When is the best time to fertilize Dutch beans? How much fertilizer does one mu of land need? How?

Dutch bean is a common vegetable, which is deeply loved by people because of its high edible value and edible young pods, shoots and seeds, but in order to achieve high yield, it is necessary to do a good job of fertilization in addition to simple management skills. when will Dutch beans be fertilized? How much fertilizer does one mu of land need? How do you do that?

1. How much fertilizer does Dutch bean need per mu?

The Dutch bean needs the most nitrogen, its nodule has the effect of fixing nitrogen, can fix a large amount of nitrogen from the air, and absorb less nitrogen from the soil, so the Dutch bean absorbs the most potassium from the soil, followed by nitrogen and phosphorus.

Although Dutch bean has rhizobium and can fix nitrogen in soil and air, the activity of rhizobium in the initial stage is weak, so some nitrogen fertilizer is still needed at seedling stage. During the whole growing period, there is an adequate supply of nitrogen, phosphorus, potassium and other nutrient elements. Organic fertilizer is mainly applied in cultivation, and the application of phosphorus, potassium, boron, molybdenum and other fertilizers is beneficial to induce nodule growth and reproduction.

The Dutch bean was supplemented with nitrogen fertilizer at the seedling stage, phosphorus and potassium fertilizer at the peak growth stage, and paid attention to the application of molybdenum and manganese fertilizer. It is reported that for every 1000 kg of Dutch beans, nitrogen is 11.5kg, phosphorus is 1kg, potassium is 5.7kg, and the absorption ratio of nitrogen, phosphorus and potassium is 0.73. If tender pods are picked, the absorption will be reduced accordingly.

Second, how much basic fertilizer does Dutch bean need per mu of land?

Generally, before sowing, Dutch beans are applied with high-quality organic fertilizer 3000kg / mu, bio-organic compound fertilizer 100kg, urea 20kg, calcium superphosphate 25kg / mu, potassium sulfate 40kg, manganese sulfate 0.5kg / mu. Spread it on the surface, then turn into the ploughing layer, flatten, make beds or ridges, and prepare for sowing.

Third, how much topdressing is needed for Dutch beans per mu of land?

The fertilizer was applied once before flowering, before harvest and during the peak harvest period of Dutch beans, and 815kg of compound fertilizer or 15002500kg of rotten human feces was applied per mu.

After the Dutch bean is on the shelf, it can be combined with 60 kg compound fertilizer per mu during the flowering and podding period. The podding period is generally more than 25 days, and pods bear pods at the same time as they grow. When the leaves fade every 6-7 days after harvest, topdressing urea 3kg / mu should be sprinkled or irrigated with water, but urea should be kept at a certain distance from the root. After topdressing urea, it should be irrigated in time to prevent root burning. Fertilization depends on the fat and thin of the field, if the field is too thin, 15 kg compound fertilizer is used for base fertilizer, 20 kg compound fertilizer is used for returning to spring fertilizer, and 5 kg urea is used for topdressing 3 times. If the field is partial to fertilizer, 15 kg compound fertilizer is used for base fertilizer, 15 kg compound fertilizer is used for returning to spring fertilizer, topdressing 3 times, and 3 kg urea each time. Dutch beans have higher requirements for water, afraid of both drought and waterlogging, and the soil moisture should be kept at about 70%, especially during the flowering and podding period, which can not be short of water, otherwise it will cause flowers and pods to fall, such as pod shape and yield drought, we should pay attention to irrigation from the ditch.

4. How much foliar fertilizer is needed for Dutch beans per mu of land?

Check the seedling and replenish the seedling in time after the emergence of Dutch bean, when the seedling height is 30 cm, trace fertilizer can be applied outside the root, that is, in the sunny afternoon, the foliar surface is sprayed with 250-fold potassium dihydrogen phosphate solution, and then sprayed with 500-fold borax solution one week later.

According to the plant growth, amino acid fertilizer can be sprayed throughout the whole growth period of Dutch bean, which plays a good role in enhancing plant resistance and increasing yield.