Method for rapidly improving activity of phosphorus left in soil by applying sulfide

Abstract

The invention is suitable for the field of activation of soil remaining phosphorus, and provides a method for rapidly improving the activity of soil remaining phosphorus by applying sulfide, which comprises the following steps: (1) a treatment method of test soil; (2) controlling the input amount of sulfide and the culture time; and (3) specific measures of soil culture. According to the method, a mode of externally adding sulfide is adopted, the sulfide reacts with iron oxide combined with P in the soil, P is released, inorganic phosphorus components in the soil are changed, insoluble phosphate Fe-P is promoted to be converted into components Sol-P and Al-P with higher effectiveness, and the content of rapidly available phosphorus in the soil is increased, so that the activity of phosphorus left in the soil is improved; inorganic sulfide which can be purchased on the market is used as a conditioning tool and is easy to obtain and simple to operate, and meanwhile, the soil sulfur nutrient is supplemented; in addition, no fertilizer is needed in the implementation process, and the method is low in cost and easy to accept and has actual popularization value.

Description

technical field [0001] The invention belongs to the technical field of soil residual phosphorus activation, and in particular relates to a method for rapidly improving soil residual phosphorus activity by applying sulfide. Background technique [0002] Phosphorus is an indispensable element in life activities and plays an important role in plant photosynthesis, respiration and biosynthesis. The phosphorus required for plant growth mainly comes from the phosphorus pool of the soil, but most of the phosphorus in the soil exists in the form of insoluble phosphate, which has low availability and is difficult to be absorbed and utilized by plants. Therefore, the utilization rate of phosphorus in the soil by plants is very low. This seriously affects the growth of crops, especially the yield of crops, so phosphorus was once considered an important factor limiting the high yield of crops. Studies have shown that the seasonal utilization rate of phosphorus fertilizers in most areas...

AI Technical Summary

Problems solved by technology

The phosphorus required for plant growth mainly comes from the phosphorus pool of the soil, but most of the phosphorus in the soil exists in the form of insoluble phosphate, which has low availability and is difficult to be absorbed and utilized by plants. Therefore, the utilization rate of phosphorus in the soil by plants is very low. This seriously affects the growth of crops, especially the yield of crops, so phosphorus was once considered an important factor limiting the high yield of crops

Studies have shown that the seasonal utilization rate of phosphorus fertilizers in most areas of my country is less than 25%, and a large amount of phosphorus exists in the soil in the form of different mineral-bound phosphorus. In order to meet the growing demand for food, my country has continuously applied large amounts of phosphorus fertilizers for many years to increase food production. As a result, the accumulation of phosphorus in farmland has increased significantly, and the phosphorus retained in the soil in a slow-acting state will migrate into the surface water body through surface runoff and become an important source of phosphorus in the surface water body, which will induce eutrophication of the water body, etc. problems, adversely affect water quality, and bring about many environmental problems

In addition, due to the continuous improvement of my country's atmospheric environmental protection, the sulfur cycle path through which sulfur-containing waste gas enters the atmosphere and enters the farmland soil system with rainwater has been cut off, which has led to sulfur deficiency symptoms in some farmland soils in my country, affecting crop growth and food production.

Images