A fertilization method for alleviating secondary salinization of facility soil

A technology of secondary salinization and fertilization method, which is applied in the field of fertilization to alleviate secondary salinization of soil, which can solve the problems of reducing soluble salt content, secondary salinization of facility soil, and high salt content, so as to reduce excessive accumulation , avoid secondary salinization of soil, and reduce the effect of excessive accumulation

Active Publication Date: 2020-11-27
JIANGSU ACAD OF AGRI SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to reduce the use of chemical fertilizers in protected vegetable cultivation, my country vigorously promotes the technology of increasing the application of organic fertilizers to replace chemical fertilizers. However, since most organic fertilizers use livestock and poultry manure as raw materials, and most of the livestock and poultry manure has a high salt content, it is bound to be damaged if it is used in large quantities for a long time. Exacerbate the occurrence of secondary salinization of facility soil
If the soluble salt content is reduced only by slowing down the accumulation of soil salt to the soil surface or by increasing the adsorption of soluble salt by the soil, this problem cannot be solved fundamentally.
Applying low-salt organic fertilizer while reducing chemical fertilizer application can reduce the introduction of salt from the source. However, there is no report on the application of low-salt organic fertilizer and its supporting chemical fertilizer application technology.

Method used

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  • A fertilization method for alleviating secondary salinization of facility soil
  • A fertilization method for alleviating secondary salinization of facility soil
  • A fertilization method for alleviating secondary salinization of facility soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1 Preparation and conductivity detection of low-salt organic fertilizer

[0023] Organic fertilizers for testing: traditional Chinese medicine residue organic fertilizer, pig manure organic fertilizer, chicken manure organic fertilizer, cow dung organic fertilizer;

[0024] The preparation method of traditional Chinese medicine dregs organic fertilizer is as follows: taking the production of 1000kg low-salt organic fertilizer as an example, the specific steps are as follows:

[0025] Composting raw materials: fresh Chinese medicine dregs;

[0026] High-temperature composting: determine the ratio of compost raw materials according to different types of traditional Chinese medicine dregs and their carbon-to-nitrogen ratio nutrient content (the traditional Chinese medicine dregs in this example mainly include Poria cocos, moutan bark, cassia twig, and peach kernels, and mix them with equal mass), carbon The nitrogen ratio is adjusted to 25, the water content is ad...

Embodiment 2

[0032] Example 2 Field application effect of low-salt organic fertilizer replacing chemical fertilizer technology in greenhouse peppers

[0033] The experiment was conducted in the chili plastic greenhouse in Wharf Town, Huai'an City, Jiangsu Province, from September to December 2017.

[0034] The test crop is pepper, and the variety is Xianhong 1.

[0035] Experimental group: compost traditional Chinese medicine dregs (in this embodiment, mix poria cocos: Moutan bark: cassia twig: peach kernel, etc.), adjust the carbon-nitrogen ratio to 25, adjust the water to 60%, and then carry out high temperature (50-65 ℃) aerobic fermentation, the high temperature time lasts for 50 days, and the pile is turned over every 3 days when the temperature of the pile exceeds 50°C. Low-salt organic fertilizer.

[0036] After testing, the conductivity of the low-salt organic fertilizer obtained in this example is 2.9 mS / cm, N 2.6%, P 2 o 5 1.8%, K 2 O1.7%, organic matter 46.4%, moisture 30%...

Embodiment 3

[0049] Example 3 The field application effect of the balanced application technology of special water-soluble fertilizer for vegetables

[0050] The experiment was conducted in the chili plastic greenhouse in Wharf Town, Huai'an City, Jiangsu Province, from April to August 2017.

[0051] The test crop is hot pepper, the variety is Sujiao No.17.

[0052] Fertilizers tested: compound fertilizer (15-15-15), compound fertilizer (17-17-17), both purchased from Kingenta Group; high-nitrogen water-soluble fertilizer (22-12-16), high-potassium water-soluble fertilizer (19- 6-25), all purchased from the Chinese Academy of Agricultural Sciences; potash fertilizer (K 2 O 52%), purchased from Shandong Qingshang Chemical Co., Ltd.

[0053] Control group: 6-8 days before transplanting, apply 8 cubic meters of fresh cow dung and 50kg of compound fertilizer (15-15-15) per mu as base fertilizer, and topdress water-soluble fertilizer per mu (16-0-20) 49 days after transplanting 5kg / mu, topdr...

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Abstract

The invention discloses a fertilizing method for relieving secondary salinization of greenhouse soil. The fertilizing method comprises a technology of replacing chemical fertilizer with low-salt organic fertilizer and a technology of balanced application of water-soluble fertilizer, and specifically comprises the following steps: applying 800-1,000 kg of low-salt organic fertilizer and 10-15 kg ofurea to each mu, 6-8 days before crop transplantation; dressing 5-7 kg of high-nitrogen water-soluble fertilizer (22-12-16) on each mu in the middle stage of crop growth, and dressing 10-13 kg of high-potassium water-soluble fertilizer (19-6-25) on each mu in the later stage of crop growth, wherein the dressing is performed in a drip irrigation way. According to the method disclosed by the invention, by applying low-salt organic fertilizer instead of chemical fertilizer to the greenhouse soil, the application of salt in the organic fertilizer can be reduced, and secondary salinization of thesoil caused by long-term application of organic fertilizer is avoided; meanwhile, by coupling the applying technology of low-salt organic fertilizer with the balanced application technology of special water-soluble fertilizer, the yield can be increased by 0.2-45% while reducing the application of chemical fertilizer by 30-60%, and excessive accumulation of quick-acting nutrients in the soil is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of soil nutrient management, in particular to a fertilization technology for alleviating secondary salinization of soil under the condition of balanced application of low-salt organic fertilizer and special water-soluble fertilizer for vegetables. [0002] technical background [0003] During the planting of protected vegetables in our country, the phenomenon of unreasonable fertilization and excessive fertilization is serious. Studies have shown that the content of available nutrients (nitrogen and phosphorus) in vegetable fields in my country far exceeds the environmental threshold of soil available nutrients, which is several times or even dozens of times that of surrounding farmlands, and there is a high risk of nutrient leaching. Therefore, when the amount of available nutrients in the soil is greater than the amount absorbed by plants, the excess nutrients will accumulate in the soil. When the amount ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01C21/00A01B79/02
CPCA01B79/02A01C21/00
Inventor 王秋君马艳郭德杰
Owner JIANGSU ACAD OF AGRI SCI
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