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Chemical Business - The Backbone of Agricultural Development

 

Over very long time, human meals and clothing depended primarily on agriculture. While ever because the ancient time, agriculture had always relied on lots of human labor, which was subject to numerous kinds of natural conditions. So the development of agriculture was very slow. During the 19th century, the use of agricultural machinery gradually improved the working conditions. Nevertheless, in agricultural production, it was the application of chemical fertilizers and pesticides that really elevated the agricultural output in per unit area.

 

 

Practice shows that, among all the measures to increase the agricultural production, the role played by chemical fertilizers is forty% to 65%. On the basis of the booming within the petrochemical business, artificial ammonia and urea have realized giant-scale production, which makes the output of chemical fertilizer occupy a large proportion within the chemical products. In 1985, the total output of chemical fertilizer on the planet amounted to approximately 140 million ton, which made it turn out to be one of many bulk chemical products. Lately, the development of nitrogen, phosphorus and potassium compound fertilizer and hint elements fertilizer has further meet the calls for of various soil buildings and different crops.

 

 

Within the early interval, folks used natural animals, plants and minerals to forestall and deal with crop pests and diseases. Till the late nineteenth century, after the formation of modern chemical trade, individuals started to make use of arsenic preparation to kill beetles on potato, and use Bordeaux mixture to prevent and deal with downy mildew on grapes, so that agriculture began a new period of chemical prevention and treatment. Throughout the Nineteen Forties, plenty of pesticides and herbicides, similar to natural chlorine, organic phosphorus, have been produced and widely used in agriculture, forestry, animal husbandry and public health. However, among the pesticides during this interval were rich in residues or poison, which caused ecological pollution, in order that they had been banned by many countries.

 

 

In recent years, a number of efficient, low-residue, low-toxicity 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. Consequently, bio-pesticides have develop into the most active areas in pesticide research currently.

 

 

What's more, plastic film (comparable to high pressure polyethylene, linear low density polyethylene, etc.) has been applied in trendy agriculture, which is used for mulching film or greenhouse seedlings. It may well significantly enhance the output of the crops, so it is now being popularized on a big area.

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