What are the high quality varieties of calcium fruit seeds? What are the methods of raising seedlings?

Calcium fruit, also known as European plum, is a new high-quality fruit variety unique to China, and it is called calcium fruit because it has a variety of calcium supplementation and high nutritional value. In addition to eating, calcium fruit also has ornamental value and processing value, so it is widely sought after by growers. At present, there are many varieties of European plum (calcium fruit) bred in China, among which 16 varieties have been identified and approved by relevant departments of the state, which strongly promotes the rapid development of calcium fruit planting industry in China. So what are the high quality seeds? What are the breeding methods? Let's get to know each other.

What are the high quality seeds?

1. Calcium Fruit No. 4

The fruit is oblate to round, red to dark red on the surface, red in flesh, crisp and sour in taste, with an average fruit weight of 6.0g. This variety matures from early September to early October in various regions. It is the main variety for processing and is used for juice making and wine brewing.

2. Calcium Fruit No. 5

The fruit is round with yellow pericarp and pale yellow flesh. The average fruit weight is 8.0-10.5g. The fruit is tender, juicy, mature in mid-August, high yield, processing varieties, can be used as pollination trees of variety 4.

3. Calcium fruit No. 6

The fruit is nearly round, the skin is dark red and bright, the flesh is yellow, and the fruit is sweet and concentrated. The fruit is big, the average fruit weight is 10.0-13.0g, ripens in early August, has the characteristics of strong growth, high sugar content, high yield and strong adaptability compared with other varieties, and is a fresh food and processed variety.

4. Calcium Fruit No. 7

Fruit oblate, orange background color, pale yellow flesh, beautiful appearance, rich flavor, sweet and sour taste. The average fruit weight is 11.0-14.3g. The fruit can be picked for 20 days. It has high yield and matures from late August to early September. It is a fresh food variety.

What are the breeding methods?

1. Sowing seedlings

Mature fruits are collected, seeds are prepared and dried, and stored in a cool and ventilated place. After stratification and other seed treatment operations are completed, seeds can be sown at the beginning of March when 15% of seeds have broken shells and exposed buds. hole sow, row spacing 40 cm, plant space 15 cm, 3 seeds per hole, soil covering 3-4 cm, and then covered with plastic film, that emergence rate can reach more than 85%.

2. Greenwood cuttings

Select superior individual trees in the first and middle of May, collect the cuttings with semi-lignification thickness of more than 0.4 cm in the current year, remove leaves immediately after harvest, leave only 1-2 leaflets at the upper part, and immediately insert them into clear water and put them in shade. When inserting, first use a stick slightly thicker than the cuttings, insert the cuttings, and then wrap them tightly. After planting, water should be poured thoroughly in time and sprayed on the leaves, spraying 3-5 times a day, spraying 0.2% carbendazim or thiophanate-methyl every 3 days to prevent diseases, so that roots can be rooted after 15-20 days.

3. Root burying seedling

It can be done after defoliation and before germination. Digging 0.5-1 cm thick roots in early winter, cutting into bundles of 50 roots 15-18 cm long, attaching variety labels, storing in sand, and burying roots from late February to early March of the following year. After burying, irrigate with water, then cover with plastic film, which can increase temperature and moisture, improve emergence rate and seedling rate.

4. Grafting seedlings

Calcium fruit growth slow branches fine, grafting more than one year of growth seedlings, in early spring using branch grafting method. For inferior varieties can also be used in spring branch grafting method to improve varieties.

In general, there are many varieties and seedling methods of calcium fruit. Before planting, we must recognize the varieties of selected seeds, and then select appropriate seedling methods based on various factors, which is conducive to improving yield and quality.

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