How to correct calcium in apple tree
2020-03-07 02:06:37
Bagging is an important technical measure for the production of pollution-free green fruits, but after bagging, apples are more prone to physiological diseases such as bitter pit disease, spot disease and water heart disease caused by calcium deficiency, and can also cause cracks and roughness on the surface of fruits. The success of bagging is closely related to the selection of Calcium Supplements and calcium supplementation measures.
Calcium should select the critical period and site. There are two peak periods for calcium absorption in fruits, one is less than 50 days after flowering, and the absorption is more than 80%; the other is 30 to 40 days before harvest, so calcium must be added during this period. In addition calcium should be sprayed on the fruit as much as possible.
First of all, we must pay attention to calcium supplementation methods. The specific methods are as follows:
Fruit calcium absorption during the key period of calcium supplement 4 to 5 weeks after flowering (in the month before bagging) is a key period for calcium supplementation of fruits. In combination with spraying, calcium fertilizer can be sprayed for 2 to 3 times a year to quickly supplement calcium, such as CA2000. Calcium Po or Cikang calcium Po, each interval of 10 days; In addition, spray calcium fertilizer 4 to 8 weeks before mining and post-harvest calcium-containing solution dip fruit, such as with CA2000 apple color preservatives or calcium chloride before harvest Spraying, post-harvest dipping, etc., can prevent the occurrence of calcium deficiency symptoms in fruits.
Promote the application of organic fertilizer, mixed with calcium superphosphate, calcium magnesium phosphate phosphate fertilizer or calcium phosphate calcium through ion exchange and water transport into the xylem, in recent years, a large number of inorganic fertilizer, resulting in soil compaction, root absorption of free calcium decreased . To implement grass orchards in the orchard to increase the content of organic matter in the soil is conducive to the absorption and utilization of calcium.
Advocate nutritional diagnosis of balanced fertilization, appropriate control of nitrogen and potassium fertilizers to ensure that the dynamic balance of nitrogen, potassium and magnesium and other elements between the foliage spraying CA2000 fruit ammonia treasure to add trace elements, promote calcium absorption.
The use of high-content, high-activity, fast-absorbing high-quality calcium fertilizer such as CA2000 calcined by the Research Institute of Fruit Research in Shaanxi Province, has a large dilution (600 to 800 times), high activity calcium content, and high absorption efficiency of 95%. the above. After researching Fuji apple apple spraying CA2000 calcium treasure, due to the significant increase in calcium absorption in the skin and pulp, basically controlled the occurrence of bitter pit disease and pox spot disease, the cracking fruit decreased from 13.5% of the control to 1.2%, the incidence of sunburn was from 7.8% dropped to 1.4%.
Bagging orchards to minimize ringing
Secondly, to select superior calcium supplement preparations, high-quality calcium supplement preparations should have two characteristics: one is that the calcium ion concentration should be high, and the requirement is more than 10%; the other is that the calcium activity should be high, the absorption rate should be high, and the requirement is 80. %the above. In general, the raw materials calcium chloride and calcium nitrate have the characteristics of high calcium content, but the absorption efficiency is low; the amino acid calcium has the characteristics of high absorption efficiency, but the calcium ion content is low, about 5%; some fully processed calcium The preparations have high calcium content and high absorption rate. For example, the CA2000 calcium treasure content is 18%, the Cikang calcium treasure content is 16%, and the Merrill Lynch effective calcium calcium content is more than 12%. The absorption rate is above 90%.
Calcium should select the critical period and site. There are two peak periods for calcium absorption in fruits, one is less than 50 days after flowering, and the absorption is more than 80%; the other is 30 to 40 days before harvest, so calcium must be added during this period. In addition calcium should be sprayed on the fruit as much as possible.
First of all, we must pay attention to calcium supplementation methods. The specific methods are as follows:
Fruit calcium absorption during the key period of calcium supplement 4 to 5 weeks after flowering (in the month before bagging) is a key period for calcium supplementation of fruits. In combination with spraying, calcium fertilizer can be sprayed for 2 to 3 times a year to quickly supplement calcium, such as CA2000. Calcium Po or Cikang calcium Po, each interval of 10 days; In addition, spray calcium fertilizer 4 to 8 weeks before mining and post-harvest calcium-containing solution dip fruit, such as with CA2000 apple color preservatives or calcium chloride before harvest Spraying, post-harvest dipping, etc., can prevent the occurrence of calcium deficiency symptoms in fruits.
Promote the application of organic fertilizer, mixed with calcium superphosphate, calcium magnesium phosphate phosphate fertilizer or calcium phosphate calcium through ion exchange and water transport into the xylem, in recent years, a large number of inorganic fertilizer, resulting in soil compaction, root absorption of free calcium decreased . To implement grass orchards in the orchard to increase the content of organic matter in the soil is conducive to the absorption and utilization of calcium.
Advocate nutritional diagnosis of balanced fertilization, appropriate control of nitrogen and potassium fertilizers to ensure that the dynamic balance of nitrogen, potassium and magnesium and other elements between the foliage spraying CA2000 fruit ammonia treasure to add trace elements, promote calcium absorption.
The use of high-content, high-activity, fast-absorbing high-quality calcium fertilizer such as CA2000 calcined by the Research Institute of Fruit Research in Shaanxi Province, has a large dilution (600 to 800 times), high activity calcium content, and high absorption efficiency of 95%. the above. After researching Fuji apple apple spraying CA2000 calcium treasure, due to the significant increase in calcium absorption in the skin and pulp, basically controlled the occurrence of bitter pit disease and pox spot disease, the cracking fruit decreased from 13.5% of the control to 1.2%, the incidence of sunburn was from 7.8% dropped to 1.4%.
Bagging orchards to minimize ringing
Secondly, to select superior calcium supplement preparations, high-quality calcium supplement preparations should have two characteristics: one is that the calcium ion concentration should be high, and the requirement is more than 10%; the other is that the calcium activity should be high, the absorption rate should be high, and the requirement is 80. %the above. In general, the raw materials calcium chloride and calcium nitrate have the characteristics of high calcium content, but the absorption efficiency is low; the amino acid calcium has the characteristics of high absorption efficiency, but the calcium ion content is low, about 5%; some fully processed calcium The preparations have high calcium content and high absorption rate. For example, the CA2000 calcium treasure content is 18%, the Cikang calcium treasure content is 16%, and the Merrill Lynch effective calcium calcium content is more than 12%. The absorption rate is above 90%.
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