Iron deficiency causes
Alkali in the soil, too dry or too wet, ground temperature is low, excess copper, manganese, phosphorus, iron deficiency phenomenon will occur.Prevention: keep the soil moist, too dry or too wet, and reduce the basic fertilizer surueyed.Iron deficiency can timely spraying on the leaf 0.1 after a 0.5% aqueous solution of ferrous sulfate.
Zinc deficiency causes
Alkali soil, high zinc content is not easy to absorb;Light intensity big easy zinc deficiency;Phosphorus influence the more the zinc.If prevention: don't partial excessive phosphorus, zinc spraying on the leaf 0.1 a 0.2% aqueous solution of zinc sulfate.
Copper deficiency causes
Alkali soil is easy to lack of copper.Prevention: use acid fertilizers in soil, the lack of copper spraying on the leaf 0, 03% of copper sulfate solution.
Boron deficiency causes
Thin soil drought, and alkali, and famine, excessive potassium application, will affect the boron absorption.Prevention: timely watering, increasing organic fertilizer, improve soil fertility, increasing boron fertilizer application.Spraying on the leaf 0.12 b in a 0.25% aqueous solution of boric acid or borax.
Molybdenum deficiency causes
Containing active manganese, iron content in the soil on the high side, sulphur fertilizer more (such as calcium phosphorus, sulfur, etc.), can inhibit the absorption of molybdenum, molybdenum deficiency phenomenon.Prevention: increasing organic fertilizer and basic fertilizer in soil, reduce the acidification, molybdenum deficiency can spraying on the leaf of 0.01-0.1% molybdenum acid aqueous solution.
Manganese deficiency causes
The low content of soil organic matter, alkali and salt concentration on the high side, it's easy to have a manganese deficiency phenomenon.Prevention: scientific fertilization of chemical fertilizer, nothing to fertilizers, soil concentration is too high, pay attention to the increasing organic fertilizer application, activation soil.
