Can you interplant soybean with yellow tobacco?

Flue-cured tobacco does not grow well in the field because of drought. It is one of the effective ways to stabilize grain and increase income in rural areas to make full use of the natural advantages of abundant light, heat and water in autumn and vigorously promote the interplanting of autumn soybeans in tobacco fields. So can you interplant soybeans with yellow tobacco? Introduction is as follows.

1. Land selection: Intercropping with ground tobacco is the main method. Intercropping with tobacco in the field should reduce the planting density, otherwise the flue-cured tobacco will grow too well, the field will be shaded, the light will be insufficient, the soybean will grow poorly and the yield will be low.

2. Variety: autumn soybean interplanting flue-cured tobacco. The growth time of soybean in the field is only about 100 days, so it is necessary to choose varieties with short plant type, compact upright and uniform pods. Judging from the existing varieties in the province, Beifeng 1 1, Ji 25 and Yu Kai 10 are more suitable for interplanting. The plant height of Bei 1 1 is 40 ~ 50 cm in the 90-day growth period, with no branching, with an average of 2 pods per plant 10 pod. The growth period of Jilin 25 is 90 ~ 100 days, the plant height is 50 ~ 60 cm, and it is unbranched, with an average plant 10 ~ 12 pods and an average of 2.2 pods per pod. The growth period of Kay 10 is about 100 days, the plant height is 80 ~ 90 cm, with 6 ~ 7 branches, slightly scattered plant type, scattered pods and many pods. This variety is suitable for furrow mulching.

Third, the sowing date: there are three standards to choose from. First, the management of flue-cured tobacco after intertillage; 2, after threshing the flue-cured tobacco leaves; March is from June 20th to July 10th. The suitable interplanting time can be determined according to the local climatic conditions and the selected varieties in each region. According to local practical experience, interplanting can be carried out at the altitude of 1600 ~ 1800 m in early July, and at the altitude of 1900 ~ 2000 m in June 20 ~ 30.

4. Intercropping mode: In the field with poor tobacco growth, it is best to sow on both sides of wet surface of flue-cured tobacco; In places with good tobacco growth and high altitude (above 1800 meters), because the interplanting time is early, it should be interplanted in ridges and ditches. The soil is planted on both sides of the soil moisture surface. The varieties Beifeng 1 1 and Jilin 25 are better. The distance between ponds is 25 ~ 30 cm. Five plants are planted in each pond and interplanted in the ditch. This variety can be selected from Yu Kai 10 and planted in double-row triangle. The spacing between ponds is 30-35cm, and 2-3 plants are planted in each pond. The density per mu is 3000 ~ 4000 ponds, and the amount of seeds used per mu is 3 ~ 4 kg. Sow in a soil moisture pool without applying seed fertilizer; The furrow seeder can apply 8 ~ 10 kg of compound fertilizer or 0/5 ~ 20 kg of calcium superphosphate/kloc-0 as seed fertilizer per mu.

5. Make full use of plastic film mulching for tobacco field interplanting: If it is a flue-cured tobacco cultivated by plastic film mulching, you can make full use of plastic film mulching and punch holes in the films on both sides of flue-cured tobacco moisture, which can increase the accumulated temperature, uniformly adjust the moisture, obviously shorten the growth period of soybeans and increase the yield.

6. Field management: Weeding is divided into two stages, the first stage is combined with intertillage management of flue-cured tobacco before interplanting, and the second stage is manual weeding in the middle period of soybean growth. Rodents are mainly killed at seedling stage, and measures such as rodenticide, manual killing and mechanical killing can be taken. Insecticide is mainly used to control tobacco flea beetle and leaf beetle, and can be sprayed with 2500-3000 times chrysanthemum vinegar emulsion or 1500-2000 times omethoate. The control effect of tobacco flea beetle is better in nymph stage, and the control effect of leaf roller is better in the peak period of egg incubation.