Soybeans can be divided into spring soybeans and summer soybeans according to the agro-ecological conditions and planting period of the place of origin. Fertilization and management should consider both the common fertilizer characteristics and fertilization principles, and also combine local specific production conditions to achieve local conditions.

Fertilizer characteristics

The flower-pod stage is the peak of nutrient uptake. The flower-pod stage is the peak of dry matter accumulation and the peak of nitrogen, phosphorus and potassium nutrient uptake, for example, from the end of branching to the early stage of blast, dry matter and nitrogen (N), phosphorus. (P2O5) The cumulative amount of nutrients accounted for 58.7% and 60.8% of the total growth period, respectively, so the initial flower is the key period for topdressing.

The amount of nitrogen required is large, but the amount of nitrogen required for the root-fixing nitrogen-fixing soybean is relatively large, which is 4.5 to 5 times of the phosphorus requirement; since the nodule can fix nitrogen, it can satisfy 40% to 60% of its own requirement, so the nitrogen fertilizer can be applied less. But can not be applied, because the root tumor grows before the lack of nitrogen fixation capacity. Need to pay attention to the amount of nitrogen should not be too large, otherwise it will inhibit biological nitrogen fixation.

The demand for calcium is large, and the sulfur content is high. For the molybdenum-deficient soybean, the demand for calcium is large, and the grain calcium content is more than 10 times that of wheat grain. Soybean is sulfur, and the application of potassium sulfate can improve the quality of soybean more than potassium chloride. Molybdenum contributes to nodule formation and enhances nitrogen fixation, and soybean is sensitive to molybdenum deficiency. Therefore, attention should be paid to the lack of trace elements in calcium, sulfur, molybdenum and the like and fertilization correction.

Intercropping with gramineous crops can prevent iron deficiency. For example, legumes and corn intercropping can be used to fix nitrogen. In addition to self-use, corn can be supplied. The roots of gramineous crops such as corn can secrete malic acid and have a strong ability to activate poorly soluble iron in the soil. Not only does it not lack iron, but the roots can also benefit from the weaker ability to activate soil iron.

It is easy to make soy deficiency and infect pests and diseases by adding to the teratogenic absorption of soil nutrients and the self-toxicity of root exudates (ie allelopathic effects). These problems are particularly prominent in soybean concentrated production areas such as Heilongjiang Province.

Fertilization principle

Improve fertilization technology Soybean fertilization should be combined with nitrogen, phosphorus and potassium. Nitrogen fertilizer should be applied less properly. Topdressing should focus on the initial flowering stage. Pay attention to the lack of medium and trace elements such as calcium, sulfur and molybdenum. Foliar fertilization and micro-fertilization can be adopted. Kinds of measures to solve; promote the use of rhizobial agents mixed seed dressing to improve the efficiency of nodulation; pay attention to the problem of soybean heavy licking and its relationship with fertilization. For heavy and inevitable plots, the amount of nitrogen fertilizer applied or the general-purpose compound fertilizer may be appropriately increased to compensate for the decrease in nitrogen fixation capacity caused by soybeans. However, the amount of nitrogen applied should not be too much, otherwise it will inhibit the nitrogen fixation.

Strengthen the comprehensive management combined with deep plowing soil preparation to promote the application of organic fertilizer. Spring soybeans can be deeply ploughed (about 20 cm) after the autumn harvest, and sowed in spring; summer soybeans can be deep-plowed before planting wheat, and shallow ploughing before planting beans; summer soybeans in northeast spring soybeans and yellow-yellow sea areas should be based on local climate and soil. And mechanized conditions, using different management modes such as tillage, sowing, fertilization, etc., unless mechanized stratified fertilization, the appropriate amount of nitrogen fertilizer should be applied at the initial flowering stage; cultivating soil and weeding should be carried out at the seedling stage; Comprehensive measures such as agricultural control, biological control and chemical control, prevention and control of downy mildew, viral diseases, bean moth, heartworm, bridgeworm, aphid, dodder and other diseases and insect pests.

Spring soybean and soybean summer

The main producing areas of spring soybeans in the producing areas and sowing areas include the three northeastern provinces and Inner Mongolia, especially in Heilongjiang Province. Spring soybeans are generally sown from late April to early May, and harvested from early to late September. The wheat and summer soybeans are mainly in the Huanghuaihai area. They are usually harvested from early to mid-June and harvested from late September to early October. .

Fertilization technology Northeastern China, especially Heilongjiang Province, has higher soil fertility and relatively less fertilization. Generally, there are mechanized sowing and fertilization conditions, which can be used for one-time layered fertilization. That is, all the fertilizers are separated from the seeds at the time of sowing, and the soil layers are applied to the soil layers of 5 cm and 10 cm, respectively, and the fertilization amounts of the upper and lower soil layers account for about 1/3 and 2/3, respectively. At the initial flowering stage, apply several times of urea solution (0.5%), potassium dihydrogen phosphate solution (0.1%~0.2%) and micro-fertilizer solution (0.05% ammonium molybdate), etc., and summer soybean in Huanghuaihai area. The fertilization technology can refer to the spring soybean in the northeast region, but its soil fertility, especially the potassium content is low, and it is mostly planted in the summer after harvesting of winter wheat, and harvested in autumn. Compared with spring soybean, summer soybean has short growth period and early flowering, and requires early harvesting. Therefore, the amount of fertilizer should be increased appropriately. In addition to base fertilizer or seed fertilizer, 3~5 kg of urea should be topdressed per acre at the initial flowering stage.

This article URL: Soybean Fertilization Characteristics and Fertilization Principles

Vacuum Rolling /Tumbling Machine

Vacuum Tumbler Machine, also known as vacuum marinating machine, is mainly used for processing mVacuum tumbling machine, using the principle of physical impact, makes meat pieces or fillings turn up and down in the drum to achieve quick massage and marinating. The marinade can be fully absorbed by meat, which enhances the binding power and water retention of meat and improves the elasticity and yield of products. eat, such as beef, lamb, chicken, duck,goose, pork, fish, eggs, vegetables, fruits, etc.