The price of agricultural products fall while zinc sulfate price keep stable
A happy Spring Festival had past. According to the monitor of national agricultural and sideline products and agricultural materials market, Rech Chemical Co, Ltd tells you most of the national vegetable prices fall than those of 24th; the price of eggs, meat, aquatic products fall too; and Fruit, edible oil prices have bit floated; Milk products, processed grain price keep stable.
According to the information collected by Rech Chemical Co, Ltd, since October 2nd, the testing data showed that the present average price of vegetables has been in a falling state but still bit higher than the same period of last year. The national average prices of 21 kinds of vegetables are higher 10% than last year.
Because of the Spring Festival, not all the zinc sulfate factories have begin their manufacturing. The market demand is still bigger that may raise the price of zinc sulfate. In order to guarantee the customers’ profit, the price of zinc sulfate, ferrous sulfate, magnesium sulfate, manganese sulfate supplied by Rech Chemical Co. Ltd are basically stable without much changes recently.
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Nutrient deficiency of chrysanthemum
When applying fertilizers for chrysanthemum, we should take element’s antagonism into consideration. As we all know, too much content of either single element will reduce other elements’ absorption such as manganese sulfate and zinc sulfate. Thus, keep element’s balance is very important to prevent plant from nutrient deficiency.
Signs of Mg deficiency include yellowish vein, poorly developed root system, small leaves and flowers and malformed flowers. Insufficient Mg content or excessive K in soil reduces plant’s absorption to Mg ions. Mg deficient plant can be corrected by spraying 0.2% magnesium sulfate solutions on leaves.
Fe deficient plant show yellowish leaves except the veins. Plant and root grow slowly, and the new leaves will be yellowish white in severe case. This condition can be found in soils of pH >6.5, too much heavy metal will also cause Fe deficiency. A common way to remedy this condition is to spray 0.2% ferrous sulfate solutions on leaves.
Symptoms of Zn deficient leaves involved small new leaves, inhibited growth, curled leaves and brown spots. The new buds are withered in severe case. This condition can be corrected by spraying 0.3% zinc sulfate solutions or applying zinc sulfate directly.
Generally, symptoms of Mn deficiency appear on middle leaves with chlorosis and then extend to the marginal areas. Most of the leaves are yellow except the main veins. This condition is easy to be found in alkalinity soil. This condition can be corrected by spraying 0.1%-0.2% manganese sulfate solutions on leaves.
magnesium sulfate heptahydrate
manganese sulfate monohydrate in powder and granular