Soybean cultivation: why do soybeans have more empty pods?

Why are there so many empty pods in soybeans? Please introduce the main reasons for the empty pods of soybean are as follows: 1. The difference of varieties: early and middle maturity varieties generally blossom and bear pods better, while some late sowing varieties appear flowering without pods or shrunken seeds of empty pods. This is because during the flowering and podding period of soybeans, there was a continuous high temperature and drought from late July to the first and middle of August, with temperatures as high as 38 ℃. The suitable flowering temperature for soybeans is 22 ℃, and the suitable relative humidity is 70 Muth90%. Beyond this range, soybeans will not blossom or blossom less, or blossom unfruitfully. At the same time, soybean is a short-day crop, if the requirements for short-day light are not met, flower bud differentiation will stop. 2. Soybean continuous cropping: some fields will plant soybeans again this year, and empty pods and shrunken grains often appear due to lack of elements in the soil, especially boron deficiency. 3. Unscientific fertilization: in the soybean fields with partial application of nitrogen fertilizer and no application of potassium and phosphorus fertilizer, there were more phenomena of empty pods and shrunken grains. Due to lack of fertilizer and drought, the primitive bodies of flowers can be transformed into leaf buds. 4. Land consolidation: poor drainage also leads to empty pods and shrunken grains. Some farmers did not hoe the grass once after sowing, and the weeds grew taller than soybeans, and some fields or fields were seriously damaged by dodder. A dodder entangled about 100 soybeans, and the affected soybeans basically had no harvest. In some fields with poor drainage, the soil is hardened and the amount of pods is also greatly reduced. Methods for prevention and control of soybean empty pods: 1. Select soybean varieties suitable for local growth and development, identify the brand of soybean when purchasing seeds, have "three certificates" or not, and ask for and keep the invoices for seed purchase; 2, pay attention to crop rotation, avoid repeated cropping; 3. Pay attention to the formula bottom fertilizer, especially to prevent partial application of nitrogen fertilizer, must be combined with phosphorus and potassium fertilizer. (4) Fine soil preparation and sowing, good application of chemical herbicides to control diseases and pests, and (5) improvement of drainage and irrigation facilities to enable drainage and irrigation in the soybean field to ensure the "dry flower and wet board" during the flowering and podding stage of soybean. Click to get more soybean planting technology click to get more grain and oil crop planting technology