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CN-120513823-B - Method for improving salt tolerance of asparagus

CN120513823BCN 120513823 BCN120513823 BCN 120513823BCN-120513823-B

Abstract

The invention belongs to the technical field of crop cultivation, and particularly relates to a method for improving salt tolerance of asparagus seedlings. The growth of asparagus seedlings is obviously inhibited under the stress of salt, and the growth of stems and leaves is retarded, the growth of root systems is blocked and the photosynthetic capacity is reduced. The experiment shows that the fresh weight, dry weight, root length, stem thickness and other growth indexes of the asparagus seedlings and the photosynthetic parameters such as net photosynthetic rate, chlorophyll content and the like can be restored to be close to the normal level by applying the composite nutrient solution rich in the silicon source and the selenium source to the two-leaf one-heart asparagus seedlings exogenously, wherein the dosage of the single application of the composite nutrient solution is 1.1-1.4 square/mu, and the continuous treatment is carried out for 14-20 times after 2-3 days. The method is simple and convenient to operate and low in cost, and provides a feasible nutrition regulation strategy for efficient cultivation of asparagus in salinized soil.

Inventors

  • SONG JINNAN
  • YANG JINGLI
  • ZHAI XIAOSONG
  • ZHANG HAIJUN
  • XU HAICHENG

Assignees

  • 潍坊科技学院

Dates

Publication Date
20260508
Application Date
20250530

Claims (7)

  1. 1. A method for improving salt tolerance of asparagus seedlings is characterized by comprising the steps of selecting two-leaf one-heart asparagus seedlings, applying a compound nutrient solution rich in 12.74 mg/L-14.57 mg/L selenium and 0.02 mg/L-0.06 mg/L silicon to the asparagus seedlings, and applying the compound nutrient solution at a single dose of 1.1-1.4 square/mu, wherein each liter of the compound nutrient solution contains effective components and the content of ：Ca(NO 3 ) 2 ·4H 2 O 660 mg~760 mg、Mg(NO 3 ) 2 ·6H 2 O 120 mg~220 mg、MgSO 4 ·7H 2 O 200 mg~300 mg、KNO 3 460 mg~560 mg、NH 4 H 2 PO 4 180 mg~280 mg、K 2 SiO 3 70 mg~80 mg、H 3 BO 3 1.15 mg~1.35 mg、CuSO 4 ·5H 2 O 0.115 mg~0.135 mg、Fe-EDTA 3.0 mg~5.0 mg、MnSO 4 ·4H 2 O 2.0 mg~2.4 mg、H 2 MoO 4 0.06 mg~0.10 mg、ZnSO 4 ·7H 2 O 1.00 mg~1.30 mg、 pure Se is 0.02-0.06 mg.
  2. 2. The method for improving the salt tolerance of asparagus seedlings according to claim 1, wherein each liter of said compound nutrient solution contains effective components and has a content of ：Ca(NO 3 ) 2 ·4H 2 O 710mg、Mg(NO 3 ) 2 ·6H 2 O 170 mg、MgSO 4 ·7H 2 O 250 mg、KNO 3 510 mg、NH 4 H 2 PO 4 230 mg、K 2 SiO 3 77 mg、H 3 BO 3 1.24 mg、CuSO 4 ·5H 2 O 0.124mg、Fe-EDTA 4.0 mg、MnSO 4 ·4H 2 O 2.2 mg、H 2 MoO 4 0.08 mg、ZnSO 4 ·7H 2 O 1.15 mg、 pure Se 0.04: 0.04 mg.
  3. 3. Method for improving the salt tolerance of young asparagus seedlings according to claim 1, characterised in that the compound nutrient solution is applied by irrigation or spraying.
  4. 4. The method for improving the salt tolerance of asparagus seedlings according to claim 1, wherein said composite nutrient solution is applied to said asparagus seedlings every 2 to 3 days.
  5. 5. The method for improving the salt tolerance of asparagus seedlings according to claim 1, wherein the compound nutrient solution is applied for 14-20 times continuously.
  6. 6. The method for improving the salt tolerance of asparagus seedlings according to claim 1, wherein the temperature of the treatment by applying the compound nutrient solution is 25% -28 ℃ and the humidity is 75% -85%.
  7. 7. The method for improving the salt tolerance of asparagus seedlings according to claim 6, wherein the temperature of the treatment by applying the compound nutrient solution is 28 ℃ and the humidity is 85%.

Description

Method for improving salt tolerance of asparagus Technical Field The invention belongs to the technical field of crop cultivation, and particularly relates to a method for improving salt tolerance of asparagus seedlings. Background Asparagus (Asparagus of natural plants) is a perennial vegetable crop with rich nutrition and high economic value, and is widely planted worldwide at present, and is mainly concentrated in coastal areas, areas with moderate climate and rich soil such as California in the United states. However, in recent years, the problem of salinization of soil is increasingly serious under the influence of global climate change, irrational irrigation and agricultural management modes, and particularly in coastal areas, the content of soil salt continuously rises due to the effects of reverse seawater irrigation, ground water level rising and secondary salinization, and the content of soil salt is far beyond the natural tolerance critical value of asparagus. Research shows that the high-salt environment can obviously inhibit the growth and development of asparagus, and is characterized by reduced water absorption capacity of root systems, reduced photosynthetic efficiency, imbalance of ion balance and aggravated oxidative stress, and finally the rapid reduction of yield and the deterioration of quality are caused, so that the sustainable development of the asparagus industry is severely restricted. Although asparagus has a certain salt-tolerant basis, the asparagus has a limited tolerance range, obviously has growth resistance in soil with a salt content of more than 0.5%, and is difficult to adapt to increasingly worsened salinization environments. Therefore, how to effectively improve the salt tolerance of asparagus by an exogenous regulation means, so that normal physiological metabolism and yield formation can be maintained under high salt stress, and the method has become a key challenge for current asparagus breeding and cultivation technology research. At present, although the conventional salt-tolerant cultivation measures (such as soil improvement, salt-tolerant variety breeding and the like) have a certain effect, the problems of high cost, long period, insufficient adaptability and the like exist, and the large-scale popularization and application are difficult. In contrast, the exogenous addition of bioactive substances (such as plant hormone, osmotic regulator, antioxidant, etc.) can directly regulate physiological and biochemical responses of plants to quickly enhance salt tolerance, and has the advantages of simple operation, controllable cost, wide applicability, etc. However, the salt tolerance induction method for the asparagus is still deficient in the prior art, so that a method for improving the salt tolerance of the asparagus with high efficiency and safety is developed, and the method has important significance for relieving the threat of salinization to agricultural production and promoting the high-efficiency utilization of saline-alkali soil resources. Disclosure of Invention In order to solve the problems, the invention provides a method for improving the salt tolerance of asparagus seedlings, and the method can be used for obviously improving the stressed state of the asparagus seedlings under salt stress by exogenously applying a compound nutrient solution rich in 12.74 mg/L-14.57 mg/L selenium and 0.02 mg/L-0.06 mg/L silicon. In order to achieve the above purpose, the specific technical scheme of the invention is as follows: The first aspect of the invention provides a method for improving the salt tolerance of asparagus seedlings, which comprises the steps of applying a compound nutrient solution rich in 12.74 mg/L-14.57 mg/L selenium and 0.02 mg/L-0.06 mg/L silicon to the asparagus seedlings, wherein the dosage of the compound nutrient solution is 1.1 square/mu-1.4 square/mu in a single application. Preferably, each liter of the compound nutrient solution contains 0.02-0.06 mg of active ingredients and ：Ca(NO3)2·4H2O 660 mg~760 mg、Mg(NO3)2·6H2O 120 mg~220 mg、MgSO4·7H2O 200 mg~300 mg、KNO3460 mg~560 mg、NH4H2PO4180 mg~280 mg、K2SiO370 mg~80 mg、H3BO31.15 mg~1.35 mg、CuSO4·5H2O 0.115 mg~0.135 mg、Fe-EDTA 3.0 mg~5.0 mg、MnSO4·4H2O 2.0 mg~2.4 mg、H2MoO40.06 mg~0.10 mg、ZnSO4·7H2O 1.00 mg~1.30 mg、 mg of pure Se. Preferably, each liter of the compound nutrient solution contains effective components and the content of the effective components is ：Ca(NO3)2·4H2O 710mg、Mg(NO3)2·6H2O 170 mg、MgSO4·7H2O 250 mg、KNO3510 mg、NH4H2PO4230 mg、K2SiO377 mg、H3BO31.24 mg、CuSO4·5H2O 0.124mg、Fe-EDTA 4.0 mg、MnSO4·4H2O 2.2 mg、H2MoO40.08 mg、ZnSO4·7H2O 1.15 mg、 pure Se 0.04 mg. Preferably, the compound nutrient solution improves the salt tolerance of asparagus seedlings by improving the photosynthesis capacity of the asparagus seedlings. Preferably, the compound nutrient solution is applied by irrigation or spraying. Preferably, the compound nutrient solution is applied to the asparagus seedlings ever