Slow release water-retaining compound fertilizer and preparation method thereof

Abstract

The invention discloses a slow release water-retaining compound fertilizer and a preparation method thereof. The slow release water-retaining compound fertilizer comprises the following components in parts by weight: urea, wheat straw, peony seed meal, attapulgite powder, diatomite, polylactic acid, EM bactericide, earthworm cast, peat, pond sludge, sodium humate, chitosan, ferrous chloride, potassium dihydrogen phosphate, N,N-methylene bisacrylamide, sodium alginate and right amount of water. The slow release water-retaining compound fertilizer is added with the conventional bacterial fertilizer and inorganic chemical fertilizer synergistic microbial active ingredients, a multi-layer coating slow release structure is adopted, and liquid mulching film functional ingredients are coated on the outer layer, so that slow nutrient release performance and water retaining effects are realized, and multiple resources such as carbon and nitrogen can be provided for soil after degradation; and meanwhile, the effects of stimulating plant growth and development, enhancing the stress resistance of crops and improving the nutritional state of the plants are realized, bioactive ingredients at the inner layer are synergistic, the soil structure is further improved, the fertilizer effect is fully played, the plant growth is promoted, and the crop yield is increased.

Description

technical field [0001] The invention relates to the technical field of slow-release fertilizers, in particular to a slow-release water-retaining compound fertilizer and a preparation method thereof. Background technique [0002] At present, there are generally three kinds of agricultural fertilizers in the Chinese market: one is chemical raw material fertilizer, one is organic fertilizer, and the other is chemical raw material and organic fertilizer mixed fertilizer; the disadvantage of chemical raw material: long-term use will cause land soil compaction, Affect the growth of crops, resulting in a gradual reduction in production; the disadvantages of organic fertilizers are: the nutrients required by plants are insufficient to meet the needs of crop production; they affect crop yields; the disadvantages of mixed fertilizers: the organic matter and total nutrients in the fertilizer formula are contradictory, so High and low, if the organic matter content is too high, it is di...

AI Technical Summary

Problems solved by technology

[0002] At present, there are generally three kinds of agricultural fertilizers in the Chinese market: one is chemical raw material fertilizer, one is organic fertilizer, and the other is chemical raw material and organic fertilizer mixed fertilizer; the disadvantage of chemical raw material: long-term use will cause land soil compaction, Affect the growth of crops, resulting in a gradual reduction in production; the disadvantages of organic fertilizers are: the nutrients required by plants are insufficient to meet the needs of crop production; they affect crop yields; the disadvantages of mixed fertilizers: the organic matter and total nutrients in the fertilizer formula are contradictory, so High and low, if the organic matter content is too high, it is difficult to produce granules

[0003] Mulch film has the functions of heat preservation, water retention, and frost protection for crops. The application of mulch film technology has greatly improved and increased the yield and benefit of crops. However, traditional mulch film is a synthetic polymer compound that is almost non-degradable in the natural state. If it is not treated after use, it will cause great pollution to the soil environment and affect the growth of crop roots. However, the treated plastic film cannot be recycled due to moisture and damage. It can only be recycled as garbage, which is labor-consuming and time-consuming.