Boron-molybdenum foliar fertilizer and preparation method thereof
A technology of foliar fertilizer and boron fertilizer, applied in fertilization devices, fertilizer mixtures, silicon dioxide, etc., can solve problems such as inappropriateness, change of compound valence state, properties, lack of topdressing and supplementary nutrition, etc., to achieve enhanced retention , the effect of increasing production
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Embodiment 1
[0034] A boron-molybdenum foliage fertilizer, the addition amount of each component of the raw materials of the foliage fertilizer is: 85 parts of nano-silica sol, 35 parts of borax, 2 parts of ammonium molybdate and 0.2 part of chitosan.
[0035] A kind of preparation of nano silicon dioxide, its concrete method step is:
[0036] (1) Adopt cation exchange resin to directly filter the silicate solution through a multi-stage resin exchange column to remove metal ions in the silicate;
[0037] (2) add sulfuric acid solution and carry out acidification, obtain the active silicic acid solution that pH value is 3;
[0038] (3) Add the sodium hydroxide solution dropwise into the active silicic acid solution at a stirring speed of 800rpm until the pH reaches 9 and stop the dropwise addition, so that the silicic acid is gradually polymerized into silica particles under alkaline conditions. As the reaction time prolongs, the particle size of silica sol increases gradually, and the rea...
Embodiment 2
[0046] A boron-molybdenum foliage fertilizer, the addition amount of each component of the raw material of the foliage fertilizer is: 107 parts of nano-silica sol, 40 parts of boric acid, 3 parts of sodium molybdate and 0.3 part of polyvinylpyrrolidone.
[0047] A kind of preparation of nano silicon dioxide, its concrete method step is:
[0048] (1) Adopt cation exchange resin to directly filter the silicate solution through a multi-stage resin exchange column to remove metal ions in the silicate;
[0049] (2) add sulfuric acid solution and carry out acidification, obtain the active silicic acid solution that pH value is 4;
[0050] (3) Add the sodium hydroxide solution dropwise into the active silicic acid solution at a stirring speed of 1200rpm until the pH reaches 9 and stop the dropwise addition, so that the silicic acid is gradually polymerized into silica particles under alkaline conditions. As the reaction time prolongs, the particle size of silica sol increases gradua...
Embodiment 3
[0057] The boron-molybdenum foliar fertilizer prepared in Example 1 is sprayed on rice, and is divided into three treatments: spraying only at the jointing stage, spraying at both the jointing stage and the heading stage, and spraying at the jointing stage and the heading stage and the filling stage are all sprayed, and then a blank control is set, and the content of the pick in the brown rice is detected after the rice is mature, and the results are as shown in Table 1. It can be seen that the boron molybdenum leaf described in the present disclosure is sprayed at the jointing stage and the heading stage of the rice. The cadmium-reducing effect of surface fertilizer is the best, and the cadmium-reducing effect of spraying only at the jointing stage of rice is the smallest.
[0058] Table 1 The effect of spraying boron and molybdenum foliar fertilizer on rice at different growth stages to reduce cadmium
[0059]
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