How to make weak rapeseed seedlings strong over the winter? What are the methods for early growth of rapeseed seedlings?

Rapeseed is a common vegetable in life. It is deeply loved by people because of its rich nutrition and its effects of widening the intestines, detoxifying and reducing swelling. However, many people have weak seedlings when planting. So what should we do if the rapeseed seedlings are weak? What are the methods for early growth of rapeseed seedlings during winter? The following editor will explain them one by one, hoping to help everyone.

How to strengthen weak rapeseed seedlings

1. Choose an appropriate sowing period. Taking the middle and lower reaches of the Yangtze River as an example, the sowing period for direct seeding rapeseed is preferably in early October.

2. The base fertilizer must be sufficient. For medium fertility fields, apply 30 kg of 15-15-15 compound fertilizer per mu;

3. Appropriate sowing amount, about 150 grams of seeds per mu. Too high a density is not suitable for cultivating strong seedlings;

4. Do a good job in preventing and controlling diseases and insect pests such as damping-off disease, aphids, flea beetles, and cabbage worms;

5. Depending on the seedling condition, use 7.5 kg of urea per mu to promote seedling growth at the three to five leaf stage;

What are the methods for early growth of rapeseed seedlings during winter?

In order to make rapeseed grow strong seedlings early during winter, sufficient base fertilizer should be applied, and the seedlings should be transplanted and cultivated in time. Fertilization should be carried out at the same time as watering. The amount of fertilizer applied during the seedling stage should be about 40% of the total fertilizer. When transplanting, pay attention to keeping the distance between plants uniform, generally 7 to 10 cm.

Which variety of rapeseed is better?

1. Brassica rapa

This type is also called small rapeseed or sweet rapeseed. The plant is short, the seedlings grow fast, and there are many fibrous roots; the base leaves are elliptical, oval or long oval, the leaves are upward, with many or few prickles, covered with wax powder or not, and grow on bracts; the branches are few or medium, the flowers are uneven in size, the petals overlap on both sides, and the self-fertility is very low.

2. Brassica juncea

This type is commonly known as high rapeseed, bitter rapeseed, spicy rapeseed or large rapeseed, and is native to western and northwestern my country. The plant is tall, loose in shape, with slender branches, high branches, many branches, and a well-developed taproot. The leaves at the base of the seedlings are small and narrow, lanceolate, with obvious petioles, wrinkled leaves, and with prickles and wax powder. The leaf margins are generally harp-shaped and have obvious serrations.

3. Brassica napus

Brassica napus, also known as foreign rapeseed, is native to Europe and Japan. This type of plant is tall or medium, with a well-developed root system, oval stems and leaves without lyre-shaped notches, elongated stems and leaves with obvious notches, and stalks and leaves half-amplexicaul. The leaf color is similar to cabbage, blue-green, and mostly covered with wax powder. The petals are large, yellow, and overlap when blooming.