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Biodegradable sandy soil water-retention and fertilizer-retention agent

A water and fertilizer conservation, biodegradation technology, applied in the direction of soil conditioning materials, organic fertilizers, fertilization devices, etc., can solve the problems of affecting the healthy growth of crops, reducing soil aeration, poor biodegradability, etc., to reduce the frequency of watering and fertilization , Reduce cultivation cost, good biodegradability effect

Inactive Publication Date: 2018-03-16
茆莉娟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, although the commercially available water-retaining and fertilizer-retaining agents have a certain water-retaining and fertilizer-retaining ability, their biodegradability is poor. After long-term use, it is easy to reduce the air permeability of the soil, and even cause soil compaction, thereby affecting the healthy growth of crops.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Add 0.5wt% dilute sulfuric acid dropwise to 30g carboxymethyl-β-cyclodextrin under stirring until fully dissolved, then add 5gN-hydroxyethylacrylamide and 0.5g maleic anhydride graft compatibilizer, and Heat to reflux state and keep stirring for 3 hours, then transfer to 0-5°C environment and seal and stand for 2 hours, heat the obtained mixture again to reflux state and keep stirring for 15 minutes, naturally cool to room temperature and send it to a freeze dryer, dry the obtained solid through super Micro-grinding machine into fine powder, that is, modified cyclodextrin;

[0028] (2) Heat 10g of hydroxypropyl starch ether to 115-120°C and keep stirring for 10 minutes, then add 2g of trimethylolpropane triglycidyl ether and 0.5g of hydrolyzed polymaleic anhydride, and continue to keep stirring at 115-120°C 1h, cool naturally to 45-50°C, add boiling water of equal weight to the obtained mixture while stirring, continue stirring for 10 minutes, send the obtained mixe...

Embodiment 2

[0032] (1) Add 0.5wt% dilute sulfuric acid dropwise to 40g carboxymethyl-β-cyclodextrin under stirring until completely dissolved, then add 8g N-hydroxyethylacrylamide and 1g maleic anhydride graft compatibilizer, and heat Keep stirring for 4 hours in a reflux state, then transfer to a 0-5°C environment and seal it for 2 hours, heat the resulting mixture again to a reflux state, heat and stir for 15 minutes, naturally cool to room temperature, and send it to a freeze dryer. Grinding machine into fine powder, that is, modified cyclodextrin;

[0033] (2) Heat 15g of hydroxypropyl starch ether to 115-120°C and keep stirring for 10 minutes, then add 3g of trimethylolpropane triglycidyl ether and 0.5g of hydrolyzed polymaleic anhydride, and continue to keep stirring at 115-120°C 1h, cool naturally to 45-50°C, add boiling water of equal weight to the obtained mixture while stirring, continue stirring for 10 minutes, send the obtained mixed solution into a spray dryer, and dry the ob...

Embodiment 3

[0037] (1) Add 0.5wt% dilute sulfuric acid dropwise to 40g carboxymethyl-β-cyclodextrin under stirring until completely dissolved, then add 8g N-hydroxyethylacrylamide and 1g maleic anhydride graft compatibilizer, and heat Keep stirring for 4 hours in a reflux state, then transfer to a 0-5°C environment and seal it for 2 hours, heat the resulting mixture again to a reflux state, heat and stir for 15 minutes, naturally cool to room temperature, and send it to a freeze dryer. Grinding machine into fine powder, that is, modified cyclodextrin;

[0038] (2) Heat 15g of hydroxypropyl starch ether to 115-120°C and keep stirring for 10 minutes, then add 3g of trimethylolpropane triglycidyl ether and 0.5g of hydrolyzed polymaleic anhydride, and continue to keep stirring at 115-120°C 1h, cool naturally to 45-50°C, add boiling water of equal weight to the obtained mixture while stirring, continue stirring for 10 minutes, send the obtained mixed solution into a spray dryer, and dry the ob...

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Abstract

The invention discloses a biodegradable sandy soil water-retention and fertilizer-retention agent, and relates to the technical field of water-retention and fertilizer-retention agents. The biodegradable sandy soil water-retention and fertilizer-retention agent is prepared from the following raw materials in parts by weight: 30-40 parts of carboxymethyl-beta-cyclodextrin, 15-20 parts of soil levelpolyglutamic acid, 10-15 parts of hydroxypropyl starch ether, 5-10 parts of activated clay, 5-10 parts of N-hydroxyethyl acrylamide, 1-5 parts of trimethylolpropane triglycidyl ether, 1-5 parts of superfine magnesium oxide, 0.5-2 parts of hydrolytic polymaleic anhydride, 0.5-2 parts of a maleic anhydride grafted compatilizer and 0.5-2 parts of hydrogenated castor oil. The prepared water-retentionand fertilizer-retention agent is suitable for water-retention and fertilizer-retention treatment on sandy soil, the problem of severe water and fertility loss in the sandy soil can be solved effectively, thus, normal growth of crops is ensured, and irrigation frequency and fertilizer application frequency are reduced.

Description

Technical field: [0001] The invention relates to the technical field of water and fertilizer retention agents, in particular to a biodegradable water and fertilizer retention agent for sandy soil. Background technique: [0002] Sandy soil refers to soil that contains more sand particles and has a certain degree of cohesion. After compaction, it has good water stability, high strength and small capillary action. There is no cohesion between the particles, the nature is loose, and it is mainly composed of 0.075-2mm particles without plasticity. According to the composition of particle size, it can be divided into coarse sand, medium sand, fine sand and silt sand. [0003] Sandy soil has good air permeability, convenient cultivation, and is not easy to suffer from waterlogging, but has low nutrient content and poor fertilizer retention. Due to the larger and more gaps between sand grains in sandy soil, organic matter decomposes faster, and it is not conducive to the accumula...

Claims

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Application Information

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IPC IPC(8): C09K17/40C08F251/00C08F220/58C08F222/06C08B37/16C08G69/48C09K101/00
CPCC08B37/0012C08F251/00C08G69/48C09K17/40C09K2101/00C08F220/58C08F222/06
Inventor 茆莉娟
Owner 茆莉娟
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