The seed collection of ornamental maple trees shall be carried out in accordance with the technical regulations for seed collection of main tree species. Soak the seeds in warm water at 40℃ for 24 h before seedling raising, then mix the seeds with twice the wet river sand and put them in the seed storage pit (or pit).

Take out the seeds half a month before sowing, spread them in the leeward and sunny places, accelerate germination in the open air, and sow about 1/3 when the seeds begin to crack. Nursery site selection, soil preparation, fertilization, operation mode, seeding and seedling raising shall be carried out in accordance with the Technical Regulations for Tree Seedling Raising DB 21/T1291-2004.

Nutritional components: clear water infusion is the main method, while plant hormones and mineral elements can be added. Generally, rooting powder 0. 1 g L- 1 and potassium dihydrogen phosphate 0.5 g L- 1 can be added, and trunk injection vitality can also be added.

Extended data:

morphological character

Trees or shrubs, deciduous and evergreen. There are many scales arranged in imbricate shape in winter buds, and only 2 or 4 opposite scales are sparse or bare. Leaves opposite, petiolate, sessile, simple, sparsely pinnate or palmately compound, undivided or palmately divided. Inflorescence corymbose, spicate or cymose, born in several terminal buds or lateral buds of leafy branches.

There are often leaves in the lower part of inflorescence, which are sparse and leafless. The leaves grow before or at the same time, and are sparse after flowering. The flowers are small, green or yellowish green, sparse purple or red, neat, bisexual, heterozygous or unisexual, and the male flowers are the same plant or different plants; Sepals 5 or 4, imbricate; Petals 5 or 4, sparsely undeveloped; Disk ring-shaped or mattress-shaped or cracked, sparse and underdeveloped.

Born inside or outside stamens; Stamens 4- 12, usually 8; The ovary is superior, 2-loculed, the style is only 2-lobed at the base, most of them are sparse, and the stigma is often reversed; Ovary has 2 ovules per locule, and only/kloc-0 ovules per locule develop, erect or inverted. Fruit nuts often have wings, also known as samara; The seed has no endosperm, thin exocarp, membranous, inverted embryo, flat cotyledons, folded or rolled.

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