Secondary fruiting technique of sweet pepper pruning and regeneration

The pruning and renewal of sweet pepper is to cut off 1-2 leaves of the second or third branch of sweet pepper in the late fruiting stage to promote the lateral branch to blossom and bear fruit again. Its advantage is that it does not need to go through the seedling stage after renewal, and the lateral branches directly with buds can blossom and bear fruit quickly, which is much earlier than that of replanting sweet pepper seedlings. The initial fruit quantity is large, and the plant is not easy to grow and easy to manage.

The first thing for pruning and renewal is to choose the variety with strong growth potential. The specific operations are as follows: both autumn and spring sweet peppers can adopt this technology. Autumn sweet pepper is generally carried out at the end of July and early August, while spring sweet pepper is carried out at the end of February and early March, that is, the normal planting time of greenhouse sweet pepper. The sweet pepper is pruned and renewed, leaving 5-6 leaves in the second or third branch and cut flat. The flat shear wound has the advantages of small area, fast healing and not easy to be infected with diseases. After the original fruiting main branch germinates a new bud of about 5cm, cut off the remaining branches.

The difference between sweet pepper pruning and replanting sweet pepper is that there is a large amount of initial fruit after pruning and renewal, so it is necessary to control the plant to promote the plant and promote the fruit. You should pay attention to the following points:

First of all, topdressing should be carried out immediately after pruning. Ridging cultivation of sweet pepper in the ridge and furrow per mu of rotten high-quality organic fertilizer 4 square, mixed with compound fertilizer 100 jin, and appropriate amount of rooting agent spread evenly to turn 15-20 cm, ridge ridge as far as possible not to turn, so as not to hurt too many roots. Sweet peppers cultivated in flat beds can be fertilized in the operation line. After fertilization and soil preparation of spring sweet pepper, plastic film should be covered again, which is beneficial to increase the ground temperature and reduce the humidity in the greenhouse. After fertilization, it is best to dark irrigation under the plastic film, and apply biological fertilizer that can promote root growth, such as anti-bacterial-968, Riat, essence and bacterial culture, to promote root growth.

Secondly, it is necessary to control the temperature and moisturize after pruning. The temperature is controlled at 25-30 ℃ in daytime and 16-20 ℃ at night. It is necessary to maintain a high temperature and humidity in the shed before the emergence of new branches to promote the germination of lateral branches. In spring, after growing new branches of 2-3 cm, we should see more light within the appropriate range of temperature to ensure that the new branches do not grow too long.

Due to the wound of the pruned plant and the high humidity in the shed, it is prone to disease. It is suggested that protective agents such as chlorothalonil or agricultural streptomycin should be sprayed once to prevent disease infection.

Thirdly, after the lateral branches germinate, it is easy to appear the phenomenon that the buds are too dense, so it is necessary to remove some weak branches and buds properly. When the tender shoots grew to about 10cm, 4 strong and pest-free branches were selected as fruiting branches.