How to cultivate hybrid rice with a variety of grains in ancient times?

One is dwarfing varieties, looking for mutant plants and crossing to optimize dwarfing.

Second, giving priority to close planting of rice can increase the total grain output.

The second is double-cropping rice, which adopts greenhouse seedling raising technology to avoid early rice seedling injury at low temperature. As long as the seedling raising technology is overcome, the total grain output can be greatly improved. Or plant rape oil and add a season of rice to make you have oil and water in your stomach and reduce your food intake. Vegetable oil and tea oil, this only occupies barren hills.

introduce

Rice is widely distributed all over the world, mainly composed of rice husk (glume) and brown rice (caryopsis). Except for Antarctica, a special region with extreme climate and environment, this tenacious plant is almost all over the world.

As far as its distribution in China is concerned, rice mainly grows in the south where the climate is relatively warm, and Heilongjiang is the northernmost boundary of its growing area.