What are the correct ways to use iron fertilizer?
Which crops are prone to iron deficiency? How many application methods are there for iron fertilizer? How can iron fertilizer be used for good results? The following brief introduction from Gengzhongbang Planting Network is for netizens' reference. Crops sensitive to iron include soybean, sorghum, sugar beet, spinach, tomato, apple, etc. Generally, grasses and other crops rarely...
Which crops are prone to iron deficiency? How many application methods are there for iron fertilizer? How can iron fertilizer be used for good results? The following brief introduction from Gengzhongbang Planting Network is for netizens' reference.Crops sensitive to iron include soybean, sorghum, sugar beet, spinach, tomato, apple, etc. In general, iron deficiency is rarely seen in grasses and other crops, while iron deficiency is relatively common in fruit trees.
At present, the most commonly used iron fertilizer in agricultural production is ferrous sulfate, generally applied by topdressing outside the roots. The concentration for foliar spraying of iron fertilizer is 0.2%-1%. For fruit trees in general, spray 0.75%-1% ferrous sulfate before bud break, or spray 3 consecutive times with 0.5% ferrous sulfate plus 0.5% urea after yellow leaves appear. Ferrous sulfate can also be mixed with organic fertilizer at a ratio of 1:10-20 and applied under fruit trees, which can green up 70% of iron deficiency symptoms.
The high-pressure injection method is also an effective way to apply iron to fruit trees, that is, a 0.3%-0.5% ferrous sulfate solution is directly injected into the xylem of the trunk and then transported with the sap flow to the parts where it is needed.
When fruit trees show iron deficiency chlorosis, spraying iron fertilizer alone results in only spotty regreening of diseased leaves, while new leaves remain chlorotic, giving poor results. If urea and citric acid are added to the iron fertilizer solution, good results will be achieved.
The solution preparation method is: first add 25 grams of citric acid to 50 kg of water, and after it dissolves, add 125 grams of ferrous sulfate. After the ferrous sulfate dissolves, add 50 grams of urea, thus preparing a compound iron fertilizer of 0.25% ferrous sulfate plus 0.05% citric acid plus 0.1% urea.
The above is the introduction from Gengzhongbang Planting Network on the use of iron fertilizer. If you have better additions, please leave a comment below to tell us.