The cause of calcium deficiency in vegetables and its solution
Calcium is one of the major constituents of plant cell walls and cell membranes and plays an important role in maintaining the structure and function of cell membranes. In general, the dicotyledonous plant needs more calcium than the monocotyledonous plant, while the tomatoes, cucumbers and other melons and fruits and vegetables are mostly dicotyledonous plants, their demand for calcium nutrition level is several times higher than that of cereals. Dozens of times. So, what are the symptoms, causes, and solutions to common calcium deficiency in vegetables?
Common symptoms of calcium deficiency in several vegetables
Navel rot occurs in tomatoes and peppers with calcium deficiency. The flesh of the young fruit at the early stage (the end of the petal shedding) is immersed in water, and the peel is intact. As the fruit enlarges, the front part of the fruit shrinks and shrinks and darkens and browns. Frequent secondary mold infections, rotten topography. The U.S. rot of the sweet pepper lacked calcium, and there was no obvious tomato apical depression, which was mostly brown withered. Umbilical rot usually occurs when the fruit is close to the size of the thumb, and the fruits of the enlarged period generally do not recur.
Cabbage calcium deficiency prone to heart disease, calcium deficiency in cabbage will cause heart rot. The disease manifests itself as follows: Chinese cabbage and cabbage are cut off after the ball is encrusted and the edge of the inner leaf is seen or browned together with the heart and leaves; sometimes, the edge of the unbeaten leaves of the ball is shrunken and browned at the beginning of the ball. Calcium-deficient cabbage and Chinese cabbage have a significant decline in edible rates, and they have an abnormal taste and severely affect quality.
The lack of calcium in celery showed that the growth of the apex was obstructed, the new leaves were yellowing, the leaf margin was scorch, and the plants had no fresh sensation. Rooting observed showed less roots, yellowish brown, root branches, and few root hairs.
Common causes of calcium deficiency
1 The soil itself lacks calcium; 2 the soil has high salt content, which inhibits the absorption of water and nutrients by the roots; 3 the soil drought increases the concentration of soil solution and reduces the amount of water absorption in the roots, thus inhibiting the absorption of calcium; 4 excessive application of ammonium nitrogen It will inhibit the absorption of calcium, and the incidence of cabbage heart disease will increase with the increase of nitrogen application. 5 Calcium is difficult to absorb by itself and does not transfer in the crop after absorption.
solution
1 Control the amount of fertilizer, it is not appropriate to use too much fertilizer once, especially with chlorinated fertilizers, such as ammonium chloride and potassium chloride, and less use of ammonium nitrogen; 2 timely irrigation, ensure soil moisture, prevent soil drought; apply more organic calcium Fertilizers that are easily absorbed by the whole nutrient, promote the growth of roots and the ability to attract fertilizers, such as high-calcium, high-potassium fertilizers such as "Feifei" and "Flower and Fruit Paradise" containing polymer sugar; 3 Leaf calcium supplementation. Such as foliar spray calcium nitrate aqueous solution, amino acid chelate calcium, but the conventional method of calcium absorption and utilization is low, and not easy to move in the crop body. The current market performance is better sugar alcohol chelated calcium products, such as calcium paraquat, such products, high activity, easy to absorb, can move, can be transmitted from the plant phloem to new tissue.
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Accuracy
+/-8cm@ 0.1~3.5m
Measuring Unit
cm
Measuring Range (without Reflection)
0.1-12m
Measuring Time
0.1~3 seconds
Measuring Frequency
100 Hz
Laser Class
Class II
Laser Type
650nm, <1mw, red
Weight
About 5g
Voltage
DC2.5V~+3.5V
Serial Level
TTL 3.3V
Size
46*17*7mm
Operating Temperature
0-40 ℃ (32-104 ℉ )
Storage Temperature
-25~60 ℃ (-13~140 ℉)
IT02S Mini Tof Sensor Module Diagram
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