1. Fertilizer as basic fertilizer or top dressing: Under normal circumstances, the amount of zinc sulfate is 1-2 kg/mu; borax is 0.3-0.5 kg/mu; and ferrous sulfate is 1-2 kg/mu.
2. Fertilizer foliar fertilizer: spraying concentration of zinc sulfate is 0.05-0.3%; borax is 0.05-0.2%; calcium fertilizer is 0.1-0.3%; ferrous sulfate is 0.5-1.5%. Generally can spray 2-3 times, every 7-10 days.
3, fertilizer to do seed fertilizer: zinc sulfate soaking concentration of 0.02-0.05%, seed dressing with 2-6 grams per kilogram of seed; borax generally used 0.02-0.05% concentration soaking; ammonium molybdate soaking concentration of 0.05-0.1 %, seed dressing with 3-5 grams per kilogram of seed.
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