How to fertilize broad beans for high yield? Detailed technical points

Broad bean, also called Luohan bean, fava bean, or orchid bean, is a crop used for grain, vegetables, feed, and green manure. It is also a food that many friends like to eat, and it is an important legume plant in the south with extremely high economic value. When planting, if you want to achieve high yield, fertilization is essential. So how should broad beans be fertilized? Let's take a look.

1. Fertilizer requirements

Broad bean is a plant with a relatively large fertilizer demand. According to data, for every 100 kg of broad bean seeds produced, about 7-8 kg of pure nitrogen, 2 kg of phosphorus pentoxide, and 5 kg of potassium oxide are consumed. At the same time, its demand for various nutrients also differs during each growth period. It absorbs less in the early growth stage, but absorbs a larger amount at the flowering and podding stage. The nutrients absorbed at the flowering and podding stage account for about 50% of the entire growth period. If the supply of phosphorus and potassium fertilizer is insufficient at this time, it will affect the later yield. Therefore, if broad bean planting is to achieve high yield, fertilization is extremely critical.

2. Apply seed dressing fertilizer well

Before sowing, a seed fertilizer is generally applied once. Generally, when sowing, 2 grams of ammonium molybdate should be used per 1 kg of seeds for seed dressing, so that the seeds sprout as soon as possible. It can also promote the growth and development of the broad bean root system and root nodules, speed up seedling growth, help cultivate strong seedlings, improve cold resistance, and achieve increased yield.

3. Apply sufficient base fertilizer

When sowing, sufficient base fertilizer should be applied. The base fertilizer provides the nutrient supply for the entire growth period of broad beans, and its application amount accounts for more than 80% of the total fertilization amount. Apply 30-50 kg of calcium phosphate and 7-15 kg of potassium sulfate per mu. When applying base fertilizer, concentrate it at the broad bean roots, which can increase yield by 20%. At the same time, apply 1000-2000 kg of decomposed organic fertilizer or farmyard manure as base fertilizer, which can be done together with plowing. Mix it evenly with the soil to increase microbial activity, improve soil fertility, and achieve a relatively good yield-increasing effect.

4. Timely topdressing

The topdressing stages are mainly the seedling stage, branching stage, and flowering and podding stage. Apply nitrogen fertilizer at the seedling stage, applying 6-8 qian of ammonium bicarbonate or 2-3 kg of urea per mu. When applying, dilute with water to avoid burning the seedling roots due to high fertilizer concentration. Apply when 3-5 true leaves have grown. Fertilizing at the seedling stage can make the plants grow early and quickly and promote more branching. When the plants begin to branch, apply 8-10 kg of urea per mu as topdressing. At the flowering and podding stage, apply 8-10 kg of ammonium bicarbonate per mu, also diluted with water for irrigation, so that the plants bloom and set pods more and the yield is increased.

5. Foliar fertilization

In addition to topdressing, the plants also need foliar fertilization. Foliar fertilization is generally foliar spraying. At the full flowering stage, spray a 1% urea solution and a 0.2% boric acid solution. This can extend the function of the leaves so that photosynthesis can normally synthesize nutrients, avoiding premature aging of the plants due to insufficient nutrients. At the seed-filling stage, spray once more with 1% urea solution and 0.2% potassium dihydrogen phosphate solution, which can achieve an obvious yield-increasing effect.

The above are high-yield fertilization techniques for broad beans. I hope they can help you. If you want to learn more about broad bean cultivation knowledge, please follow us.