Micro-fertilizer plays an indispensible role in peanut growth which NPK cannot replace. Spreading micro-fertilizer in a scientific way can ensure peanut good growth and high productivity.
Iron fertilizer: Every ton of dry peanut need to absorb 264g iron fertilizer. If peanut lacks iron when growing, the peanut plant will be short and has small branches, few flowers blossemed and has poor root system develpment. Spreading iron fertilizer on the earth lacking iron can improve peanut productivity about 10%. Iron fertilizer spreading methods: 1.As basic fertilizer,iron fertilizer is spread about 200-400g per mu during ploughing period; 2. As seed manure, before seeding, soak the seeds in 0.1% ferrous sulfate solution for 24 hours. Then fish them out, dry and sowing them. 3. Spraying outside the root, during peanut fruit growing period, spread peanut leaves surface with 0.2% ferrous sulfate solvent. Spreading it every 5-6 days and keep the frequency to 2-3 times.
Manganese fertilizer: Every ton of dry peanut need to absorb 39g manganese fertilizer. If manganese lacks, the leaves will be yellow. Spreading manganese in this kind of earth will improve productivity of 8%-11%. The spreading methods are: 1. As basic fertilizer,spead manganese sulfate 1.5-3kg at per mu at ploughing; 2. As seed fertilizer, before seeding, soak peanut seeds in 0.05%-0.1% manganese sulfate solution for 12-24 hours; 3. Spraying outside the root. Spread 0.1% manganese sulfate solution every 10-14 days during the period when after peanut planting 30-50 days and before the harvesting time of 15-20 days.
Zinc fertilizer: Every ton of dry peanut need to absorb 9g zinc fertilizer. If zinc lacks, there will be stripes of leaves which lose green nutrition and it often occurs close to stipe. Spreading zinc in this kind of earth can improve peanut productivity of 12.5%-13.2%. The spreading methods are: 1. As basic fertilizer, spread zinc sulfate 1kg per mu; 2. As seed fertilizer, before seeding, soak peanut seeds in 0.1%-0.5% zinc sulfate solution for 12 hours, then fish out, drying and sowing them.
Planting good quality peanuts, start from following the above micro-fertilizer spreading rules!