Method for preparing self-controlled-release seaweed fertilizer capable of repairing saline-alkali soil
A technology of seaweed fertilizer and saline-alkali land, which is applied in the field of comprehensive utilization of seaweed active ingredients, can solve the problems of inability to realize quick-acting nutrients, long-acting needs, high cost, and large waste of fertilizer raw materials, so as to reduce labor intensity of fertilization, reduce water evaporation, The effect of preventing soil compaction
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Embodiment 1
[0029] Example 1 Preparation of self-slow-release saline-alkali soil improvement seaweed fertilizer
[0030] Specifically, the following steps are included:
[0031] (1) Raw material pretreatment: soak 100 kg of seaweed in water and wash it several times;
[0032] (2) Adjust the water content of the seaweed raw material after pretreatment to 40-50%, add acetic acid to adjust the pH to 4-7, add 3% cellulase, 1% pectinase, 2% non-algae according to the amount of enzyme / algae mass ratio Amylopolysaccharase, 1% papain, 1% helicase and temperature control 25 ~ 45 ℃ use multi-stage series enzymatic hydrolysis for 10 ~ 24h, the level of multi-stage series enzymatic hydrolysis is set to 6 levels, the temperature range of each level of enzymatic hydrolysis It is controlled between 25-45°C, the pH is controlled between 4-7, and the temperature gradually increases from the first level to the next level, while the pH value gradually decreases. After enzymatic hydrolysis, centrifuge;
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Embodiment 2
[0038] Example 2 Self-slow-release seaweed fertilizer water retention effect verification
[0039] Get implementation example 1 self slow-release saline-alkali soil improvement seaweed fertilizer, measure its impact on soil water retention. The soil without fertilizer particles has a water retention rate of about 35%, and after drying for 12 days in the natural state, almost loses all water; while the soil with 3%, 5% and 10% fertilizer particles respectively has a water retention rate of 55%. %, 78% and 93%, after drying for 12 days in the natural state, the water retention rate is still 42%, 57 and 77%. It can be seen that the self-slow-release seaweed fertilizer not only has a good water absorption capacity, but also has a good water retention capacity after being added to the soil. This characteristic of fertilizer granules is mainly due to the self-trehalose and its macromolecular cross-linked products in the seaweed fertilizer, which can absorb and store a large amount ...
Embodiment 3
[0040] Example 3 Self-slow-release seaweed fertilizer growth-promoting effect verification
[0041] The soil remediation agent prepared by the method of Example 1 is used for the planting of capsicum, eggplant, wax gourd, and is tested with common bio-organic fertilizer, except that the organic fertilizer used is different, other planting methods and planting conditions are all the same , to count their yield increases respectively. The results are shown in Table 1.
[0042] Table 1 adopts the soil remediation agent prepared by the method of embodiment 3 and farmyard manure field fertilizer effect comparative result
[0043]
[0044] As can be seen from Table 1, the test results show that the soil remediation agent obtained by the inventive method has been widely used in crops such as capsicum, eggplant, wax gourd, and can increase crop yield by more than 16.9-34.4% (Table 1). Compared with farmyard manure, the bio-organic fertilizer obtained by the method of the inventio...
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