Chemical Business – The Backbone of Agricultural Development
公開日:2022/05/19 / 最終更新日:2022/05/19
Over very long time, human meals and clothing depended mainly on agriculture. While ever for the reason that historical time, agriculture had always relied on numerous human labor, which was topic to varied kinds of natural conditions. So the development of agriculture was very slow. Through the nineteenth century, the usage of agricultural machinery gradually improved the working conditions. However, in agricultural production, it was the application of chemical fertilizers and pesticides that really elevated the agricultural output in per unit area.
Follow shows that, among all of the measures to extend the agricultural production, the position performed by chemical fertilizers is forty% to 65%. On the premise of the booming within the petrochemical business, synthetic ammonia and urea have realized giant-scale production, which makes the output of chemical fertilizer occupy a large proportion in the chemical products. In 1985, the total output of chemical fertilizer on the earth amounted to approximately a hundred and forty million ton, which made it turn into one of the bulk chemical products. In recent times, the development of nitrogen, phosphorus and potassium compound fertilizer and trace components fertilizer has additional meet the calls for of various soil buildings and completely different crops.
Within the early interval, individuals used natural animals, plants and minerals to prevent and treat crop pests and diseases. Till the late 19th century, after the formation of contemporary chemical trade, individuals began to use arsenic preparation to kill beetles on potato, and use Bordeaux mixture to stop and treat downy mildew on grapes, in order that agriculture started a new period of chemical prevention and treatment. In the course of the Nineteen Forties, loads of pesticides and herbicides, reminiscent of organic chlorine, organic phosphorus, had been produced and widely utilized in agriculture, forestry, animal husbandry and public health. Nevertheless, a few of the pesticides during this period have been rich in residues or poison, which caused ecological pollution, so that they had been banned by many countries.
In recent years, a number of efficient, low-residue, low-poisonousity pesticides have been developed, together with pyrethroid, which is a bionic pesticide and will not pollute the environment. It has been put into industrial production. As a result, bio-pesticides have develop into essentially the most active areas in pesticide research currently.
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