Control technique for reducing nitrates accumulation in Chinese chive

Abstract

A regulation and control technology used for lowering the accumulation of leek azotate aims at the accumulation problem of leek azotate caused by excessively applying nitrogen fertilizer for pursuing high output and the negative solution problem for lowering fertilizer of simply and blindly limiting the application rates of nitrogen fertilizer. The new technology takes the promotion of the reduction and the assimilation of azotate as well the conversion and synthesis into amino acid and protein as an entry point, first creates the positive measures for lowering the accumulation of leek azotate and adopts salicylic acid ( novel metabolism regulation and control hormone) for leaf surface spraying and obtaining the obvious effect of lowering the accumulation of leek azotate, the salicylic acid can obviously lower the accumulation of leek azotate in the face of high nitrogen level, meanwhile, the effects of increasing output and improving the quality can be obtained and the efficiency and the utilization rate of the nitrogen fertilizer can be improved. The appropriate concentration of the leaf surface spraying salicylic acid is 3mmol.L<-1> and the appropriate period for leaf surface spraying is 6 to 9 days before harvesting leek.

Description

technical field [0001] The invention relates to a control technology for reducing the accumulation of nitrate in leek Background technique [0002] There are two main problems existing in the production of leek (Allium tuberosum R.) at present: one is to prevent and treat serious drug residues and poisoning problems caused by leek maggots. The second is the accumulation of nitrate in leeks caused by excessive application of nitrogen fertilizer in pursuit of high yield. Due to the occurrence of leek poisoning incidents from time to time, the control of leek drug residues has attracted much attention from all walks of life. In contrast, leeks, which are leafy vegetables, have the characteristics of high accumulation of nitrates, which cannot be ignored. [0003] Leek likes nitrate nitrogen, and it is easy to enrich nitrate. In order to limit the absorption of nitrate nitrogen, some researches and productions at home and abroad generally adopt the control of nitrogen applica...

AI Technical Summary

Problems solved by technology

[0002] At present, there are two main problems in the production of leek (Allium tuberosum R.): one is to prevent serious drug residue and poisoning caused by leek maggots

The second is the accumulation of nitrate in leeks caused by excessive application of nitrogen fertilizers in pursuit of high yield

Taking measures to control the amount of nitrogen application can significantly control the accumulation of nitrate, but at the same time it will lead to different degrees of yield reduction and is not acceptable to farmers

Especially the negative weight loss measures through excessively reducing the amount of nitrogen fertilizer, often cause the elongation and division of cells to be inhibited and the synthesis of protein to be hindered due to the lack of nitrogen, resulting in slow growth of vegetables, short plants, reduced plant robustness, and resistance to disease. Decreased ability of diseases and insect pests, product yield, appearance quality and nutritional quality will affect the economic income of vegetable farmers, thus affecting the development of pollution-free vegetable production

Obviously, due to the irreplaceable role of nitrogen in the formation of plant growth and yield and quality, this kind of blind restriction of nitrogen fertilizer application can significantly reduce the accumulation of nitrate, but it is a negative measure

[0004] So far, there is no report that a technology can effectively reduce leek nitrate both at home and abroad