Chemical Industry – The Backbone of Agricultural Development

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

Follow shows that, among all of the measures to increase the agricultural production, the position played by chemical fertilizers is 40% to 65%. On the basis of the booming in the petrochemical trade, artificial ammonia and urea have realized massive-scale production, which makes the output of chemical fertilizer occupy a big proportion within the chemical products. In 1985, the total output of chemical fertilizer in the world amounted to approximately 140 million ton, which made it turn into one of the bulk chemical products. In recent years, the development of nitrogen, phosphorus and potassium compound fertilizer and trace parts fertilizer has additional meet the demands of different soil structures and totally different crops.

In the early period, people used natural animals, plants and minerals to prevent and deal with crop pests and diseases. Until the late 19th century, after the formation of modern chemical trade, folks started to make use of arsenic preparation to ksick beetles on potato, and use Bordeaux mixture to forestall and deal with downy mildew on grapes, so that agriculture began a new period of chemical prevention and treatment. During the Forties, a whole lot of pesticides and herbicides, resembling organic chlorine, organic phosphorus, had been produced and widely utilized in agriculture, forestry, animal husbandry and public health. Nevertheless, among the pesticides throughout this interval have been rich in residues or poison, which caused ecological air pollution, so that they had been banned by many countries.

Lately, 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 turn into essentially the most active areas in pesticide research currently.

What’s more, plastic film (resembling high pressure polyethylene, linear low density polyethylene, etc.) has been applied in trendy agriculture, which is used for mulching film or greenhouse seedlings. It could actually significantly improve the output of the crops, so it is now being popularized on a large area.

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