Lotus-rice-fish interculture technique

"Lotus-rice-fish" interculture refers to the mode of planting rice and rice during the growing period of lotus root. The following is a brief introduction of the related techniques.

1. Choose a reasonable place. Select plaster fields with sufficient water sources, strong water conservation capacity and medium fertility. Water quality field, cold soaking field and perennial root lotus field should not be selected.

two。 Choose a good seed. Lotus varieties with large grains, long flowering period and high yield should be selected; rice varieties with early or mid-maturity should be selected, such as Minkezao 8, Zhejiang Fu 218, etc.

3. Dig fish pits and fish ditches before planting lotus. The ② fish ditch is excavated along the ridge of the field, with a depth of 0.6m and a width of 1m, accounting for about 3% / 4% of the lotus field.

4. Control the amount of lotus root and plant it sparsely. There are 220 roots per mu with row spacing of 3.5 m × 4.5 m and 4 roots per hole. The teeth are arranged in east-west or north-south direction.

5. Control the interplanting area of rice. Rice was sown from March 20 to 23 and transplanted in mid-April. Sparse sowing in the seedling field, cultivating strong seedlings with tillers. The row spacing of rice plant is 13.3 cm × 16.7 cm. Seven rows of rice were interplanted in the middle of the lotus field, and five rows were planted around the ridge of the field. Too much interplanting will affect the yield of lotus root, too little will affect the yield of rice, in general, the area of interplanting rice accounts for about 1 of the lotus field area.

6. Reasonable stocking of fish species. In order to improve the survival rate of fish fry, it is required to be released before March 20. Usually 150 carp (7cm in length) and 50 tilapia (7cm in length) are released per mu, and lotus fields can also be used to raise summer flowers of the same year. The stocking period can be appropriate later, 200 grass carp and 200 carps per mu.

7. Points for attention. ① rice kept shallow water layer at the initial stage of transplanting, and gradually deepened the water layer of lotus field with the growth and height. ③ early rice was fertilized immediately after harvest, 40-50 kg of special lotus root fertilizer or 40-50 kg of three-element compound fertilizer was applied per mu, and ploughed and cut off after 4-5 days of irrigation, and then 40-50 cm deep flowing water was irrigated to ensure the high yield of lotus root. Fences and nets are set up at the gaps in the field of ④ to prevent fish from escaping.