Trees with short defoliation in the north?

Trees like fertile land and warm areas. In northern China, deciduous trees with short defoliation period include Ginkgo biloba and Luan tree. (also known as lantern tree), Metasequoia glyptostroboides, triangle maple, red maple, camphor, magnolia grandiflora (magnolia grandiflora), smiling face, etc.

The following are some trees with shorter defoliation periods in northern China:

1. Magnolia is very gentlemanly. Its petals are similar to lotus flowers, with thick petals and elegant colors. Magnolia blooms first, then blooms. The flowering period is from February to March in early spring, and the duration is about 10- 15 days. Magnolia grandiflora can grow to 25 meters high and belongs to tall deciduous trees. Its tree shape is tall and straight, and its branches are even, which is suitable for planting on both sides of urban roads.

2. Koelreuteria paniculata is a common tree with upright trunk, round and full crown, flaming new leaves in spring, full branches of yellow flowers in summer, "lantern fruit" in autumn, and bare branches standing proudly in the snow in winter. Luan tree usually blooms from June to September every year, and the flowering period lasts for a long time. Koelreuteria paniculata will bear fruit after flowering. Generally, the leaves will fall completely in September and about 65438+ 10 days.

3. Platanus acerifolia is a deciduous tree with tawny pubescence on its twigs and petioles, and a thin yellowish layer in the white pulp on its branches. Leaf blade is broadly ovoid, ovoid, triangular ovoid or ovoid-elliptic, the tip is gradually pointed, the base is truncated or broadly wedge-shaped, rarely nearly heart-shaped, whole or with wavy teeth, both surfaces are sparsely pubescent or nearly hairless, and the leaves fall off completely around 10.

Ginkgo biloba is a deciduous tree with light gray bark, which splits deeply longitudinally when it is old. Leaves are spirally scattered on long branches and clustered on short branches. The blade is fan-shaped with 2 shallow cracks at the top. Dioecious; Usually, the long branches of male plants extend obliquely upward, and the long branches of female plants expand and sag more than those of male plants; The short branches are dense, the leaves are scarred and dark gray; The winter buds are yellowish brown, conical and obtuse, and the leaves fall off completely in about 7 days.

Deciduous trees refer to trees whose leaves fall off in autumn and winter or in dry season every year, generally referring to deciduous trees in temperate regions, such as hawthorn, pear, apple and phoenix tree.

Deciduous leaves are the result of short sunshine, which leads to the decrease of auxin and the increase of abscisic acid in plants, resulting in delamination. This is an adaptation of plants to reduce transpiration and spend cold or dry seasons. This habit is formed in the long-term evolution of plants.