What is soybean continuous cropping?

What is soybean continuous cropping and how to control it? The fundamental way to solve the harm of soybean continuous cropping is to adhere to a reasonable rotation system, which is inevitable under the current situation of soybean continuous cropping, the fundamental way to solve the harm of soybean continuous cropping is to reasonably reduce the proportion of soybean continuous cropping, minimize and properly meet soybean continuous cropping under the inevitable situation of soybean continuous cropping. Continuous cropping soybean can not be planted in wind-sandy saline-alkali soil areas, barren slopes and plots with serious cyst nematode, Sclerotinia sclerotiorum and root maggots. Pingchuan land and Erwa land with high content of organic matter can be selected to plant continuous cropping soybean, and the continuous cropping can only be repeated for one year. For those plots with late development and high content of organic matter, although they can be replanted properly, they should not be replanted for too many years. The research and practice of selecting varieties with strong stress resistance at home and abroad have proved that the selection of disease-resistant or disease-tolerant varieties is an effective measure to reduce the effect of continuous cropping on soybean yield and quality. In addition, reasonable collocation of different varieties and rotation of planting should be done to reduce the harm of continuous cropping. The change of varieties can effectively reduce the harm of continuous cropping. Reasonable tillage, increase fertilizer application, improve soybean growth environment soybean continuous cropping, especially continuous cropping in successive years, resulting in soil compaction and consolidation, lack of reasonable aggregate structure, and fertility decline. In soil tillage, we should adhere to the soil tillage system of the combination of loosening, turning, raking and rotation, and vigorously popularize the subsoiling tillage method. The application of organic fertilizer can not only balance the supply of soybean nutrition, but also improve the bad soil environment caused by continuous cropping, which is an effective measure to slow down the yield loss. Due to the decrease of available nitrogen content, scarcity of root nodules and weakening of nitrogen fixation capacity in continuous cropping land, the effect of topdressing nitrogen fertilizer in soybean seedling stage or flowering stage is quite obvious in the case of insufficient base nitrogen fertilizer. The yield of soybean can be increased by more than 10% by topdressing 30 murine 60 kg / ha urea at the three-leaf stage or 67.5 kg / ha at the first flowering stage. Due to the aggravation of diseases and insect pests and the deterioration of soil environment, the appropriate increase of sowing density is extremely disadvantageous to the growth of soybean and is easy to cause seedling shortage. Therefore, for the continuous cropping plots, it is necessary to appropriately increase the sowing amount, generally increase 8% Mur10% than the normal stubble soybean, and improve the sowing quality and increase the number of seedling protection plants. Strengthen field management and control diseases, insect pests and weeds if soybean grows poorly in the early stage, 10 kg of urea, 1500 g of potassium dihydrogen phosphate and 66 g of potassium sulfate per hectare are dissolved in 500kg water for foliar spraying. For the plots that do not use micro-fertilizer as seed fertilizer or do not use micro-fertilizer to mix seeds, micro-fertilizer can be sprayed properly. Click to see more soybean planting techniques click to see more food crop planting techniques