The young tree period of "Wogan" refers to the period from planting to first fruiting, which is generally 1 ~ 3 years. This period is characterized by vigorous growth of canopy and root system, rapid expansion of absorption and photosynthesis area, formation of canopy skeleton and accumulation of nutrients in the later stage.

The cultivation task of young trees is mainly to strengthen tree nutrition, prune reasonably, cultivate strong crown skeleton and good root system, and cultivate auxiliary branches. You can try a small amount of fruit.

Management of the first fruit tree in Wogan;

The period from the first fruit to a large number of fruits is called the first fruit period. This period is characterized by gradually increasing fruit yield, accelerating the growth of crown and root system, and increasing the number of flower buds. It is the transition period from growth to fruiting, and the transformation from vegetative growth advantage to reproductive growth advantage.

Results The preliminary cultivation measures were: on the one hand, to ensure the robust growth of trees, and at the same time, to take appropriate measures to alleviate the tree potential. Specifically, it is necessary to continue shaping and moderate pruning, depending on the fertilization of trees. Overgrown trees should be controlled by nitrogen fertilizer and water control. Promote bud differentiation and prepare for high yield.

Key points of management of "Wogan" in full fruit period;

The period from the beginning of a large number of fruits to the beginning of a decline in output is called the full fruit period. Its characteristics are that the centrifugal growth of crown and root system stops, the crown reaches the maximum, there are many fruiting branches, the fruiting load is large, aging and renewal may begin, and the crown is partially empty.

The purpose of cultivation in full fruit period is to control super-high yield, prolong full fruit period and overcome the fruits in different years. The concrete measures are to improve the soil, keep the soil organic matter content at about 2%, fully supply fertilizer and water, finely prune and control pests and diseases.

Management characteristics of trees in the late fruiting stage of "Wogan";

The late fruiting stage is the period when citrus production begins to decline and loses its fruiting ability. It is characterized by a large number of branches and roots dying, and the main branches begin to age, resulting in few fruits and poor adaptability to the environment.

Results The main cultivation measures in the later stage were rejuvenation and high yield. It is necessary to deepen soil improvement, strengthen fertilizer and water management, renew root system and crown, re-cut and shrink backbone branches, prevent and control pests and diseases, and sparse flowers and fruits in new year.

Management of three developmental stages of wogan fruit;

The period from the beginning of fruit ovary expansion after flowering to fruit maturity is called fruit growth and development period. Fruit growth usually presents "S" or "double S" curve. According to the changes of cells, the fruit development process can be divided into cell division stage, cell expansion stage, cell expansion stage and maturity stage.

(1) cell division, which is actually an increase in the number of nuclei. Mainly due to the repeated division of cells in pericarp and gizzard, the growth of fruiting body needs cytokinin gibberellin and valence elements in this period;

(2) During the fruit expansion period, after the first physiological fruit drop, cell division basically stopped and the fruit turned to cell expansion. By the first half of June, the physiological fruit drop was over. From late July to early August, the fruit entered the second expansion peak. With the rapid increase of the sand sac, the fruit was basically shaped and the weight increased after entering the third expansion peak. This period needs auxin and calcium.

(3) At the fruit maturity stage, the tissue development of the fruit is basically perfect, the solids such as sugar, amino acids and protein increase rapidly, and the acid content decreases. Chlorophyll in pericarp gradually decomposed, carotene synthesis increased, and pericarp gradually colored. Fruit juice increases, pulp and fruit juice have color; The seed hardens and the fruit matures. Phosphorus and potassium are needed in this period.

Extended data:

Wogan is a late-maturing hybrid orange variety, which is a hybrid of "Si" orange and "Danxi" red orange. Citrus, red orange, Fructus Aurantii and Fructus Aurantii can be used as rootstocks in production, but there is graft incompatibility with Fructus Aurantii, which should be avoided.

This variety is a late-maturing hybrid orange variety. Strong growth potential, the crown of the tree is naturally round at first, and gradually opens after the fruit. There are short thorns on the branches.

Leaves:

The leaves are dense, dark green, broadly lanceolate, pointed and tapered, with wedge-shaped base, entire leaf margin and linear wings. The leaf is about 8.4 cm long and 3.5 cm wide, with a leaf shape index of 2.4.

Flowers:

The flower is small, with five white petals, the petals are 1.02 cm long and 0.45 cm wide, the style is tall and upright, the stamens 17 ~ 20, the anthers are light yellow and the pollen vitality is high.

Fruit:

The fruit is of medium size and weighs about1.30g.. The fruit is oblate with a transverse diameter of 6.7 cm and a longitudinal diameter of 5.7 cm. The fruit shape index is 0.85. The peel is smooth, orange-yellow or orange-red, the oil cells are fine, slightly convex or flat with the fruit surface, and there are few pits. The top of the fruit is flat,

There is no obvious printing ring, and the radiation groove in the column area is not obvious. The peel is tightly wrapped, with a thickness of 0.36 cm, which is easy to peel off. The sponge layer is yellow and white, with petals 9 ~ 1 1, stele size 1.25 cm× 1.05 cm, orange-red pulp, small and short juice cells, thin capsule wall, tender pulp residue and sweet juice. The number of seeds is 9 ~ 20, and the seeds are rod-shaped and single embryo.

This variety usually blooms in Beibei, Chongqing in mid-April, turns color in mid-to-late 165438+ 10, and matures in mid-October. The harvest period is 65438+1mid-October to early March. Fruit has good storability, and the natural fruit preservation time can be from February to July-August when it is ripe1-.

References:

Baidu Encyclopedia-Wogan (Shen Yu Citrus 20 12002)