来，作为主要枝干俗称定股，余者全部除掉。