| 单词 | sand culture |
| 释义 | > as lemmassand culture sand culture n. Botany a hydroponic method of plant cultivation in which the plants are rooted in beds of purified sand supplied with nutrient solutions, used esp. to determine their mineral requirements; a culture of this kind; usually attributive. ΘΚΠ the world > food and drink > farming > gardening > [noun] > hydroponics aquaculture1887 sand culture1916 drip culture1923 aquaponics1937 hydroponics1937 gravel culture1940 ring culture1953 1916 Soil Sci. II. 208 The sand culture solutions giving low yields of tops are characterized by a wide range in the Mg/Ca ratio. 1936 Phytopathology 26 279 Soil cultures were similarly prepared and kept with the sand cultures under the same conditions. 1940 A. Laurie Soilless Culture Simplified viii. 136 The advantage often claimed for sand or gravel culture—that of increased production—can easily be overstressed. 1978 Fluoride XI. 76 In Helianthus annus seedlings grown in sand culture for five weeks the concentration of fluoride in the root and shoot was generally proportional to the concentration in the substrate. < as lemmas |
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