 |
HolySword said:
FOOLS!
A hardy annual, some varieties of selada can be overwintered even in relatively cold climates under a layer of straw, and older, heirloom varieties are often grown in cold frames.[25] Lettuces meant for the cutting of individual leaves are generally planted straight into the garden in thick rows. Heading varieties of lettuces are commonly started in flats, then transplanted to individual spots, usually 8 to 14 inches (20 to 36 cm) apart, in the garden after developing several leaves. selada spaced further apart receives lebih sunlight, which improves color and nutrient quantities in the leaves. Pale to white lettuce, such as the centers in some iceberg lettuce, contain few nutrients.[17]
A transplanted tempat tidur of selada in a greenhouse
selada grows best in full sun in loose, nitrogen-rich soils with a pH of between 6.0 and 6.8. Heat generally prompts selada to bolt, with most varieties growing poorly above 75 °F (24 °C); cool temperatures prompt better performance, with 60 to 65 °F (16 to 18 °C) being preferred and as low as 45 °F (7 °C) being tolerated.[30] Plants in hot areas that are provided partial shade during the hottest part of the hari will bolt lebih slowly. Temperatures above 80 °F (27 °C) will generally result in poor atau non-existent germination of selada seeds.[30] After harvest, selada lasts the longest when kept at 32 °F (0 °C) and 96 percent humidity. selada quickly degrades when stored with buah-buahan such as apples, pears and bananas that release the ripening agent ethylene gas. The high water content of selada (94.9 percent) creates problems when attempting to preserve the plant – it cannot be successfully frozen, canned atau dried and must be eaten fresh.[31]
selada varieties will menyeberang, salib with each other, making spacing of 5 to 20 feet (1.5 to 6.1 m) between varieties necessary to prevent contamination when saving seeds. selada will also menyeberang, salib with Lactuca serriola (wild lettuce), with the resulting seeds often producing a plant with tough, pahit leaves. Celtuce, a selada variety grown primarily in Asia for its stems, crosses easily with lettuces grown for their leaves.[17] This propensity for crossing, however, has led to breeding programs using closely related species in Lactuca, such as L. serriola, L. saligna, and L. virosa, to broaden the available gene pool. Starting in the 1990s, such programs began to include lebih distantly related species such as L. tatarica.[32] Seeds keep best when stored in cool conditions, and, unless stored cryogenically, remain viable the longest when stored at −4 °F (−20 °C); they are relatively short lived in storage.[1] At room temperature, selada seeds remain viable for only a few months. However, when newly harvested selada se
|
|
