A kind of protected cultivation potato antifreeze method and its application

Abstract

The invention discloses an antifreeze method for potatoes (vegetables) cultivated by the aid of facilities and application of the antifreeze method. The antifreeze method includes steps of 1, blending tissue water, to be more specific, gradually controlling soil and plant water in 10-15 days before frequent occurrence of freezing damage or late spring coldness, particularly, controlling the water, and exhausting moisture so that the relative water contents of substrates / soil are 30-40% under the control when freezing weather comes; 2, deploying tissue freezing points, to be more specific, spraying regulating antifreeze agents A with 0.1-0.6% of Sucrose, 0.2% of CaCl2 and 0.1% of KH2PO4 once every three days in 7-8 days before the freezing weather comes so as to improve the concentration of cell permeation regulation substances in a programmed manner, and reducing the tissue freezing points of crops; 3, activating cold-resistant signals of cells, to be more specific, applying inducible antifreeze agents B with 1-5 mmol / L H2O2 in 1-2 days before the freezing weather comes, initiating cascade reaction of cold-resistant correlated signal pathways in the cells and mobilizing cold-resistant emergency reaction of the crops. The antifreeze method and the application have the advantages of simplicity in operation, good antifreeze effect and low cost.

Description

technical field [0001] The invention belongs to the technical field of antifreeze for crop cultivation, and relates to a method for step-by-step adjusting the moisture status and osmotic environment of plant tissues, starting cell emergency response in advance, and improving the freeze-resistant ability of vegetables, especially potatoes. Background technique [0002] There are more than 300 million mu of winter fallow fields in southern my country's rice production areas, and planting potatoes in winter fallow fields is a new and effective measure to improve my country's food security. In recent years, the planting area of ​​winter crop potatoes in my country has reached more than 30 million mu. However, potatoes like temperature and are afraid of cold, and the growth period of winter potato seedlings is mostly in low temperature and rainy weather, and frost occurs frequently. Affected by freezing often leads to delayed growth period and unstable yield of winter cropped po...

AI Technical Summary

Problems solved by technology

Although the physical method of multi-layer covering in protected cultivation production is effective, on the one hand, it is labor-intensive and time-consuming because of the high cost, and on the other hand, the frequent removal of the covering (film) due to light and temperature adjustment.

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