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| − | {{otheruses4|the plant propagation technique|the OSI Reference Model (Communications systems)|OSI Model}} | + | {{honor_header|2|1976|Nature|General Conference}} |
| − | '''Layering''' is a means of [[plant propagation]] in which a portion of an aerial [[Plant stem|stem]] grow [[root]]s while still attached to the parent plant and then detaches as an independent plant. Layering has evolved as a common means of vegetative propagation of numerous species in natural environments. Layering is also utilised by horticulturists to propagate desirable plants.
| + | ==1. Name at least five house plants raised for their foliage.== |
| − | | + | ==2. Name three house plants raised for their flowers.== |
| − | Natural layering typically occurs when a branch touches the ground, whereupon it produces [[adventitious roots]]. At a later stage the connection with the parent plant is severed and a new plantet is produced as a result.
| + | ==3. Name three house plants adapted to direct sunlight, dry soils, and very moist soils.== |
| − | | + | ==4.Most house plants like a 65-to 75-degree (18 C - 22 C) temperature. Name one that requires a cool room (45 to 55 degrees F.) (7 C - 13 C).== |
| − | The horticultural layering process typically involves wounding the target region to expose the inner stem and optionally applying [[auxin|rooting compound]]s. In '''ground layering''', the stem is bent down and the target region buried in the soil. This is done in [[nursery (horticulture)|plant nurseries]] in imitation of natural layering by many plants such as [[bramble]]s which bow over and touch the tip on the ground, at which point it grows roots and, when separated, can continue as a separate plant. In either case, the rooting process may take from several weeks to a year.
| + | ==5.Prepare a special potting mix soil including at least 3 different ingredients. Select two house plants from requirement two and grow them in this soil for three weeks.== |
| − | | + | ==6.How much light does an African violet need? Where in the house is the best place to grow them? Grow two or more African violets.== |
| − | Layering is more complicated than taking [[Cutting (plant)|cuttings]], but has the advantage that the propagated portion can continue to receive [[water]] and [[nutrient]]s from the parent plant while it is forming roots. This is important for plants that form roots slowly, or for propagating large pieces.
| + | ==7.All gesneriads need approximately the same growing conditions. Where do they come from originally? What kind of temperature, light, and humidity do they need?== |
| − | | + | ==8.Name two house plants that can be propagated from leaves, stem sections or divisions. Select one plant from requirement two above, experiment with each of these methods of propagation and keep them growing for three months.== |
| − | ==Ground layering== | + | ==9. What is a Bonsai?== |
| − | Ground layering is the typical propagation technique for the popular [[Malling-Merton]] series of [[Cloning|clonal]] [[apple]] rootstocks in which the original plants are set in the ground with the stem nearly horizontal, which forces side buds to grow upward. After these are started the original stem is buried up to the tip. At the end of the growing season, the side branches will have rooted, and can be separated while the plant is dormant. Some of these will be used for [[grafting]] rootstocks, and some can be reused in the nursery for the next growing season's crop.
| + | ==10. What is humidity? How is it important to house plants?== |
| − | | + | ==11. Below is a lists of plants to chose from for requirement five and eight above:== |
| − | ==Air layering== | + | ===a. Narcissus=== |
| − | In '''air layering''' (or marcotting), the target region is wounded and then surrounded in a moisture-retaining wrapper such as [[sphagnum moss]], which is further surrounded in a moisture barrier such as [[polyethylene]] film. Rooting hormone is often applied to encourage the wounded region to grow roots. When sufficient roots have grown from the wound, the stem from the parent plant is removed and planted.
| + | ===b. Aspidistra=== |
| − | | + | ===c. Philodendron=== |
| − | == External links == | + | ===d. Aluminum plant=== |
| − | * [http://aggie-horticulture.tamu.edu/extension/ornamentals/airlayer/airlayer.html Information and illustrated step-by-step instructions for air layering]
| + | ===e. Daffodil=== |
| − | | + | ===f. Sanseveria=== |
| − | [[Category:Gardening]]
| + | ===g. Boston fern=== |
| − | [[Category:Agriculture]]
| + | ===h. Piggy-back plant=== |
| − | [[Category:Plant reproduction]]
| + | ===i. Bird's nest fern=== |
| − | [[Category:Horticulture]]
| + | ===j. Caladium=== |
| − | | + | ===k. Gloxinia=== |
| − | [[de:ABSEEN]]
| + | ===l. Spider plant=== |
| − | [[fr:MITCHELL]]
| + | ===m. Geranium=== |
| − | [[it:MarGAL]]
| + | ===n. Maidenhair fern=== |
| − | [[ja:取り木]] | + | ===o. Begonia=== |
| | + | ===p. Ficus=== |
| | + | ===q. Tulip=== |
| | + | ===r. Iris=== |
| | + | ===s. Crocus=== |
| | + | ===t. Coleus=== |
| | + | ===u. Hyacinth=== |
| | + | ==References== |
| | + | [[Category:Adventist Youth Honors Answer Book|{{SUBPAGENAME}}]] |
