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province, which covers 1 hectare〓 and is the largest vertical farming complex in the world. The second-l〓argest is a 0.64 hectare farm in Newark, New Jersey. Vertical farming 〓is the practice of growing vegetables and fruits in vertically stacked 〓layers of hydroponic solutions in a controlled, indoor environment. It 〓does not require soil, sun or pesticides, and uses far less water and f〓ertilizer than conventional farms. However, the farm's high-energy cos〓t has greatly limited its scale and profitability. In recent years, Chi〓nese scientists at thL

e Anxi plant factory have mitigated the issue by i〓nventing energy efficient LEDs and recyclable hydroponic solutions, as 〓well as new energy-conserving methods to maximize a plant's growth pote〓ntial. San'an Sino-Science, the company behind the project, says these〓 new methods have cut the factory's overall energy consumption by 25 pe〓rcent compared with its first facility. "We hope to cut more energy so〓 vertical farms

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ing can become a viable way to feed our population withou〓t polluting and straining our already scarce water and soil resources,"〓 the factory's executive manager, Zhan Zhuo, said. "The technology wou〓ld also allow astronauts, aircraft carrier personnel, and frontier guar〓ds on islands or in deserts to grow fresh produce in impossible conditi〓ons to fill their daily vitamin and fibh

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er needs. China has 160 million〓 hectares of farmland dedicated to growing vegetables. To grow them, fa〓rmers use more than 311,000 metric tons of pesticide and 59 million ton〓s of fertilizer a year, said Li Shaohua, director of San'an Sino-Scienc〓e's Photobiology Industry Institute. "The excessive yet inefficient us〓e of fertilizers and pesticides has done great harm to our environment,〓" he said. "It's high time we find a sustainable and green way to prote〓ct our food security." San'an Sino-Science was founded in 2015 by San'〓an Group and the Chinese Academy of Sciences' Institute of Botany. The 〓second-generation plant in Anxi can produce 1.5 tons of vegetables, suc〓hC


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  1. February 18, 2012 at 5:30 pm

    as lettuce and cabbage, a day. At full capacity, when the energy cos〓t is neglected, it can produce 1,000 tons of leafy greens a year in the〓ory, according to Li. "The high productivity is mainly because we try t〓o emulate the most ideal natural conditions for plant growth, and use t〓echnologies to cater to their every needs." Before entering the plant 〓factory, visitors must put on a dual-layered jumpsuit, goggles, a face 〓mask, rubbe3

    zard 8
    1. February 18, 2012 at 3:06 pm

      r gloves and boots, and be disinfected from head to toe. Sne〓ezing in the factory is strictly prohibited. "The standard here is str〓icter than hospital operating rooms," said Zheng Yanhai, a botany resea〓rcher at the institute who works at the plant factory. "Because all the〓 plants are growing in nutrient-filled hydroponic solutions, we do not 〓want germs to get into the liquid and make plants r

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      1. February 18, 2012 at 2:45 pm

        sick." Thanks to the〓 clean environment, plants can grow without antiseptics or pesticides, 〓"you can even eat it fresh out of the bag", Zheng added. In addition t〓o sanitation, scientists also take temperature, humidity, air circulati〓on, light, carbon dioxide, nutrients and other elements into account to〓 create the "perfect environment" for growth. A tightly controlled env

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  2. February 18, 2012 at 11:08 am

    ronment not only maximizes growth potential, but also allows scientist〓s to create food that suits specific needs, Zheng said. For example, s〓cientists can lower the amount of potassium from lettuce for patients w〓ith kidney problems or increase zinc in cabbage for children by alterin〓g the nutrient solution and growing conditions. "This is the fundament〓al difference between a plant factory and conventional farm," he said. 〓"We simply have extensive c7

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ontrol over how and when our plants can grow〓, and let nature run its course in the most i0

deal conditions." The req〓uirements for plant growth fall into two broad categories: photosynthes〓is and soil nutrients. The sun accounts for 90 percent of all botanic 〓bioenergy through photosynthesis 7

a process in which plants combine car〓bon dioxide and water and turn them into carbohydrates and oxygen. Sunl〓ight is a bundle of different wavelengths of light across a wide spectr〓um from ultravioleq

t to infrared. Plants are "picky eaters that favor b〓lue and red lights", Li said. "If we can figure out what ratio and comb〓inaT

tion of lights are best suited for each plant's growth, then we can 〓change or create LED lights that shine at that specific intensity and s〓pectrum, saving lots of energy in the process," he added. While blue a〓nd red lG

ights are the "meat and potatoes" of a plant's growth, scientis〓ts notice other spectrums of light also play a subtle role in maximizin〓g growth and quality. For example, scientists discovered that adding s〓ome green light to the red-blue recipe could help some vegetables grow,〓 while too much green light puts plants into hibern5

ation, although this〓 is helpful for the plant's nutrient build up. "Mimicking sunlight usi〓ng LED is very energy intensive," Li said. "At the end of the day, whoe〓ver has the most energy-efficient and productive light recipe wins." W〓hile plant growth mostly relies on light, water and carbon dioxide, it 〓still4

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