Manganese deficiency symptoms in crops and solutions

Manganese is an activating agent of kinds of enzyme, and is an important part of photosynthesis, it can promote the chlorophyllous form and carbohydrate assimilation. So plants will decrease output obviously if manganese sulfate deficiency occurs.Some crops are sensitive to manganese, such as wheat, potato, onion, spinach, apple, strawberry and so on, some other crops like maize, rye are not very sensitive to manganese. 

1.Manganese deficiency symptoms in Maize:
Maize’s leaves will be soft and droop, and vein will lose green color when lacking of manganese sulfate, what’s worst, it will decrease the output even no any grain.

When maize lacks of manganese sulfate, the blade will occur yellow striation, and then wither gradually.　 

2.Manganese deficiency symptoms in Rice:

Rice’s plant will be short and with less tillers, the leaves will be thin and narrow, color will turn yellow and green when lacking of manganese sulfate, and then die gradually.

3.Manganese deficiency symptoms in others:

Other crops will occur similar symptoms when lacking of manganese, and effects will be good if applying some manganese fertilizer.

Generally, active manganese is treated as the leading indicator for soil’s supplying of manganese sulfate. It’s on extreme low level when below 5050mg/kg, 50mg/kg-100mg/kg is on low level, 100mg/kg-200mg/kg is on middle level, 200mg/kg-300mg/k is abundant. Applying some manganese sulfate will receive very good effects.

 Solutions to treat Manganese deficiency
Manganese sulfate is the most common Mn fertilizer, and is used in top application. Soaking seeds, seed dressing, soil seed manure and slightly soluble Mn fertilizer is used as base fertilizer. Thickness for top application is 0.05-0.1%, 0.3-0.4% for fruit trees, 0.03% for Leguminosae crops, and 0.1% for rice. When used in seeding dressing, 4g-16g manganese sulfate for every 1kg seeds are used for different crops. So does the soil seed manure.

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