Nutrient liquid capable of improving resistance of cucumbers as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of plant nutrient liquid and particularly discloses nutrient liquid capable of improving resistance of cucumbers as well as a preparation method and application thereof. The nutrient liquid comprises gamma-aminobutyric acid, potassium nitrate, calcium nitrate tetrahydrate, monopotassium phosphate, magnesium sulfate heptahydrate, trace elements and the like, and comprises macroelements such as N, P, K, Ca, Mg and S. When the nutrient liquid is applied to the fruiting period of the cucumbers, the picking period of the cucumbers can be significantly prolonged, the malformation rate can be reduced, the fruit yield of single plant of cucumber can be increased, and the content of vitamin C, soluble protein and free amino acid of the cucumbers can be significantly increased; in addition, when the nutrient liquid is applied to the fruiting period of the cucumbers, the nitrate content of the cucumbers can be reduced, the net photosynthetic rate of the cucumbers is increased, intercellular carbon dioxide concentration and the stomatal conductance are increased, element deficiency symptoms in the middle and later fruiting period of the cucumbers are avoided, and the high-temperature resistance and the extreme environment resistance of the cucumbers are significantly enhanced.

Description

technical field [0001] The invention belongs to the technical field of plant nutrient solution, and in particular relates to a nutrient solution capable of improving cucumber resistance, a preparation method and application thereof. Background technique [0002] Cucumber belongs to the Cucurbitaceae Cucumber genus plant, monoecious and parthenocarpic, oblong fruit, yellow-green when ripe, rough surface, rich in protein, vitamin C, sugar, carotene and other nutrients, with beauty and skin care , lowering blood pressure and many other health effects. Cucumber is one of the main vegetable crops in protected cultivation in my country. [0003] Soilless cultivation is a new technology of crop cultivation developed in recent decades. Crops are not cultivated in soil, but are planted in an aqueous solution (nutrient solution) containing dissolved minerals; or in some kind of cultivation medium, crops are cultivated with nutrient solution. As long as there are certain cultivation...

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Problems solved by technology

[0004] Nutrient solution is the key factor for the success of soilless cultivation. At present, international nutrient solution formulas such as Hoagland, Yuanshi, and Yamazaki developed decades ago are still widely used in my country. However, in actual production, cucumbers often encounter various biological and abiotic stress. Abiotic stress mainly includes salt stress, temperature stress, drought stress and heavy metal stress, which seriously restrict its normal growth and development and affect its yield and quality.

At present, these commonly used nutrient solutions cannot fully meet the needs of the existing soilless cultivation production. Therefore, on the basis of the improvement of varieties, technologies, and models, it is particularly important to improve the stress resistance of cucumbers by supplementing functional nutrient solutions for substrate cultivation. , at the same time has great significance in cucumber production

[0005] GABA, also known as γ-aminobutyric acid, is a non-protein amino acid naturally occurring in organisms and an important intracellular signaling molecule. Studies have shown that under normal circumstances, the GABA content in plant tissues is low, about 0.03-2.00μmol / g FW, under a series of environmental stresses, GABA in plants can rapidly accumulate in response to the inhibition and damage of stress on plant growth and development, including low oxygen, high temperature, drought and salt stress, etc., but in Under adversity, the synthesis of GABA will be inhibited, its accumulation is limited, and it will slowly meet the growth needs of plants

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