hydroponics


hydroponics
hydroponic, adj.hydroponically, adv.hydroponist /huy drop"euh nist/, hydroponicist, n.
/huy'dreuh pon"iks/, n. (used with a sing. v.)
the cultivation of plants by placing the roots in liquid nutrient solutions rather than in soil; soilless growth of plants. Cf. aeroculture, geoponics (def. 2).
[1935-40; HYDRO-1 + (GEO)PONICS]

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Cultivation of plants in nutrient-enriched water, with or without the mechanical support of an inert medium such as sand or gravel.

Fertilizer solution is pumped through the system periodically. As the plants grow, concentration of the solution and frequency of pumping are increased. A wide variety of vegetables and florist crops can be grown satisfactorily in gravel. Automatic watering and fertilizing saves on labor, but installation costs are high and fertilizer solution must be tested frequently. Yields are about the same as for soil-grown crops.

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also called  Aquaculture, Nutriculture, Soilless Culture, or Tank Farming,  

      the cultivation of plants in nutrient-enriched water, with or without the mechanical support of an inert medium such as sand or gravel.

      Plants have long been grown with their roots immersed in solutions of water and fertilizer for scientific studies of their nutrition. Early commercial hydroponics (from Greek hydro, “water,” and ponos, “labour”) adopted this method of culture. Because of the difficulties in supporting the plants in a normal upright growing position and aerating the solution, however, this method was supplanted by gravel culture, in which gravel supports the plants in a watertight bed or bench. Various kinds of gravel and other materials have been used successfully, including fused shale and clay and granite chips. Fertilizer solution is pumped through periodically, the frequency and concentration depending on the plant and on ambient conditions such as light and temperature. The solution drains into a tank, and pumping is usually automatic.

      The solution is composed of different fertilizer-grade chemical compounds containing varying amounts of nitrogen, phosphorus, and potassium—the major elements necessary for plant growth—and various trace, or minor, elements such as sulfur, magnesium, and calcium. The solution can be used indefinitely; periodic tests indicate the need for additional chemicals or water. The chemical ingredients usually may be mixed dry and stored. As the plants grow, concentration of the solution and frequency of pumping are increased.

      A wide variety of vegetables and florist crops can be grown satisfactorily in gravel. The principal advantage is the saving of labour by automatic watering and fertilizing. The disadvantages are high installation costs and the need to test the solution frequently. Yields are about the same as for soil-grown crops.

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Universalium. 2010.

Look at other dictionaries:

  • Hydroponics — (from the Greek words hydro (water) and ponos (labour) is a method of growing plants using mineral nutrient solutions, without soil. Terrestrial plants may be grown with their roots in the mineral nutrient solution only or in an inert medium,… …   Wikipedia

  • hydroponics — 1937, formed in English from HYDRO (Cf. hydro ) + ponics, from Gk. ponein to labor, toil, from ponos labor (see SPAN (Cf. span) (v.)). Related: Hydroponic (adj.) …   Etymology dictionary

  • hydroponics — ► PLURAL NOUN (treated as sing. ) ▪ the growing of plants in sand, gravel, or liquid, with added nutrients but without soil. DERIVATIVES hydroponic adjective hydroponically adverb. ORIGIN from Greek hud r water + ponos labour …   English terms dictionary

  • hydroponics — ☆ hydroponics [hī΄drə pän′iks ] n. [ HYDRO + (GEO)PON(IC) + ICS] the science of growing or the production of plants in nutrient rich solutions or moist inert material, instead of in soil hydroponic adj. hydroponically adv. hydroponicist [hī΄drə… …   English World dictionary

  • hydroponics — hidroponika statusas T sritis ekologija ir aplinkotyra apibrėžtis Augalų auginimas maistinguose tirpaluose be dirvožemio. atitikmenys: angl. hydroponics vok. Hydroponik, f rus. водная культура, f; гидропоника, f …   Ekologijos terminų aiškinamasis žodynas

  • hydroponics — hidroponika statusas T sritis augalininkystė apibrėžtis Augalų auginimas maitinamuosiuose tirpaluose be dirvožemio. atitikmenys: angl. hydroponics rus. гидропоника …   Žemės ūkio augalų selekcijos ir sėklininkystės terminų žodynas

  • hydroponics — noun plural but singular in construction Etymology: hydr + ponics (as in geoponics agriculture) Date: 1937 the growing of plants in nutrient solutions with or without an inert medium (as soil) to provide mechanical support • hydroponic adjective… …   New Collegiate Dictionary

  • hydroponics — noun the cultivation of plants in a nutrient solution rather than in the soil …   Wiktionary

  • hydroponics — Synonyms and related words: agrarianism, agricultural geology, agriculture, agrology, agronomics, agronomy, algology, aquiculture, botany, bryology, contour farming, cultivation, culture, dendrology, dirt farming, dry farming, dryland farming,… …   Moby Thesaurus

  • hydroponics — hy|dro|pon|ics [ ,haıdrə panıks ] noun uncount a method of growing plants in water that has special food in it but no soil …   Usage of the words and phrases in modern English


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