What are the methods for selecting seeds and growing seedlings of sugar apple?

Many people have asked what kind of fruit the sugar apple is and what it tastes like. The editor thinks it varies from person to person. Some people like to eat it and are used to eating it, so they think it is very delicious, with a fresh, sweet taste. Some people do not like to eat it, so they think it has no taste. Below, let us learn about the seedling raising methods for sugar apple.

1. How to select sugar apple seeds?

1. Atemoya

Also called Australian custard apple. The fruit is larger than ordinary sugar apple, the fruit shape resembles cherimoya, the fruit surface is slightly smooth, and the skin can be peeled off in whole pieces. The flesh tissue is firm, and the sugar content is slightly lower than that of sugar apple. The seeds are larger and fewer, black.

2. Common sugar apple

The fruit is an aggregate fruit, a heart-shaped conical or spherical fleshy berry, with obvious tumor-like protrusions formed by the surface of the carpels. The surface is smooth, spindle-shaped or long elliptical, long ovate. The fruit is plump.

3. Bullock's heart

The fruit is formed by many mature carpels united into a fleshy aggregate berry, spherical, smooth and hairless, with a net-like pattern, dark yellow when ripe, and the seeds are long ovate. The flowering period is from late winter to early spring, and the fruiting period is from March to June of the following year.

2. Sugar apple seedling raising methods

1. Sowing

The use of seedling raising from seed in production is limited to common sugar apple; hybrid sugar apple cannot be used as a mother tree. The source of seeds for seedling raising from seed is very important. Seeds should come from large and well-shaped fruits on high-yielding, high-quality mother plants of superior varieties (common sugar apple). It is best to use fruits set by artificial pollination of the same variety. Wait until the fruit is fully mature, when the fruit is light greenish yellow and the suture lines between the small fruits are obvious, then harvest and collect the seeds. For cultivation as grafting rootstock, the requirements for seed collection can be lowered. After the seeds are taken out, wash them, remove empty grains and small seeds, and dry them in the shade before sowing. If the sugar apple seeds have been stored, they should be sun-dried before sowing to promote germination. Before sowing, the seeds can be soaked in 200 ppm gibberellin for 24-36 hours to promote earlier germination. The seedbed should preferably be fertile sandy loam, and decomposed organic fertilizer should be applied and mixed evenly. Dig ditches and make beds; the bed width should be based on convenience for field operations. Drilling or broadcasting can both be used, with a sowing rate of 7-8 kg per mu. After sowing, cover with fine sand or fine soil, press slightly, water thoroughly, and then cover with grass or plastic agricultural film to retain moisture. After seedlings emerge, uncover the grass or plastic agricultural film to avoid bending the seedlings. During the seedling stage, pay attention to water and fertilizer management. Generally water once every 3-4 days, and water once a day during drought. After 6-8 leaves, topdressing can begin to help cultivate strong seedlings.

2. Grafting

For grafted seedling raising of sugar apple, common sugar apple is generally selected as the rootstock. Such rootstock has the characteristics of good compatibility, dwarfed tree shape, and earlier production period. Grafting can generally be carried out only when the rootstock thickness reaches about 0.8 cm. Grafting time: whip grafting is generally in spring, while budding is better in summer and autumn; grafting in winter generally cannot survive. For the scion of sugar apple, select outer branch tips from vigorous, pest-free mother trees of superior varieties. After the scion is cut, remove the leaves and keep 0.3-0.5 cm long petioles to reduce water evaporation. This method is suitable for use during the growing season when sap is flowing, so that the bark of the rootstock can be peeled.

In summary, sugar apple is also called custard apple. If you want to try growing sugar apple, while learning the cultivation techniques well, you should also consider whether the local ecological environment is suitable for the growth and development of sugar apple.

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