A saline-alkali soil improver and its special microcapsule organic acid slow-release preparation

A technology of slow-release preparations and organic acids, applied in organic fertilizers, soil conditioning materials, applications, etc., can solve problems such as aggravation of salt damage, impact on crop yield, soil return to salt, etc., to reduce soil back to alkali, improve improvement effect, The effect of increasing crop yield

CN105001876BActive Publication Date: 2017-10-27BEIJING BOYICHENG SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2017-10-27

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Abstract

The present invention discloses a saline-alkali soil modifier and a special microcapsule-type organic acid slow-release preparation thereof. The special microcapsule-type organic acid slow-release preparation is prepared from the following components by weight: 100 parts of water, 1-80 parts of an organic acid, 10-50 parts of a copolymerization monomer, 0.2-10 parts of an emulsifier, 100-500 parts of an organic solvent and 0.05-5 parts of an initiator. The saline-alkali soil modifier comprises, by weight, 1-30 parts of the organic acid slow-release preparation and 60-90 parts of active calcium. Compared with the existing saline-alkali soil modifier in the prior art, the saline-alkali soil modifier of the present invention has the following advantages that the calcium ions are provided while the organic acid substances are slowly released, the salt damage caused by the applied soil modifier can be effectively reduced, the release time of the organic acid can be significantly prolonged, the saline-alkali soil modifier acts in the whole growing and developing period of crops, the continuous damage of salt accumulation and alkali accumulation on crops can be effectively reduced, crops can be protected from salt damage and alkali damage during the whole growth period, the crop yield can be improved, and the improving effect on the high saline-alkali soil can be comprehensively improved.
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Description

technical field

[0001] The invention relates to a soil improver, in particular to a saline-alkali soil improver and its special microcapsule organic acid slow-release preparation. Background technique

[0002] Saline-alkali land or saline soil is a general term for various types of soil affected by the saline-alkali components in the soil, including various saline soils and alkaline soils, and other types of soils with different degrees of salinization and alkalization (Dong Hezhong, 2010). When the accumulation of water-soluble salts in the soil surface or subsurface layer exceeds 1-2g / kg or the alkalization degree of the soil alkalization layer exceeds 5%, the soil belongs to the range of saline-alkali land. Saline-alkali land includes saline soil, alkaline soil and different degrees of salinized and alkalized soil (Yang Jinsong, 2005).

[0003] Saline-alkali soils are widely distributed in my country, mainly including coastal saline-alkali land in the east, saline-alkali...

Examples

Embodiment 1

[0043] Embodiment 1, preparation slow-release acetic acid, the organic acid preparation of malic acid and saline-alkali soil conditioner

[0044] One, prepare the organic acid preparation of slow-release acetic acid, malic acid

[0045] Prepare the organic acid sustained-release preparation according to the following steps:

[0046] (1) In a 400mL reactor, first add 100 parts of water, 10 parts of acetic acid, 15 parts of malic acid, 15 parts of acrylic acid, 15 parts of acrylamide, and 5 parts of emulsifier SPAN-80 in a weight ratio of 100 parts. Stir to obtain an aqueous phase.

[0047] (2) Add 150 parts of cyclohexane to the aqueous phase obtained in step (1), and shear and stir at 4000 rpm for 30 min to obtain an oil-water mixed phase.

[0048] (3) Under the protection of nitrogen, in the oil-water mixed phase obtained in step (2), add 0.5 parts of initiator azobisisobutyronitrile, raise the temperature at 60 degrees Celsius to slowly initiate the polymerization reaction...

Embodiment 2

[0059] Embodiment 2, the organic acid preparation of slow-release citric acid, salicylic acid and saline-alkali soil conditioner prepared

[0060] One, prepare the organic acid preparation of slow-release citric acid, salicylic acid

[0061] Prepare the organic acid sustained-release preparation according to the following steps:

[0062] (1) In a 400mL reactor, add 100 parts of water by weight, 10 parts of citric acid, 15 parts of salicylic acid, 15 parts of ammonium acrylate, 15 parts of acrylamide, and 5 parts of emulsifier Tween-60 , and uniformly stirred to obtain an aqueous phase.

[0063] (2) Add 150 parts of white oil to the water phase obtained in step (1), and shear and stir at 10,000 rpm for 20 minutes to obtain an oil-water mixed phase.

[0064] (3) Under nitrogen protection, in the oil-water mixed phase that step (2) obtains, add 1 part of initiator ammonium persulfate, raise the temperature at 60 degrees Celsius and slowly initiate polymerization, 1000rpm stirri...

Embodiment 3

[0075] Embodiment 3, preparation slow-release oxalic acid, the organic acid preparation of citric acid and saline-alkali soil conditioner

[0076] One, prepare the organic acid preparation of slow-release oxalic acid, citric acid

[0077] Prepare the organic acid sustained-release preparation according to the following steps:

[0078] (1) In a 400ml reactor, first add 100 parts of water by weight, 10 parts of oxalic acid, 15 parts of citric acid, 15 parts of methacrylic acid, 15 parts of acrylamide, and 3 parts of emulsifier Tween-60 , 2 parts of Nongru 100, stirred evenly to obtain the water phase.

[0079] (2) Add 150 parts of white oil to the water phase obtained in step (1), and shear and stir at 10,000 rpm for 20 minutes to obtain an oil-water mixed phase.

[0080] (3) Under the protection of nitrogen, add 1 part of initiator ammonium persulfate to the oil-water mixed phase obtained in step (2), raise the temperature to 60 degrees Celsius to slowly initiate the polymeri...