Reasonable Application Methods for Water-Soluble Fertilizers
Plants need to absorb various nutrients for growth and development. However, what determines crop yield is the nutrient factor present in the smallest relative amount in the soil, and yield also changes relatively within a certain limit as this factor increases or decreases. This is usually explained using a water-filled wooden bucket. The bucket is made of staves representing different nutrient contents and factors...
Small amounts, multiple applications; pay attention to balanceSmall amounts and multiple applications is the most important fertilization principle for water-soluble fertilizers. It matches the characteristic of plant roots absorbing nutrients continuously and reduces leaching losses caused by a single large application.
Water-soluble fertilizers are usually applied by watering, drenching, or through irrigation equipment. Especially under drip irrigation fertilization conditions, roots grow densely and in large amounts. At this time, dependence on the soil's nutrient supply decreases, and plants rely more on the nutrients provided through drip irrigation. There are higher requirements for the reasonable proportion and concentration of nutrients. If the formula is unbalanced, it will affect crop growth.
Irrigate reasonably; avoid excess
As for irrigation volume, generally it is enough to keep the root layer depth moist. Root layer depth varies greatly depending on the crop. You can dig open the soil at any time with a shovel to check the specific depth of the root layer. Excessive irrigation not only wastes water, but more seriously, nutrients are leached below the root layer, wasting fertilizer and reducing crop yield. In particular, urea and nitrate nitrogen fertilizers are extremely easy to lose with water. When applied in combination with other fertilizers, water-soluble fertilizers are usually only used as topdressing. Do not use water-soluble fertilizers to replace other fertilizers; use them in combination to reduce costs and give play to the advantages of various fertilizers.
Precautions for drip irrigation fertilization
First, when fertilizing through drip irrigation, drip clear water first, and begin fertilizing after the pipeline is full of water. Immediately after fertilization is finished, drip clear water for 20~30 minutes to discharge all the residual fertilizer solution in the pipeline. Second, long-term use of drip irrigation fertilization in greenhouses or glasshouses will cause salt accumulation on the surface, affecting root growth. Drip irrigation under film can be used to inhibit salt migration to the surface layer. Third, pay attention to the uniformity of fertilization. In principle, the slower the fertilization under drip irrigation, the better. Especially for elements with poor mobility in the soil, extending the fertilization time can greatly improve the utilization rate of difficult-to-move nutrients.