Intercropping in flue-cured tobacco fields is a practical planting method for getting multiple harvests from one piece of land

Intercropping in flue-cured tobacco fields means using the open space between tobacco rows, or the idle time and soil fertility left after the tobacco leaves are harvested, to grow one more season of other crops without affecting the normal growth, harvesting and curing of the flue-cured tobacco. This practice is fairly common in the major tobacco-growing areas. It makes fuller use of the land, sunlight and heat resources, achieving multiple harvests from one piece of land.

The choice of intercrop should take local climate and crop rotation scheduling into account. In practice, soybeans, mung beans and other legumes, sweet potatoes, and vegetables such as radish, Chinese cabbage and peas are most often chosen; some growers also plant green manure crops after the tobacco to build up soil fertility. Intercropping is generally scheduled after the lower leaves of the tobacco plants have been harvested or in the middle-to-late stage of leaf harvesting and curing. At this point the ventilation and light conditions in the field improve, the shading cast by the tobacco plants over the rows is reduced, and this favors the establishment and growth of the intercrop seedlings.

When intercropping, pay attention to row spacing and density, leaving reasonable growing space for both crops so they do not compete for light and nutrients. In field management, the fertilizer and water needs of both crops should be taken into account, with topdressing and irrigation arranged as a whole. When applying pesticides, also watch out for the safety of the chemicals to the intercrop and for the pre-harvest interval, to prevent pesticide residue problems.

The value of intercropping in flue-cured tobacco fields lies mainly in two aspects: increasing income and nourishing the soil. An extra season of crop directly increases tobacco growers' income, while planting legumes or green manure can also fix nitrogen, build soil fertility and improve the soil, easing the obstacles caused by continuous tobacco cropping. Note that the intercrop should preferably not share pests and diseases with the flue-cured tobacco, and tall or overly dense species should not be chosen, so as not to affect the growth of the tobacco plants and the quality of the tobacco leaves.