Crop stubble rotation sequence

1. Corn. Corn is a crop that needs more fertilizer; the requirement for the previous crop is not strict, but soybean stubble is the best, at the same time, corn is resistant to short-term continuous cropping, but in order to obtain higher yield, it is necessary to increase the amount of fertilizer when planting corn. There are few weeds in corn field, which is a good predecessor for many kinds of crops.

2. Sorghum. The root system of sorghum is deep in the soil and can absorb nutrients and water from the deep soil. Bean stubble is the best in the previous stubble, but it is not easy to continue and meet the stubble. Corn or soybeans can be deducted from sorghum stubble.

3. Millet. Millet is a kind of shallow root crop, but its root system is relatively developed, its ability to absorb fertilizer and water is very strong, and it grows slowly in seedling stage, so it is easy to be damaged by weeds, so it is better to choose soybean or corn stubble with fertile soil and less weeds, but it should not be replanted or meet the stubble, so as not to cause seedling famine and reduce yield. Stubble floor hard, low fertility, generally can be deducted to grow crops such as soybeans or corn.

4. Wheat. Corn and soybean should be the best in the previous stubble of wheat, and continuous cropping can be carried out, but they can not be planted on stubble to prevent grass shortage.

5. Soybean. The root system of soybean goes deep into the soil and absorbs nutrients and water in the deep layer of the soil, which can increase the nitrogen in the soil, improve the soil structure, restore and improve the soil fertility. Soybean field has few weeds and high fertility, so it is a good predecessor for many crops. Soybean is not suitable for continuous cropping, as the saying goes: oil sees oil for three years. Therefore, the rotation system of soybean should be carried out for more than three years.

6. Beet. The root system of sugarbeet is very large, it is deep in the soil, it absorbs more nutrients and water than other crops, and it is strict to the previous crop. It is usually suitable for wheat, corn, soybean and other crops stubble, but it can not be continuous cropping. Generally, it can be rotated for more than four to five years. Sugar beet stubble has low fertility and cold pulp. on the basis of increasing the application of manure, wheat, corn and other crops can be planted.

7. Sunflowers. Sunflower is a kind of oil crop with tall plant and developed root system, which needs a lot of nutrients and water, and the nutrient requirement is one to two times higher than that of cereal crops. Its previous crop should be corn, sorghum or millet, not continuous cropping, generally five to six years of rotation. Liu Tong