Water-retention fertilizer-maintenance slow release fertilizer and preparation method thereof
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A slow-release fertilizer and basal fertilizer technology, which is applied in fertilization devices, fertilizer mixtures, applications, etc., can solve the problems of high price, slow degradation of coating materials, unsustainable development, etc., and achieve the effect of increasing fertilizer content.
Inactive Publication Date: 2013-12-04
LINYI UNIVERSITY
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The most widely used slow-release fertilizers today are fertilizers coated with non-hydrophilic polymer materials, especially fertilizers coated with thermoplastic polymer materials. Although they can well meet the requirements of slow-release and controlled-release, this kind of Fertilizers are not only expensive, but also the coating material degrades slowly in the soil, which brings serious environmental pollution problems and does not meet the requirements of sustainable development
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Embodiment 1
[0011] Embodiment 1 A kind of preparation of water-retaining, fertilizer-preserving slow-release fertilizer
[0012] 1. Preparation of phosphoesterified hydroxyethyl cellulose
[0013] Hydroxyethyl cellulose and phosphoric acid carry out phospholipids and the phospholipidation rate is 5%-10%.
[0014] The phospholipidated hydroxyethyl cellulose is prepared according to the following process: soak the cellulose linters in 30% lye, take out and press after 0.5h, press until the ratio of alkaline water reaches 1:2.8, and then pulverize, and the pulverized alkali Put the cellulose into the reaction kettle, replace the air with nitrogen, and feed in cooled ethylene oxide. The reaction kettle is cooled and kept at 25°C for 2 hours to obtain crude hydroxyethyl cellulose. The crude product is washed with alcohol solvent, and neutralized by adding acetic acid PH=4~6, the product is washed with water, dehydrated, dried, crushed, the product is put into the reaction kettle, and concentr...
Embodiment 2
[0020] The slow-release fertilizer field use experiment of embodiment 2 water retention, fertilizer retention
[0021] The natural conditions of the test site of this project: the test field is located in the arid mountainous area in the northwest, with an altitude of 1650-1900 meters. Most of them are 10-degree gentle slope fields, and one is horizontal terraced fields. The soil is sandy loam, with uniform texture, loose structure, poor water retention and fertilizer retention. The potato growing period was from April to September in 2011, and the cumulative rainfall during the experiment was 249.1mm.
[0022] Test location: Pingcha Village, Yuanbian Township, Baiyin City
[0023] Fertilization time: potato tuber root expansion period, topdressing once on July 14, 2011
[0024] Application method: According to the dosage of 10 kg per mu, compound the compound fertilizer into a 1% aqueous solution, make an egg white-like fertilizer-containing hydrogel, and apply it evenly to...
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Abstract
The invention discloses a water-retention fertilizer-maintenance slow release fertilizer and a preparation method thereof, and belongs to the technology of water-retention fertilizer-maintenance slow release fertilizer. The water-retention fertilizer-maintenance slow release fertilizer comprises phospholipid hydroxyethyl cellulose, stem-grafting polyving akohol butenedioic acid monoester ammonium salt and base fertilizer, wherein the weight of the phospholipid hydroxyethyl cellulose accounts for 5-10% of the total weight of the water-retention fertilizer-maintenance slow release fertilizer, the weight of the stem-grafting polyving akohol butenedioic acid monoester ammonium salt accounts for 5-10% of the total weight of the water-retention fertilizer-maintenance slow release fertilizer, and the weight of the base fertilizer accounts for 80-90% of the total weight of the water-retention fertilizer-maintenance slow release fertilizer. The invention further provides the preparation method of the water-retention fertilizer-maintenance slow release fertilizer, and the method comprises the steps of enabling hydroxyethyl cellulose and phosphoric acid to be phospholipid, carrying out maleic anhydride monoester stem grafting after polymerization alcoholysis of vinyl acetate, and carrying out mixing or wrapping on the phospholipid hydroxyethyl cellulose, the stem-grafting polyving akohol butenedioic acid monoester ammonium salt and the base fertilizer. The water-retention fertilizer-maintenance slow release fertilizer is reasonable in design and safe and convenient to use.
Description
technical field [0001] The invention belongs to the technical field of fertilizers, in particular to a water-retaining and fertilizer-retaining slow-release fertilizer and a preparation method thereof. Background technique [0002] Water conservation and fertilizer conservation are very important issues in agricultural production. my country is a country with relatively poor water resources, with a per capita water resource of 2220 m 3 , about 1 / 4 of the world's per capita water resources, ranking 121st in the world (according to 1997 population statistics). In terms of spatial distribution, there are relatively large differences in the distribution between the north and the south and east and west; in terms of time distribution, the precipitation is limited and the inter-annual and intra-annual distribution is uneven. Therefore, saving irrigation water is as important as making full use of rainfall in both irrigated areas and dry areas. The common point is to obtain the m...
Claims
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