Problems needing attention in soybean continuous cropping

We know that any action as long as serious continuous cropping will lead to problems, and the common problems are soil malnutrition, aggravation of diseases and insect pests, and serious yield reduction. The following editor will bring you some problems that you need to pay attention to in soybean continuous cropping. Let's get to know it.

1. Aggravation of diseases and insect pests

The most common problem of soybean continuous cropping is the aggravation of diseases and insect pests. The germs and eggs of the previous crop are parasitic in residual plants, weeds and soil. After replanting, they begin to occur as the temperature rises, and become more and more serious year by year. The common diseases are bacterial spot, black spot, bacterial blight, yellow blight and so on, among which nematode disease is serious. Nematode disease mainly harms the root system, resulting in poor plant growth, root necrosis in the later stage, and premature senescence of the plant. lead to a serious reduction in yield, serious may lead to no harvest.

2. Microbial toxicity

When the root system of soybean absorbs nutrients and water, it will also secrete an acidic substance, which is a toxic substance, which has a great impact on the growth of soybean. If it is rotation, the residual toxic substance in the soil is less, which has little effect on the plant, but if continuous cropping, the content of this toxic substance in the soil is relatively high, which will seriously affect the normal nutrition and metabolism of soybean and lead to poor root growth and development. as a result, the activity of rhizobium is weak, plant growth is inhibited, resulting in reduced yield.

3. Nutritional imbalance

As the continuous cropping of soybean will lead to excessive consumption of phosphorus in the soil, the effective ratio of nitrogen and phosphorus will be out of balance, affecting the growth of soybean. And the content of other trace elements will also gradually decline, resulting in yellow leaf drying, poor growth, plant dwarfism and other problems, which are mostly caused by the lack of nutrition of soybean. Therefore, the continuous cropping should be avoided as far as possible in soybean production, and it is best to implement the rotation mode with other crops for more than three years.

4. Continuous cropping and yield reduction

According to part-time work, the yield of soybean continuous cropping will be reduced by about 6%, 11%, 10%, 16%, 14%, 24% and more than 30% in one year, 14%, 24% and 30% in three years.

The above is the introduction of the problems that soybean continuous cropping needs to pay attention to. I hope it can help you. If you want to know more about it, please follow us.