Phosphate fertilizer is easily fixed by the soil, and the mobility in the soil is poor, and the crop is difficult to absorb and utilize. If it is mixed with animal manure and then piled up and fermented, and then applied to the ground as a base fertilizer, the yield increase effect is very obvious. The benefits are mainly reflected in the following points:
The first is to increase the fertilizer organic fertilizer to produce a large amount of organic acids in the process of decay, which can promote the decomposition and transformation of insoluble phosphorus, which is beneficial to the absorption and utilization of crop roots and reduce phosphorus fixation.
The second is to avoid burning seedlings of superphosphate containing more free acid, if directly applied, when the dosage is slightly larger, it is easy to burn and burn seedlings. This phenomenon can be avoided if the phosphate fertilizer is mixed with livestock manure for stacking.
The third is to increase the nutrient phosphorus fertilizer composition alone, while the organic fertilizer nutrient is complete. After mixing the two, it can not only meet the needs of crops for various nutrients, but also protect nitrogen with phosphorus, promote phosphorus with nitrogen, and reduce nitrogen volatilization.
The history of stone carving can be traced back to the middle of the Paleolithic Age, which is about 120000 years ago. Since then, stone carvings have been handed down to this day. In this long history, the creation of stone carving art has been constantly updated and improved. In different periods, there were great changes in the types and styles of stone carvings; Different needs, different aesthetic pursuits, different social environments and social systems are restricting the development and evolution of stone carving creation. The history of stone carving is not only the history of art, but also the history of rich cultural connotation. It is more vivid and real human history.
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