The amount of application of chemical fertilizer is increased hundredfoldly in 60 in China Threaten the security of food

The amount of application of chemical fertilizer is increased hundredfoldly in 60 in China Threaten the security of food
The official side admits too the land, especially cultivated land of our country is very serious in pollution at present. According to the investigation, the cultivated land polluted in the whole country is nearly 10 million hectares, nearly accounts for 1/10 of China's total cultivated area.
The average consumption of chemical fertilizer of our country is that the chemical fertilizer of developed country uses 2 times of upper limit safely
About 500,000 tons of agricultural membrane remain and is pointed our country in the soil every year " The White terror "
Per mu of farmland in our country needs to use nearly 1 kilograms of pesticide and 60%- 70% remain it in the soil
" know plant growth regulator scientifically " , " the norm uses harmless health " , " include in pesticide and supervise strictly "
It is explained that no matter how the melon expert is and pacify, recently " to split " The incident was hit " Expand pharmaceutical " Three words, have already let many consumers eat water-melons and " hope to be great to grow and fear " this summer . But the uneasy one is far more than a piece of anything again " Pharmaceutical " ?
"No matter hurt, why use it? " This quite representative doubt, is actually pointing to the question of a fundamental, agricultural mode of production.
The reporter learns recently, the average amount of application of the chemical fertilizer of our country is that the chemical fertilizer of developed country uses 2 times of upper limit safely at present, but utilization ratios are only about 40% on average;
About 1,700,000 tons of annual output of pesticide of our country, each mu for 120 million hectares of farmland needs nearly 1 kilogram on average;
Nearly 500,000 tons of agricultural membrane remain in the soil every year in our country, the incomplete membrane rate is up to 40%
The chemistry formates the foundation that the material has not merely polluted agriculture such as cultivated land, water, still threaten the food security seriously.
Do not use a large number of outside resources to keep soil fertility and health successfully. This is Chinese agriculture which the western agronomist found 100 years ago. But even to this day, the agriculture of China is being wrapped up in and bolts holding No. one under the arm by big chemical fertilizer, big pesticide, weed killer, additive, agricultural membrane,etc. on the industrialized road.
We have already got deeply stuck in the food security predicament without freeing oneself nowadays. The expert reminds, should review our present agricultural mode of production?
About 500,000 tons of annual agricultural membrane remain in the soil
To that " white is polluted " The question, people often relatively pay close attention to use and recovery of disposable plastics meal box and shopping bag,etc. in the city. But the reporter learns, nearly 500,000 tons of agricultural membrane remain in the soil every year in our country at present, the incomplete membrane rate is up to 40%. Using but not considering its degrading the question in a large amount in agricultural production of agricultural membrane, make the ecological environment of our country pay the heavy cost, has accelerated " death " of the cultivated land .
"Dozens of countries of my physical verification, have never seen a country like our country, popularize, employ the agricultural membrane on a grand scale, make the national mountains and rivers one slice is ' white '. " Jiang GaoMing, researcher of Ins of plant,Academia Sinica, says in this way.
Devoted to degradating the ecosystem for a long time Jiang GaoMing that and degradate the farmland repaired, told him to the reporter in the scene of some farmland, hillside nearly covered by a clear a white plastic membrane seen in countryside a few days ago, use " White terror " Come to describe.
According to the introduction of Jiang GaoMing, remain the agricultural membrane in the soil in a large amount, form completely difficult water, ventilative difficult arable layer on soil layer of 15-20 centimetres. The most key one is that it can not degrade. Someone draws the conclusion after studying its life-span: Probably want 7 generations of persons, also degrade in more than 140 years.
The troubling one has, in the course of degrading the agricultural membrane, there will be carcinogen dioxin that will be discharged into the air. For example some hardworking peasants burn in situ after choosing the agricultural membrane out from the field, seem to be clean, it has been entered in peasant's health and atmosphere that in fact burnt virulent dioxin discharged at low temperature, become malignant pollutant different to remove.
Seem while being sophisticated in Jiang, agricultural membrane modern the intersection of agriculture and invention of the rubbish most. People utilize it to rely on after increasing production by a part. Having broken away from the method of hoeing the fields of the tradition, it is unnecessary organic fertilizer, straw,etc. raise the ground, covering a layer of agricultural membrane realizes the purpose of keeping warm, protecting water, weeding, insecticidal etc., it is the best thing that the surface is seen, but paid the heavy cost in fact, accelerating the cultivated land " The death " ,Tantamount to " Sacrifice future gains to satisfy present needs " .

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