Peanut and corn intercropping used to be very common in our local area. Many of them intercropped two rows of corn with four rows of peanuts, and some of them planted three to five rows of peanuts in one row of corn. The planting of corn should be strictly controlled to avoid the corn growing too high and affecting the ventilation of peanuts. The distance between peanuts and corn should be increased appropriately, because corn needs a large amount of fertilizer, and its ability to absorb fertilizer is stronger than that of peanuts. Generally, the peanut near the corn row is worse than other rows.

peanuts should be well protected against water and pollution. Intercropping corn with peanuts can improve iron nutrition of pigs and nitrogen fixation activity of peanut nodules. Mycorrhiza forms a hyphal bridge between the roots of different plants and promotes the exchange of root substances between species. In order to study whether there is interaction between iron and nitrogen in interspecific nodules of maize and peanut intercropping system. Can pseudobacillus root inoculation promote the absorption of iron and nitrogen by corn and peanut? In this experiment, the 2: 4 model of corn intercropping with peanuts was taken as the research object, and the intercropping corn was treated with non-chemical and chemical treatments without phosphorus application.

The contents and accumulation of iron and nitrogen in plant organs of maize and peanut, and the absorption and distribution of iron and nitrogen were studied, which provided theoretical basis for giving full play to the nutritional advantages of iron and nitrogen in intercropping system and further realizing the nutritional utilization of maize and peanut. At the same time, the effects of Candida on iron and nitrogen nutrition between maize and peanut were discussed. The results showed that the yield advantage of corn and peanut intercropping was between 1656 kg-hm-2 and 3426 kg-hm-2. After chemical control of corn, the yield of corn decreased slightly, but the yield of peanut increased obviously.

the yield advantage of phosphorus-free intercropping is 238 kg-hm-2~2551 kg-hm-2, which is 5.74%~23.11% higher than that of non-chemical control. Compared with no phosphorus application, phosphorus application can improve LAI, photosynthetic matter accumulation and yield of chemical control intercropping corn and peanut, and the yield of chemical control intercropping corn increases by 12.49% ~ 14.47%, with a significant difference. The yield of chemical controlled peanuts increased by 1.82% ~ 9.75%, and the yield advantage of chemical controlled peanuts was 2377 kg ha-2 ~ 2794 kg ha-2, which was 9.52% ~ 16.63% higher than that of no P application.