The mother tree for seed harvesting should be selected fast-growing, early fruiting, high yield, while the fruit should be selected from the lower part of the trunk, the fruit is large, the outer flesh spines thick and sparse, the package of flesh is fat and fully ripe almost ask for the fruit to be placed for a few days, so that the fruit is softened, and then break open to take out the seeds, washed with water and dried in the shade. Seeds are not resistant to storage, the vitality can only be maintained for about twenty days, should be picked up with the sowing.

Seeding rate of 15-25%, 80-120 seeds per kilogram, germination rate of 95%.

The vertical distribution of Polyscias is generally below 300 meters above sea level. It needs high temperature, humidity, and frost-free climate, and is suitable for areas where the annual average air temperature is above 22-24℃, the average temperature of the coldest month is not lower than 12℃, the absolute low temperature is not lower than 0℃, the cumulative temperature is above 7500℃, and the annual rainfall is 1200-1800mm.

Saplings and young trees are sensitive to low temperatures, when the radiation-type low temperature occurs 0 ℃, the terminal buds, leaves, cold damage, down to -2 ℃ when the blight. Advection-type low temperature occurs when the average daily temperature of 9 ℃, the adult tree occurs serious frost damage. For example, from the winter of 1976 to the spring of 1977, the production area appeared more than fifty days of rainy low temperature (8.9 ℃) weather, many plants freeze to death.

Drought resistance is moderate, long drought often drop fruit, too much rain during flowering, also affects pollination. The soil requirements are not demanding, in the acidic to slightly acidic clay loam, sandy loam or gravelly soil, can grow and develop normally, but to deep fertile and moist sandy loam is the best. Sessions of strong positive species, the most light-loving, but seedlings, young trees slightly shade-tolerant, large trees need sufficient sunlight to normal results. Avoid low-lying water.

Main Values

Eating

Polo nectar is a fruit, woody food and valuable timber both tropical tree species, fast-growing, beautiful, high fruit production. The fruit is very large, large 15-20 kilograms, generally weighing 7.5-10 kilograms, known as the king of the fruit. Mature fruit flesh is rich in sugar and vitamin C, etc., for the superior fruit, sweet flavor and aroma, but also can make drinks, or the production of fruit under, canned and brewing chips.

The seed kernel accounts for 15-30% of the weight of the whole fruit, high starch content, fried or boiled food, taste like chestnut.

Economy

The wood is yellow, fine grain, less cracking after drying, not deformed, easy to process, can be used as top quality furniture, interior construction, spinning products and musical instruments. The sawdust of the heartwood can be extracted yellow dye, used to dye clothes. In addition, the pineapple tree crown is beautiful, suitable for street trees and garden greening species.

Ecology

Medium resistance to sulfur dioxide, can be used as urban or industrial and mining areas to purify the air of green trees.

Medicinal use

Fruit: Borneol is used as medicine with its fruit and seed kernel. The fruit is sweet, slightly acidic and flat. It generates fluids and removes vexation, relieves alcohol and awakens the spleen. Used for alcoholism.

Kernel: The seed kernel is sweet, slightly acidic and flat. Benefiting qi and promoting lactation. Used for postpartum spleen deficiency and qi weakness, low milk or milk failure. It can stimulate the proliferation of monocytes and purified T-cells in unseparated peripheral blood, and can also induce the production of IgE, and can increase the IgE response.

Baidu Encyclopedia - Pineapple Nectar