Rape is a common edible vegetable in our lives and a good crop for oil extraction. Many friends can't tell whether rapeseed and rapeseed are the same crop. In fact, rapeseed is just the flower that grows after rape grows, and it is the same crop. It is only the vegetable rape that we often eat has not been harvested until it has been flowered. The rapeseed that grows into rapeseed is often used to extract oil. The role of rapeseed is high, the benefits are high, and the number of people planted is also quite large. However, it is worth noting that rapeseed cultivation must pay attention to the sufficient boron content. If the soil lacks effective boron, it will cause rapeseed to “atrophy and diseaseâ€, which has a great impact on the yield. The application of borax has a significant effect on the yield increase of rapeseed. Below we will specifically talk about the application of boron to rapeseed cultivation.
First, the typical symptoms of oil shortage of boron
1. Root system is poorly developed, the roots are short and thick, the epidermis is brown, and the cortex is cracked;
2, the leaves are purple-red to blue-violet or blue-purple, the leaf lobes are thick, and the petiole veins are easy to break;
3. Cracks or cracks appear in the stem, and the growth point of the stem or shoot is dead;
4, the flower bud faded yellow, shrinking and dry, flowering is not normal.
Second, the soil is easy to lack boron
1. Red soil and brick red soil in the south;
2. Various soils developed from loess or red clay;
3. Sand soil;
4. Alkaline soil or acidic soil with a large amount of lime applied;
5, the application of more nitrogen fertilizer or soil drought is easy to lack boron.
Third, boron fertilizer application method
1, the bottom fertilizer boron
Boron is applied to soil with moderate or severe boron deficiency. Generally, boron fertilizer is applied before rapeseed sowing or transplanting. 0.5~1.0kg per acre is applied. After mixing with farm organic fertilizer, evenly apply or apply. Boron is directly contacted with seeds or young plants to prevent seeds or seedlings from inhibiting growth due to burns of boron.
2, foliar spray boron
Foliar sprayed boron is suitable for mild or moderate boron-deficient soils, and sprayed once in rapeseed seedlings and convulsions.
(1) Spraying boron at the seedling stage: It is advisable to spray before 5 pieces of true leaves. Apply 100g of borax to 50kg per acre of field, first dissolve the borax with 50°C hot water and then dilute with water. It can effectively promote root growth and facilitate flower bud differentiation.
(2) Spraying boron during the pumping period: When the rapeseed is bolted, 50g of borax per acre is sprayed with 40~50kg of water, which can promote the development of stolons, ensure the normal development of reproductive organs such as flower buds, and avoid "flowers and not real".
The above is the application of boron to rapeseed compiled by Huinong. The boron element is especially important for rapeseed cultivation. After discovering the lack of boron in rapeseed, boron fertilizer can be used for nutrient supplementation.
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