Why should boron fertilizer be applied when growing rapeseed? When is the best time to apply boron fertilizer to rapeseed?

Rapeseed is very common in our daily life. Many people will apply boron fertilizer to rapeseed in order to make it grow better. So why do we need to apply boron fertilizer to rapeseed? When is the best time to apply boron fertilizer to rapeseed? The following editor will explain them one by one, hoping to help you.

Why should boron fertilizer be applied when growing rapeseed?

Boron is a reproductive element and is closely related to the flower bud differentiation and seed formation of crops. In the last century, the rapeseed in the south only bloomed but did not produce rapeseed, which was caused by boron. Therefore, boron is very important for rapeseed to produce fruit. Where it is used for rapeseed, it is still necessary to pay attention to the supplementation of boron.

When is the best time to apply boron fertilizer to rapeseed?

Boron fertilizer is very important for the growth of rapeseed, so before sowing, boron fertilizer is used as base fertilizer to promote the development of the seedling root system, thereby improving the rapeseed seedlings' resistance to drought and disease.

During the growing period of rapeseed, if the plant lacks boron fertilizer, the leaves will turn brown and slowly die. Therefore, boron fertilizer should be sprayed on the leaves once during the growing period.

Spraying boron fertilizer once during the flowering period can effectively increase the fruit setting rate and fruit set rate of rapeseed and prevent empty and shriveled fruits. Boron fertilizer is crucial to the entire growth of rapeseed. If you want to ensure a good harvest of rapeseed, boron fertilizer is the key.

How to efficiently apply fertilizer to rapeseed

1. Apply sufficient basal fertilizer

The base fertilizer should be mainly organic fertilizer, supplemented by chemical fertilizer. Generally, 3000-4000 catties of farmyard manure or soil fertilizer, or 200-300 catties of high-quality decomposed commercial organic fertilizer, 50-80 catties of three-fifteen potassium sulfate compound fertilizer, and 2-3 catties of borax are applied per mu. The specific amount can be appropriately increased or decreased according to different yields. Note that the base fertilizer should be applied deeply and evenly distributed in the field.

2. Apply fertilizer to seedlings

Generally, urea of ​​about 10 catties per mu is applied from the time of transplanting to before wintering. For fields with insufficient basal fertilizer, 15-20 catties of high-nitrogen compound fertilizer can be applied per mu. It is recommended to apply fertilizer in holes or strips with soil covering, or to spread fertilizer before rain. Generally, it is necessary to apply fertilizer early if the growth is not good.

3. Topdressing should be carried out in time according to the growth trend

Generally, less or no stalk fertilizer can be applied if the plant is growing healthily. If the plant is growing poorly, it should be applied early. Generally, when the stalk is 15-30 cm high, urea of ​​about 15 catties per mu or high nitrogen compound fertilizer of about 20-30 catties can be applied in holes, strips, or before rain or irrigation. If the plant is growing well, topdressing can be done in the late stage of bolting or when the stalk is 30-50 cm high.

4. Apply fertilizer to flowers

During the flowering and podding stage, you can spray 50-100 grams of potassium dihydrogen phosphate plus 50 ml of American Star or alginate plus 2 grams of Bihu per mu, which will help increase grain weight and improve yield.