| 摘要 |
<p>A rooted shoot of a rootstock (obtained from a stoolbed or from one or other sort of cutting) is planted in a nursery at relatively shallow depth (often about 8 inches). A scion is next grafted on to the rootstock and part of the rootstock above ground is wrapped in black polythene to produce localised blanching. The plant is then left in the nursery for root 'initials', and possibly some roots, to form under the polythene. After usually one year, the plant is moved to its final location in the field planted to a depth such as to immerse in the soil the stem section blanched during its period in the nursery. A similar method of initiating the desired root growth by cutting or scoring the basal section is also described.</p> |
