When will the latest soybeans be sown?

Soybean is one of the most important food crops in China, commonly known as soybeans. It is an annual herb of leguminous soybeans. It is native to China and is made by wild soybeans through long-term directional selection, improvement and domestication. It has been cultivated in all parts of our country. It is most famous in Northeast China and is widely cultivated all over the world. Let's take a look at when soybeans will be sown.

Planting time of soybeans

The planting time of soybeans varies according to the weather, and the planting time is generally divided into spring sowing and summer sowing. Spring sowing takes place before and after the Qingming Festival, and the harvest time is September (August of the lunar calendar). Summer sowing takes place after wheat harvest and is harvested from late September to mid-October. In addition, there is another kind of soybeans in the northeast that sows a little later, but has little to do with the harvest time. Spring soybean in northern China was sown from April to May, Huang-Huai-Hai summer soybean was sown in June after wheat harvest, and summer soybean in southern China was sown from May to early June and autumn soybean from the end of July to early August.

Pre-sowing treatment of soybean

1. Soil preparation before sowing: soil preparation before sowing includes soil tillage, raking, pressing, etc., and different soil preparation techniques are different before sowing, such as ploughing, ridge cultivation, raking stubble, deep loosening and so on.

2. Irrigation before sowing: for the plots with poor soil moisture before sowing, those with irrigation conditions can be irrigated once 1-2 days before sowing, soaking the soil to facilitate seed germination after sowing.

3. Closed weeding: if the large area cultivation of soybeans is not managed in time, the weeds will be seriously harmed. Herbicides are often sprayed mechanically before sowing to control weeds in the field.

4. selected seeds: the germination rate and germination potential of improved varieties of soybeans are high, and the seedlings are neat and strong, so diseased grains, worm-eaten grains, small grains, blighted grains and broken seeds should be picked out before sowing.

5, seed treatment: soybean commonly used seed amount of 0.1-0.5% octane or 0.7% elixir powder or 0.3-0.4% carbendazim plus thiram or 0.3-0.5% carbendazim plus carbendazim.

Sowing methods of soybeans

1. Narrow row dense sowing method: narrowing ridge and increasing row and narrow row dense planting are active cultivation methods at home and abroad, changing 60-70 cm to 40-50 cm narrow-row dense planting, generally increasing production by 10% to 20%.

2. Equidistant hole sowing method: equidistant hole sowing improves the sowing efficiency and quality, the plant spacing is suitable, the plant distribution is reasonable, the individual growth is balanced, and the general yield is about 10% higher than that of strip sowing.

3. Double-strip sowing method: double-strip sowing method adopts mechanical flat sowing on the basis of deep turning fine soil preparation or raking stubble fine soil preparation, combined with mid-tillage and ridging after sowing.

4. Precision point sowing method: on the basis of turning and raking or ridging in autumn, clean the stubble, and use precision sowing machine or improved rake single grain, double grain flat sowing or ridge sowing on the original ridge.

5. Original ridge sowing method: in order to prevent soil moisture loss, sowing on the original ridge stubble plays an important role in drought resistance, soil moisture conservation, seedling conservation, as well as raising ground temperature and eliminating weeds.