Should pay attention to the effect of calcium on apple quality

Calcium has a greater effect on improving apple quality than nitrogen, phosphorus, potassium and magnesium. Apple calcium deficiency can cause many physiological disorders and cause pathological diseases. Calcium prevents apple rot and maintains fruit firmness and reduction. The release of ethylene is the most effective ion; the physiological diseases caused by calcium deficiency in apples mainly include bitter pox disease, acne spot disease, ruby ​​spot disease, browning of fruit flesh and water heart disease, etc., which usually occur during fruit storage.

The causes of calcium deficiency physiological disorders in apples are:

1. Drought. Because the distribution of calcium in fruit trees is closely related to transpiration, leaves and fruits can compete for transpiration, and drought inhibits the distribution of calcium to fruits.

2, nutritional imbalance, the content of nitrogen, potassium, calcium and magnesium nutrients in the tree, the proportion is out of balance, resulting in bitter pox disease.

3. The formation of calcium oxalate in fruit stems, the fruit stem contains more calcium oxalate precipitate, which hinders calcium from entering the fruit. The precipitation does not affect the input of calcium (six weeks after flowering). As the fruit expands, the crystal of calcium oxalate increases. Fill the vascular tissue and hinder the input of calcium later.

4, excessive accumulation of sorbitol, water heart disease.

5, the behavior of calcium during storage of apple: during the storage process, the calcium in the heart area moves to the outer layer.

Calcium supplementation measures should be taken:

1. Add organic fertilizer to maintain a moderate supply of soil moisture.

2. Apply calcium fertilizer to the soil, such as calcium, magnesium and phosphate fertilizers.

3. Spray calcium fertilizer or post-harvest fruit in the growing season. Spray 0.3-0.5% calcium chloride or 0.5-1.5% calcium nitrate or amino acid calcium 300 times before fruit picking. Spray a total of 3 times. The fruit is slightly diluted with 0.75-1% calcium nitrate or calcium chloride. The heavier orchard occurs all the year round. It can spray 70% calcium chloride 150 times liquid in the middle and late growth period, spray once every 20 days, spray a total of 2-3 times. When the temperature is high, calcium nitrate can be used to burn the leaves with calcium chloride. .
【Comment】 【Print this article】 【Close this page】 【Large, medium and small】

Sealing Film

Product Features
1. The product is easy to open and close, which can effectively seal deep well plates, sample tubes, etc., which is convenient for operation and saves time.
2. Good airtightness can prevent the volatilization of various solvents.
3. Tolerate a wide temperature range, suitable for various experiments.
4. Resistant to chemical corrosion and used for low-temperature storage.

5. The pre-opened silica gel lid allows the Pipette tip or probe to enter the hole without damaging the lid.

6. After the third party inspection, no RNA/DNA enzyme contamination
7. It can be used on automated machines, and the product size conforms to the SBS standard
8. It can be used with stickers, silica gel, and sealed without leakage. 96 round-hole silica gel and 8-hole silica gel strip with matching sealing plate
9. Good flatness, can be transported long distance after sealing with heat sealing film
10. The products are produced and packaged in a 100,000-class dust-free workshop, and the product quality is stable
11. Alphabetical sorting and cut corner marking make the storage and collection of samples more convenient and faster.
12. Each package has an independent article number and batch number identification, which is convenient for quality tracking and traceability


Film Seals,Sealing Film For PCR Plates,Sealing Film QPCR,96 Well Plate Sealing Film,Silicone Sealing Mat

Yong Yue Medical Technology(Kunshan) Co.,Ltd , https://www.yypipette.com