Plant ash-polyglutamic acid granule compound fertilizer and preparation method thereof
A technology of polyglutamic acid and plant ash, which is applied in nitrogen fertilizer, potash fertilizer, inorganic fertilizer, etc., can solve the problem of high broken rate of fertilizer particles, achieve the effect of improving utilization rate, reducing pollutants, and bringing economic benefits
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[0038] As mentioned above, plant ash is light and alkaline. It is easy to go with the wind when it is dry, and it is easy to go with water when it is wet. It is easy to cause nitrogen volatilization loss when it contacts with nitrogen fertilizer, and the powder form is not suitable for existing agricultural mechanized production process. Therefore, plant ash needs to be shaped and processed to prepare granular fertilizers. However, the plant ash-polyglutamic acid granular compound fertilizer products currently on the market all have problems such as low particle forming degree, small hardness, and uneven size, which make their breakage rate high during transportation and application, especially mechanical application. The efficiency is low. For addressing these problems, the present inventor has carried out a large amount of researches to plant ash fertilizer.
[0039] The present inventors have found that through the bonding effect of silicon dioxide and other salts in the ...
Embodiment 1
[0076] Embodiment 1: preparation plant ash-polyglutamic acid fertilizer
[0077] Add 6.00g plant ash in the 50ml beaker, then add the polyglutamic acid fermented liquid 9.5g (containing the polyglutamic acid dry matter 0.0665g that molecular weight is 800000-1000000Da) that concentration is 0.7wt%, add appropriate amount of water and stir evenly, Pour into molds. Use a 20-ton press to squeeze out excess water for compaction, then put it into an oven, bake at 100° C., and dry for 10 hours to obtain plant ash-polyglutamic acid granule compound fertilizer.
[0078] According to the test results, the granule forming effect is very good; the moisture content is 3.15%, and the water content of the product is normal; the granule strength is 22N, and the product has a good compressive effect; the time for the granule fertilizer to completely disintegrate is 26 days, and the disintegration effect and slow release effect are still high. Can.
Embodiment 2
[0080] Add 6.00g plant ash to a 50ml beaker, then add 0.33g of cross-linked polyglutamic acid (polyglutamic acid with a molecular weight of 800000-1000000Da, using ethylenediamine as a crosslinking agent), and add an appropriate amount of water to stir to make plant ash Bond with cross-linked polyglutamic acid and pour into molds. Use a 20-ton press to squeeze out excess water for compaction, then put it into an oven, bake at 100° C., and dry for 10 hours to obtain plant ash-polyglutamic acid gel granule compound fertilizer.
[0081] According to the experimental results, the granule forming effect is very good; the moisture content is 6.25%, and the water content of the product is normal; the granule strength is 25N, and the product has a good compressive effect; the time for the granule fertilizer to completely collapse is 33 days, and the collapse effect and slow release effect are relatively good. it is good.
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