Irrigation and fertilization method for agricultural planting

Abstract

The invention discloses an irrigation and fertilization method for agricultural planting and relates to the technical field of agricultural planting. The method comprises the following steps: measuring the thickness of a planting surface soil layer; performing sampling, measuring and calculation so as to obtain the pH value, the water content and the nitrogen potassium phosphorus content of the surface soil layer; determining a water irrigation amount; performing calculation so as to obtain the amount of a pH value regulator and amounts of a nitrogen fertilizer, a potash fertilizer and a phosphorus fertilizer to be added into quantitative irrigation water; preparing an irrigation liquid; and performing sampling, measuring the content of moisture of soil of each stage of soil layers, drawing a discrete point diagram of moisture contents and soil layer depths in a two-dimensional coordinate system, and performing linear fitting so as to obtain a linear regression equation to obtain a relationship parameter K. The thickness of the planting surface soil layer, the pH value, the water content and the nitrogen potassium phosphorus content, the water content of the surface soil layer is measured at different levels, the irrigation liquid is prepared to implement irrigation, the irrigation speed is controlled, and loss of water sources, fertilizers and energy can be avoided.

Description

technical field [0001] The invention belongs to the technical field of agricultural planting, in particular to an irrigation and fertilization method for agricultural planting. Background technique [0002] As the world's largest fertilizer producer and consumer, China's agricultural fertilizer utilization rate is at a low level. At the same time, China is also a country with a relatively low agricultural water resource utilization rate, which is only 1 / 2 of that of developed countries. In addition, China is still a country with severe drought and water shortage. After deducting the difficult-to-use floods and groundwater resources scattered in remote areas, the actual amount of fresh water resources available in China is even less, and the effective irrigation area of ​​my country's farmland ranks first in the world. With the increasingly serious situation of water shortage and the low utilization rate of agricultural irrigation water in our country, the integrated water and...

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Problems solved by technology

[0004] In this way, the irrigation speed cannot be controlled according to different soil moisture, and the irrigation water volume cannot be accurately determined according to the thickness of different cultivated soil layers; at the same time, when the surface soil of the topsoil layer is relatively wet and the soil in the middle of the topsoil layer is relatively dry, too fast irrigation speed will easily lead to Irrigation water cannot quickly penetrate into the topsoil and cause water loss. Water loss will also cause nutrient and soil loss, which is not conducive to the growth of crops, and also wastes water, fertilizer and irrigation energy.

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