A method of drip irrigation and fertilization under plastic film for tobacco

Abstract

The invention discloses a fertilizing method for tobacco in a manner of drip irrigation under a plastic film. A drip irrigation system is used for sending a water fertilizer mixed solution required by each stage of the tobacco growth to a tobacco root zone soil; the water fertilizer mixed solution is one or more of compound fertilizer aqueous solution special for tobacco, phosphate fertilizer aqueous solution, potassium nitrate aqueous solution and potassium sulfate aqueous solution; and the compound fertilizer special for tobacco and the phosphate fertilizer are applied as base fertilizers in a transplanting process, the dosage of the compound fertilizer special for tobacco is reduced and the application time of the potassium sulfate is delayed in stages. The invention positively responds to the double reduction plan established by the Ministry of Agriculture, the dosage of nitrogen and phosphor is greatly reduced and the agricultural non-point source pollution is reduced. Compared with the conventional fertilizing, the invention has the advantages that the drip irrigation under the plastic film is adopted for fertilizing, the dosage of the potash fertilizer is not changed, the total dosage of the nitrogen and phosphor fertilizer is respectively reduced by 15kg / hm<2> and 18kg / hm<2>, and meanwhile, the obvious output reduction is not caused and the output value is basically not changed. Various chemical components in the tobacco leaves are close to harmonious and balanced state and are approximate to the suitable content scope of high-quality tobacco leaves.

Description

technical field [0001] The invention belongs to the field of crop cultivation, and relates to a fertilization method, in particular to a drip irrigation and fertilization method for tobacco. Background technique [0002] Tobacco is an economic crop that requires a lot of water, and the water requirements are different in different growth stages. The annual distribution of precipitation in some tobacco areas is very uneven, which seriously affects the normal growth of flue-cured tobacco. Therefore, strengthening the research on water-saving irrigation technology, optimizing water management, and saving water are important conditions for improving the yield and quality of tobacco leaves. [0003] Under-mulch drip irrigation is a new type of water-saving irrigation technology. The capillary is buried under the touch, and the water or the mixture of water and fertilizer is sent to the soil in the root zone of the crop through the water outlet at a fixed time, quantity and ratio...

AI Technical Summary

Problems solved by technology

[0006] In view of this, the first technical problem to be solved by the present invention is the problem of long-term non-point source pollution in the tobacco cultivation process

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