Pollution-free vegetables how fertilization?

The company is located in:Pollution-free vegetable production requirements of vegetable nitrate content does not exceed the standard. At present, the nitrate content of vegetables is too high, the main reason is the high nitrogen fertilizer, organic fertilizer less than normal, phosphorus, potassium with unreasonable caused. Therefore, the nitrate content of commercial vegetables must be reduced to the allowable standard through reasonable fertilization techniques. That pollution-free vegetables how to fertilize it? Here to tell you about pollution-free vegetables fertilization technology.

Pollution-free vegetables how to fertilize

1, emphasis on the application of organic fertilizer. Nitrogen concentration in soil and the type of nitrogen applied directly affect crop disease resistance, commerciality and nitrate content. Therefore, to keep the soil loose and fertile, it is the key technology to reduce crop diseases and pests and obtain high quality and high yield. With the long-term use of inorganic fertilizers in the vegetable fields, the soil is seriously deficient in organic phosphorus and potassium, and soil nutrients are out of balance. Large amounts of acidic substances remain in the soil, causing soil compaction and acidification, reducing crop stress resistance, deteriorating pests and diseases and deteriorating quality. , We must attach importance to the use of organic fertilizer.

Pollution-free vegetables allowed to use the types of fertilizer are: (1) peasant fertilizer. Refers to a large number of biological materials, animal and plant residues, excrement and bio-waste and other substances in the fertilizer. There are mainly composting, fertilizer, manure, biogas fertilizer, green manure, crop straw and cake fertilizer. (2) commodity fertilizer. Commodity organic fertilizer, humic acid fertilizer, microbial fertilizer, organic compound fertilizer, inorganic (mineral) fertilizer and foliar fertilizer. (3) Inorganic fertilizer must be combined with organic fertilizer. (4) Urban rubbish needs to be innocuously treated, and the quality can reach the national standard before being limited.

Pollution-free vegetables fertilization technology

2, scientific application of fertilizer. In the production of pollution-free vegetables, in addition to vigorously promote the addition of organic fertilizer, we must scientific application of chemical fertilizers, according to the amount of fertilizer needed, the implementation of nitrogen, phosphorus and potassium formula fertilization.

3, the use of advanced fertilization methods. Fertilizer deep facilities, can reduce the fertilizer and air contact, to prevent the volatilization of nitrogen, but also reduce the ammonia ion is oxidized to nitrate ions, reduce the pollution of vegetables. Root vegetables shallow and non-volatile fertilizer should be appropriate shallow facilities; root deep and volatile fertilizer should be properly applied.

4, master the appropriate fertilizer time (period). Before harvest in the food market, you can not use a variety of fertilizers. In particular, the direct consumption of leafy vegetables, but also to prevent the pollution of fertilizers and microorganisms. The last dressing must be done 30 days before the harvest.

The above is the introduction of pollution-free vegetables fertilization technology, farmers friends can refer to the above method, combined with the actual planting situation, reasonable fertilization.