Although rhizobia can provide nitrogen nutrition to crops, early in the growth of leguminous crops, rhizobia should also be supplemented with nitrogen fertilizer according to the appropriate amount of soil fertility. In addition, when the leguminous plants are transferred to the reproductive stage, a large amount of assimilation material accumulates to the seed, at which time the nodule declines and the nitrogen fixation weakens.

In addition, phosphorus is conducive to the development of root nodules and the ability to enhance nitrogen fixation of root nodules, so it is important to pay attention to the application of phosphate fertilizers.

The proper amount of potassium and calcium nutrition is conducive to the proliferation of microorganisms. The addition of Ca2+ under low pH conditions can make early nevus nodulation and increase the rate of nodulation. Therefore, when applying basal fertilizer, pay attention to the application of a certain amount of potassium fertilizer and Futaiwei calcium powder, supplement the potassium and calcium nutrition, and can adjust the soil pH environment.

Molybdenum is an indispensable element in the synthesis of nitrogenase by rhizobial bacteria. Molybdenum can strengthen the activity of rhizobia and promote the formation and growth of nodules. Therefore, it is recommended that the mixture of seedlings of rhizobium and molybdenum be mixed in a concentration of 0.1% to 0.05%. Meet the needs of crops for molybdenum nutrition. It should be noted that the concentration of any molybdenum and Rhizobium mixed seed dressing should not exceed 0.3%, otherwise it will inhibit certain rhizobia.

Boron is also a nutrient with a large demand for legumes. The boron nutrition can be supplemented with 500-1000 g/kg Borscht-Taifen Granules, or by boring 1000 times Boron solution before flowering and during the leaf stage.

Another study showed that iron nutrition affects the nodule count, root nodule weight, and nitrogen fixation activity. Iron is easily fixed in the soil. Spraying ferrous sulfate can easily be oxidized in the air. Therefore, high-efficiency additives such as bloom can be added during spraying, and the iron absorption efficiency can be effectively improved.

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