Promoting energy-saving and environment-friendly water-soluble fertilizers (including liquid fertilizers) is conducive to greatly improving fertilizer utilization and achieving zero growth of fertilizers. As a large fertilizer producer, liquid fertilizer accounts for only a small proportion of the total fertilizer production in China, and its development prospects in China are limitless. The main varieties of liquid fertilizers are liquid foliar fertilizers and fertilization, while the production of clear fertilizers and suspended fertilizers based on NPK has just started.
There are 23,000 sprinklers in China, mainly used for potato, corn, pasture and wheat production. The application area of ​​the water spray belt is estimated to be over 100 million mu, of which the sub-membrane water belt is the most popular.
The distribution of drip irrigation area in Datian crop is about 37.7 million mu in Xinjiang, about 10 million mu in Inner Mongolia, 7 million mu in Liaoning, 3 million mu in Jilin, 2 million mu in Heilongjiang, 1 million mu in Gansu, 800,000 mu in Ningxia, and 1.5 million mu in other provinces. It is the "hardware" foundation for liquid fertilizers to become the mainstream fertilizer in the future. Today, this edition introduces the rational application of water-soluble fertilizers to overcome the “software†barriers used in liquid fertilizer fields.
Water-soluble fertilizers in our country actually refer to water-soluble compound fertilizers, including solid and liquid forms. Generally speaking, the water-soluble compound fertilizer formula is more reasonable, the nutrient is more yuan, and the crop is more targeted. However, irrational use in production can cause waste of fertilizer and even negative effects.
Reasonable application of basic requirements
A small amount of multiple application is the most important fertilization principle of water-soluble fertilizer, which is consistent with the characteristics of uninterrupted absorption of nutrients by plant roots, and reduces the leaching loss caused by one-time large-scale fertilization. A small amount of multiple application is the most important reason for the high utilization rate of water-soluble fertilizer. Generally, the amount per acre is 3~6 kg. There are fewer seedlings and more prosperous growth periods.
Note that nutrient-balanced water-soluble fertilizers are usually applied, drenched or applied by irrigation equipment. Especially under drip irrigation and fertilization conditions, the roots grow densely and in large quantities. At this time, the dependence on soil nutrient supply is reduced, and more depends on the nutrients provided by drip irrigation, especially in sandy soils, and the reasonable proportion of nutrients and The concentration has higher requirements. If the formula is not balanced, it will affect crop growth and produce deficiency syndrome.
Safe application prevents fertilizer from burning leaves and roots, especially sprinkler irrigation and micro-sprinkler fertilization, which is prone to leaf burning. Usually, the EC value of the soluble salt concentration of the fertilizer solution is controlled at 1~3ms/cm (milligram per centimeter), or 1~3kg per square water, which is equivalent to 350~1000 times dilution, or spray water once after spraying fertilizer. It is also necessary to prevent excessive concentration of burned roots when pouring.
Some growers add 70 kilograms of water-soluble fertilizer to the pineapple on one side of the water, causing the roots to die black. The safest method of production is to use a small amount of fertilizer to test and find that the concentration is reduced when there is damage to the blade. Some large growers can purchase hand-held conductivity meters to monitor fertilizer concentrations, especially in areas with high water source salinity concentrations.
Drip irrigation application precautions
When applying drip irrigation, first drop the water and start fertilizing after the pipe is filled with water. Immediately after the end of fertilization, the water is dripped for 20 to 30 minutes, and all the residual fertilizer in the pipeline is discharged (the conductivity meter can be used to monitor whether it is completely discharged).
If you do not wash the tube, you may grow lower plants or microorganisms such as moss and algae at the dripper to block the dripper. Especially in the case of long fertilization intervals, this situation is easy to occur. During the rainy season, the soil is not deficient in water. At this time, the fertilization requirement is fast. It is best to apply it within half an hour, and do not drip the water after fertilization. Or do not fertilize by drip irrigation, use soil surface to spread fertilizer. In the rainy season, the nitrogen fertilizer of the soil surface is mainly ammonium nitrogen fertilizer, and it is not suitable to use urea and nitrate nitrogen fertilizer.
This article URL: Water-soluble fertilizer use tips explain drip irrigation application notes
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