Paddy fields are mainly concentrated in the southern plains and basin hills, with flat terrain, deep soil layer and fertile soil, but the production process is complex, labor intensity is high and more labor is needed. So what crops should be interplanted in rice fields? How to dig ditches and drain water?

First, how to dig ditches for drainage?

After harrowing, the depth of each field is 10- 15cm, and there are 3 vertical ditches 1 strip, and the total horizontal ditch is deep every 3 Milla vertical ditches 1 strip; The whole site should be flat, and the height difference of the site should be within 3 cm. Before sowing rice, the water layer on the field surface should be removed to prevent the seeds from dying due to flooding and lack of oxygen in the field pond.

Second, how to interplant other crops?

Intercropping watermelon, potato and corn in rural paddy fields, reserving watermelon holes when planting potatoes in winter, sowing watermelon before potato harvest and interplanting corn after potato harvest, finally achieving the objective benefit of three harvests a year.

① Different sowing dates of crops. The reproductive period should be one morning and one night. The main crops mature later and the lateral crops mature earlier, which is beneficial to harvest. The main crops get enough light energy in the later stage and get high yield. For example, interplanting watermelon, potato and corn, reserving watermelon holes when planting potatoes in winter, sowing watermelon before potato harvest and interplanting corn after potato harvest, finally achieving the objective benefit of three harvests a year.

(2) According to the different planting densities, distinguish the densities of main and secondary crops in production and labor to ensure that the main crops have enough space to achieve the advantage of increasing production.

③ The rational collocation of interplanting crops helps the two crops to help each other. For example, using the different root characteristics of two crops to ensure soil nutrition and sustainable development.