When will the rape be harvested? When will the rape be harvested?

Rapeseed harvest time is different in the east and west, south and north of China. The west of Shandong is before and after Xiaoman, the middle is in front of Mangzi, and Jiaodong is behind Mangzi. The harvest time in the south is similar to that of one-season rice.

It takes about 2 months for rape from long flowering period to the end of flowering period. After flowering, it will bear fruit and form rapeseed. When rapeseed matures for about a month, farmers can harvest it. We should seize the opportunity, neither too early nor too late.

If the pod is harvested too early, the yield and grain quality will be reduced; On the other hand, if the harvest is too late, the precocious pods are easy to crack and fall off, which also affects the yield and quality of rapeseed.

Look at the appearance: the pod is loquat yellow and the harvest is the same. Two-thirds of the pods in the whole field are yellow-green, and the pod in the middle of the main shaft is loquat. The suitable harvest time of rape is when the pod is still 1/3 green.

Extended data

Rape is mainly used as oil crops and sometimes as animal feed. In recent years, European rape has jumped to the second place (second only to soybean) in the cultivation of oil crops, and it is widely planted all over the world. Wild rape varieties contain a lot of sinapic acid, which will do harm to human health.

Therefore, Canada first cultivated a new variety of rape with low erucic acid and glucosinolate. At the same time, due to the energy crisis, low air pollution and its own renewability, more and more people use rapeseed oil as biofuel, making it a good green energy.

Generally speaking, oil content and protein content are the most important targets in the process of rapeseed breeding. In addition, stress-resistant breeding for different diseases and insect pests is also very important. Since 1990s, people have made great efforts to achieve these goals.

For example, commercial hybrid production based on genetic engineering pollen control system; Improving the oil and protein content in seeds and many other efforts. Because European rape has beautiful bright yellow flowers, it can also be used as an ornamental plant.

The way to change the characteristics of rape can be to cultivate its varieties through transgenic technology, so that these varieties can grow bigger flowers, more stable petals, lower plant height and grow more branches. Of course, the main difficulty in achieving all this is the process of selecting the desired target gene and recombining its DNA through genetic engineering.

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