Detailed Explanation of Key Technical Points for Relay-Intercropping Corn Sowing
Improving sowing quality: To ensure full stands and strong seedlings of corn, generally apply 5 kg of diammonium phosphate and 1 kg of zinc sulfate per mu as seed fertilizer. Before sowing, spread out heaps of wheat straw evenly so as not to affect sowing and seedling emergence. When sowing, pay attention to the operating speed of the seeder to prevent missed sowing or sowing seeds on wheat stubble. Try to achieve "rows...
1. Varieties should be superior varieties with a growth period of 100-115 days, such as Dongdan 60, Sanbei 6, Jingyu 11, Jundan 22, etc. It is best to use coated seeds and sun the seeds before sowing.2. For relay-intercropping corn, early June is the suitable sowing period. If soil moisture is poor, irrigation can be carried out in combination with watering the wheat. The sowing rate is 2.5-3 kg per mu, and the sowing depth is 3-5 cm.
3. At sowing, apply basal fertilizer per mu of pure N 17-18 kg, P2O5 6-7 kg, K2O 13-15 kg, ZnSO4 1-2 kg. When sowing, pay attention to separating seed fertilizer from the seeds.
4. The row spacing of relay-intercropping corn depends on the width of the wheat strips. Generally, a density of 3000-3200 plants is required.
5. For relay-intercropped varieties, the main thing to watch for is the occurrence of the second-generation armyworm after wheat harvest. When armyworm occurs, 100 g of 90% trichlorfon crystal, 50 g of 20% phoxim, or pyrethroid pesticides, or 2.5% kung fu emulsifiable concentrate can be uniformly sprayed with water per mu. Control 1-2 times.