Preparation method of soil-based gelatinized starch composite water retention material for preservation of soil moisture
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A technology of water-retaining material and starch, which is applied in the preparation of soil-based starch composite water-retaining materials and the preparation of soil-based gelatinized starch composite water-retaining materials, which can solve the problems of refractory degradation, white pollution of plastic film, and high price
Inactive Publication Date: 2019-08-20
NORTHWEST NORMAL UNIVERSITY
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However, the plastic film will cause white polluti
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Embodiment 1
[0039] Embodiment one, the preparation of soil-based gelatinized potato starch composite material
[0040] 1) After removing impurities, loess and clay are mixed at a mass ratio of 1:2, dried, crushed to 100-200 mesh, and set aside;
[0041] 2) Take 100g of potato starch, add 900g of tap water, gelatinize at 80°C for 60 minutes, then add 1000g of mixed soil, stir at room temperature at a stirring speed of 600 r / min for 60 minutes, granulate and dry , that is, soil-based gelatinized potato starch composite material.
Embodiment 2
[0042] Embodiment two, the preparation of soil-based gelatinized sweet potato starch composite material
[0043] 1) After removing impurities, loess and clay are mixed at a mass ratio of 1:2, dried, crushed to 100-200 mesh, and set aside;
[0044] 2) Take 80g of sweet potato starch, add 850g of tap water, gelatinize at 95°C for 30min, then add 1000g of mixed soil, stir at room temperature at a stirring speed of 300r / min for 120min, granulate and dry, that is Soil-based gelatinized sweet potato starch composite material was obtained.
Embodiment 3
[0045] Embodiment three, the preparation of soil-based gelatinized tapioca starch composite material
[0046] 1) After removing impurities, loess and clay are mixed at a mass ratio of 1:2, dried, crushed to 100-200 mesh, and set aside;
[0047] 2) Take 50g of tapioca starch, add 800g of tap water, gelatinize at 65°C for 60 minutes, then add 1000g of mixed soil, stir at room temperature at a stirring speed of 400 r / min for 90 minutes, granulate, and dry. The soil-based gelatinized tapioca starch composite material is obtained.
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Abstract
The invention discloses a preparation method of a soil-based gelatinized starch composite water retention material for preservation of soil moisture, comprising the following steps: carrying out hydrothermal gelatinization on starch and mixing the gelatinized starch with composite soil, mechanically stirring uniformly at room temperature for full functioning, pelletizing and drying to obtain the soil-based gelatinized starch composite water retention material. By using the natural inorganic clay and loess as the raw material, production cost of the composite material can be greatly reduced. Inaddition, clay and loess can provide essential nutrient substances for psammophytes to promote rapid growth of psammophytes. With the long-chain structure of starch and its strong hydrophilic group,the material is endowed with cohesiveness; after gelatinization of starch, the activity of the starch is improved, and the starch performs better weak interaction with soil particles. Thus, the gelatinized starch has stronger adhesion, has more excellent performance of preventing water evaporation of soil, and can effectively control water evaporation of soil and improve ecological functions of soil. Thereby, the purpose of preservation of soil moisture for plant growth is achieved, and growth of vegetation or crops is promoted.
Description
technical field [0001] The invention relates to a preparation method of a soil-based starch composite water-retaining material, in particular to a preparation method of a soil-based gelatinized starch composite water-retaining material used for soil moisture conservation, and belongs to the technical field of composite materials and the technical field of water and soil conservation. Background technique [0002] Soil moisture is the main limiting factor for vegetation survival and development in arid regions. During the growth and development of vegetation, atmospheric rainfall is an important source of soil water recharge. Soil evaporation and infiltration after precipitation are two basic links in the soil water cycle. Soil evaporation varies with crop species and meteorological conditions. Rainfall infiltration determines the distribution characteristics of soil moisture, which in turn affects the growth and stability of vegetation. Global warming has changed the glob...
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