Shape of High Yield Plant in Jujube Close Planting Garden of Arid Hillside Field

Lu Guibin(Shanxi Forestry Research Institute, Taiyuan 030012, P. R. China)

Arid hillside close planting garden; Jujube; Suitable plant shapes

The plant shape varies entirely with the planting density. After density planting in arid hillside jujube garden, the space between plant was limited, cultivation of the plant shape must follow the principle of decreasing polarity and reducing the size of crown, few amount of backbone branches and more fruiting locations, developing shape quickly and yielding early and high. Study showed that the plant shapes adapted to arid hillside jujube garden are mainly improved open-center type, and improved natural semi-spherical-type with multiple major branches. Open-center type had characteristics of quick deve- loping and weak trunk-growing, after opening center, properly regulating the amount of major branches and large fruiting branches can adapt to each kind of density garden; the improved natural semi-spherical type with multiple branches had few major branches, the trunk grew weakly. When the plant shape developed, the head of trunk was cut, polar growth of the plant was weak, which effectively controlled high growth of the crown. The shape was the same as the improved open-center type in the function of body’s building controlling, however, because it had relative more major branches and the crown was difficult of controlling, it only adapted to low density close planting garden, such as 6.0 m×2.0 m and 6.0 m×3.0 m garden.