Water-retaining slow-release fertilizer for saline-alkali soil improvement and preparation method thereof
A technology for saline-alkali land and slow-release fertilizer, which is applied to the field of water-retaining slow-release fertilizer for improving saline-alkali land and its preparation, can solve the problem that the soil pH and soil alkalinity cannot be effectively reduced at the same time, and the water retention, water holding and water-holding capacity of the soil cannot be effectively improved. , the ability and effect of reducing soil salinity, to achieve good nutrient release regulation function, reduce secondary damage, and achieve obvious effects of fertilizer conservation
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Embodiment 1
[0035] The water-retaining slow-release fertilizer for saline-alkali land improvement of the present invention includes the following raw materials in proportion by weight: 15 parts of maleic anhydride, 6 parts of phosphogypsum, 0.1 part of EDTA, 12 parts of biochemical fulvic acid, 15 parts of potassium humate, livestock and poultry 35 parts of fermented organic fertilizer, 8 parts of wood vinegar, 5 parts of peat, 4 parts of potassium feldspar, 5 parts of vermiculite, 80 parts of long-acting compound fertilizer and 1 part of water retaining agent;
[0036] Among them, the long-acting compound fertilizer includes 0.5 parts of γ-polyglutamic acid, 0.5 parts of urease inhibitor, 0.5 part of nitrification inhibitor and 78.5 parts of compound fertilizer;
[0037] The compound fertilizer used includes nitrogen, phosphorus pentoxide, potassium oxide, and a mixture of medium and trace elements. The content of each component is 35-45 parts of urea with a nitrogen content of 46%, 49% o...
Embodiment 2
[0050] The water-retaining slow-release fertilizer for saline-alkali land improvement of the present invention includes the following raw materials in proportion by weight: 20 parts of maleic anhydride, 10 parts of phosphogypsum, 2 parts of EDTA, 15 parts of biochemical fulvic acid, 25 parts of potassium humate, organic fermented organic fertilizer for livestock and poultry 40 parts of fertilizer, 12 parts of wood vinegar, 10 parts of peat, 6 parts of potassium feldspar, 8 parts of vermiculite, 120 parts of long-acting compound fertilizer and 5 parts of water retaining agent;
[0051] Among them, the long-acting compound fertilizer used includes 2 parts of γ-polyglutamic acid, 1.5 parts of urease inhibitor, 0.5 part of nitrification inhibitor and 116 parts of compound fertilizer;
[0052] The compound fertilizer used includes nitrogen, phosphorus pentoxide, potassium oxide, and a mixture of medium and trace elements. The content of each component is 35-45 parts of urea with a n...
Embodiment 3
[0059] The water-retaining slow-release fertilizer for saline-alkali land improvement of the present invention includes the following raw materials in proportion by weight: 18 parts of maleic anhydride, 8 parts of phosphogypsum, 1 part of EDTA, 13 parts of biochemical fulvic acid, 18 parts of potassium humate, organic 38 parts of fertilizer, 10 parts of wood vinegar, 8 parts of peat, 5 parts of potassium feldspar, 6 parts of vermiculite, 100 parts of long-acting compound fertilizer and 3 parts of water retaining agent;
[0060] The long-acting compound fertilizer includes 1.5 parts of γ-polyglutamic acid, 1 part of urease inhibitor, 0.5 part of nitrification inhibitor and 97 parts of compound fertilizer;
[0061] The compound fertilizer used includes nitrogen, phosphorus pentoxide, potassium oxide, and a mixture of medium and trace elements. The content of each component is 35-45 parts of urea with a nitrogen content of 46%, 49% of phosphorus pentoxide and nitrogen 10-22 parts...
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