Seedling

(redirected from Seedlings)
Also found in: Dictionary, Thesaurus.

seedling

a very young plant produced from a seed

Seedling

 

a young plant raised from seed for subsequent transplanting in a permanent location.

Seedlings are used in vegetable and seed culture, floriculture, forestry, and the cultivation of certain industrial crops. The use of seedlings is most common in vegetable culture. The planting of seedlings makes it possible to shorten the period of vegetation in the open ground, to grow valuable crops and varieties having a long vegetative period in regions with a short summer, to obtain earlier vegetable harvests, and to economize on planting material (three to five times fewer seeds are needed than when sowing in the open ground).

Seedlings to be transplanted in open ground are raised in hotbeds, heated plastic-covered greenhouses, seedbeds, and tunnels and portable plastic-covered shelters. For subsequent transplantation in sheltered ground (winter and spring green-houses), seedlings are prepared in pots (10×10 or 12×12 cm) in winter shelf greenhouses and plastic-covered hotbeds. Seedlings set out in greenhouses in January and February are provided with supplementary electrical lighting, which accelerates production by seven to 15 days and increases the yield of cucumbers by 15–20 percent and the yield of tomatoes by 20–30 percent. Seedlings to be set out in glass-enclosed or plastic-covered spring greenhouses in March or April are grown in pots (8×8 or 10×10 cm) without supplementary lighting.

Cucumbers, early white cabbage, early cauliflower, vegetable marrow, eggplant, peppers, and melons are sown in pots. Tomatoes and lettuce are sown in flats but are transplanted into pots when the first true leaves appear. Seedlings of celery, onion, and medium and late varieties of cabbage are not raised in pots but directly in the ground of greenhouses or hotbeds.

To obtain high-quality seedlings, the plants must have a nutritive medium (soil mixture, nutrient solutions). The seeds must be disinfected, and protective measures against insect pests and disease must be taken. Before seedlings can be planted in the open ground, they must be hardened off, that is, exposed to lowered temperatures (at night and in overcast weather, to - 14°C), moderately watered, and treated with phosphorus-potassium fertilizers. In hotbeds the frames should be removed five to seven days before the plants are transplanted in order to improve the light regime.

REFERENCES

Markov, V. M. Ovoshchevodstvo. Moscow, 1966.
Rubtsov, M. I., and V. P. Matveev. Ovoshchevodstvo. Moscow, 1970.

Z. S. CHEKUNOVA


Seedling

 

a one- or two-year-old plant grown from seed in the sowing section of a fruit or forest nursery (without transplanting). The seedlings of fruit plants are used as stocks for propagating cultivated varieties; they are often called grafting stocks. In plant selection, hybrid seedlings are grown to develop new varieties. Tree seedlings are used for forestation.

seedling

[′sēd·liŋ]
(botany)
A plant grown from seed.
A tree younger and smaller than a sapling.
A tree grown from a seed.
References in periodicals archive ?
After careful review of cost structures, Weyerhaeuser made a strategic decision that the only way to approach orchard seedlings costs was to create a manufactured seed.
He also projects a savings of $200 per hectare--about $66 million a year to Chile's forestry business--based on boosted productivity and improved seedling quality.
The late Prime Minister Kakuei Tanaka established diplomatic relations with China in 1972 and sent 1,000 cherry tree seedlings to the Chinese government to celebrate the milestone.
Botanists Helen McKenny and Professor Jamie Kirkpatrick, studying moist forests in Tasmania, found that seedlings and saplings of several rainforest tree species were more abundant on fallen logs than on nearby soil.
They also compare the growth of infested and uninfested seedlings.
At the nursery, we were offered both rootbound pea seedlings and ones that were at a good stage for transplanting (neither overgrown nor rootbound).
We're grateful to our program business partners who cover the cost of shipping seedlings and to the growing number of schools that are getting involved with this important program.
In spite of the technological developments and the agricultural management of the seed, the optimal germination and placement of the produced seedlings have a key rule in agriculture, so that the success or failure in the production is dependent on the full and fast seed germination and the production of vigorous seedlings.
Keep seedlings in a bright, well-ventilated place and prick them out as soon as they've got true leaves.
The ideal time to move seedlings is whends they have developed their first pair of adult leaves.
Nisa Jalil, Vice President of Public & Government Relations for PT RRC, said, "From the very beginning of the operation, PT RRC educated local communities living around our work area towards providing the seedlings which will be used in the replanting program.