By Han
Lewu
Posted:May 27,2011 Views:7
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Do not use a lot of external resources for its success in
maintaining soil fertility and health. This is a hundred years ago,
China's agriculture in Western agronomists found the most amazing place. But today,
China's agriculture is on the road to industrialization by the
large chemical fertilizer large pesticides, herbicides, additives, plastic sheeting and
other running all the way coerced.
Now we are bogged down in the food security dilemma can not
extricate themselves. Experts have warned that, should reflect our
current agricultural production?
'White terror'
The 'white pollution', people tend to more concerned about the
disposable plastic lunch boxes and the city shopping bags used. But
the reporter was informed that currently there are about 500,000 tons of plastic sheeting
year remains in the soil, plastic film rate of 40%. Agriculture
film production in the agricultural use does not take into account a large number of
the degradation problems, the ecological environment of China paid
a heavy price, to accelerate the land of 'death(http://www.f-paper.com/).'
'I have a few field trips in ten countries, had never seen a
country like ours, in a big way to promote the application of
plastic sheeting, the country with mountains and rivers of a 'white'.'
Jiang Gaoming researcher at the Institute of Botany
says.
Long-term commitment of degraded ecosystems and rehabilitation of
degraded farmland Jiang GM, told reporters a few days ago I start
to see him in some rural areas was almost clear of a white plastic film covered
farmland, hillside scene, the use of 'white terror' to
describe.
According to Jiang Gaoming introduced a large number of residues in
the soil in the plastic sheeting, 15-20 cm soil layer in the
formation of hard permeable, breathable layer of hard farming. Some of his life and
concluded: probably seven generations, 140 years is also
degradation can not afford.
In Jiang Gaoming view, plastic sheeting is the most rubbish
inventions of modern agriculture(News News http://www.f-paper.com/). People use it to be part of the increase resulting from dependence.
Hoeing in the departure from the traditional approach, without
organic manure, straw and other support, the covering
layer of plastic sheeting to
achieve the insulation, water, weeding, pesticides and other
purposes, appear to be no better thing, but actually paid a
heavy price, is
accelerating land 'death.' tantamount to 'get its
eggs.'
'Red lines' and endangered
Reporters were told that since the last century since the late 70s,
just a few decades, China's cultivated land there is a clear
decline in fertility, the national average of less than 1% of soil organic matter. And at
the same time, China's chemical fertilizer and the growth rate is
surprised.
According to Jiang Gaoming, the international recognized safety
limits application of chemical fertilizer is 225 kg / ha, but the
average per unit area of application of chemical fertilizers reached 434.3 kg / ha, 1.93
times the safe limit.
Provided from the average application rate of fertilizer chart
shows changes in the last century, the age of 50 hectares (15
acres) of land more than 8 kg of chemical fertilizer is now 868 pounds.
To a hundred times the speed increase.
'But these fertilizer utilization rate is only around 40%. Did not
run out, have become contaminated.' Jiang Gaoming
said.
Jiang Gaoming that
maintaining the current food production, to pesticides and
fertilizers, the application rate by half is
sufficient.
There are a number for Jiang Gaoming to
heart: China's factory farm animals produce 2.7
billion tons of animal waste every year, about 3.5 times the
industrial solid
waste. But separation of breeding and cultivation and other
reasons, they could have become very good fertilizers, animal
wastes should not use the place. results 'on the one hand agricultural non-point source
pollution, on the one hand mass production of fertilizers. Both are
due benefits or reduce. Victims are cultivated with consumers.' Jiang Gaoming
said.
In fact, even without a direct result of chemical fertilizer and
pesticide pollution, irrigation and other industrial and mining
waste water sewage pollution on the land have made it an indirect overwhelmed.
According to the survey, the country's arable land contaminated
about 1.5 million mu, accounting for almost the total area of cultivated land in
China one-tenth. this insight calls, hold 18 million mu of arable
land 'red line' not just hold their number, but also
keep their health,
cleanliness of the 'red line.'
Where are we going?
In Jiang Gaoming view, Investment in agriculture rely on a large
number of chemical substances called the salient features of the
so-called modern agriculture, harm many, unsustainable. It is not only a large
number of mining exploration, oil, etc., so that increased
pollution and greenhouse gas emissions, a large number of chemicals into arable land,
causing land pollution, 'but the damage must not stop there, land
pollution is also a serious threat to food, food security.'
Jiang Gaoming said, 'around a circle, the ultimate land of toxic
substances in the body to return to camp.' Recent reports 'cadmium
rice' is an example.
When the 'hoe Wo day when afternoon' type replaced the traditional
farming methods, pesticides, chemical fertilizers, herbicides,
additives, plastic sheeting and other modern agricultural 'conventional weapons', the
Jiang Gaoming that 'industrialization of agriculture has been
greatly shaken our The agriculture. '
When the cause of watermelon 'explosion' is the leavening agent
known to the public, people puzzled 'why use it' because it is
clear that this is contrary to the laws of plant growth.
However, contrary to the laws of nature similar phenomenon in
agricultural production everywhere, just as Jiang Gaoming cited:
in-season fruit and vegetable production, exacerbated by drug residues in agricultural
products, animals, 'crash course' to chickens, ducks, geese and
other poultry class life cycle shortened to 28-45 days, the pigs reduced to 2.5-4 months.
'These serious breaches of the law of planting and breeding biology
model inundation, so that a variety of pesticides, hormones and food additives, filled
with urban and rural areas.'
People are confused: the source of our food - the primary
agricultural products, have been subjected to such a chemical
production, industrialization of the 'baptism', dare again in food
processing, transport or preservation without restraint or even
added a variety of chemical agents non-toxic and hazardous
substances consumed? we
really want to go?
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