The latest course of Orchard Management techniques and methods for planting Rosa roxburghii

Fertilizer application

The amount of topdressing should be increased year by year in the second and third years, and 0.05-0.1 kg urea or 5 kg clear dung water topdressing should be used per plant in summer and autumn. After each season, the shoot leaves were shaped and sprayed with potassium dihydrogen phosphate or other high-efficiency compound fertilizer to promote the maturity of the shoot leaves. Starting from the outer edge of the planting hole, digging and expanding the hole year by year combined with the application of green manure, improve the soil, use the garden to maintain the garden, and ensure the normal growth of fruit trees.

15-20 days before flowering, 0.1-0.2 kg urea or 15-20 kg clear dung water was applied to each adult fruiting tree to ensure the normal growth and development of flower buds and leaf buds. After falling flowers, 0.5% urea was sprayed in time to supplement tree nutrients to promote the normal development of young fruits. From late June to early July, each plant was foliar sprayed with 0.5% potassium dihydrogen phosphate and 0.25 kg urea or 30 kg dung water was applied to the root soil of each plant. 0.5% urea solution was sprayed on the leaves according to the nutritional status of the tree, once every 7-10 days, 2-3 times in a row, to promote fruit expansion and improve yield and quality. Apply enough base fertilizer to improve the soil and lay the foundation for prolonging the full fruit period and high and stable yield in the coming year.

Disease

The main diseases and insect pests of Rosa roxburghii Tratt are pear heart borer and peach borer, rose tube aphid, rose whorl scale and powdery mildew, etc. The control of pear small, peach small and aphids can be controlled by 40% dimethoate emulsion 1500 times of dichlorvos and 2000 times of dichlorvos and 2000 times of Shuding. Spray 5-degree stone sulfur mixture on Rose powdery mildew scale in winter. Powdery mildew with 70% methyl topiramate wettable powder 800 / 1000 times solution, or spray 155 powder powder 1000 / 1500 times solution. For the prevention and control of diseases and insect pests of Rosa roxburghii roxburghii, attention should be paid to cutting off dead branches and fruits of diseases and insect pests, ploughing soil, spraying medicine and killing insects in autumn.

irrigation

Rosa roxburghii root distribution is shallow, drought resistance is weak, it is necessary to strengthen the construction of water conservancy facilities, water diversion irrigation or tree cover in the dry season to keep the soil moist.

Pruning

The buds of Rosa roxburghii Tratt have the characteristics of strong sprouting and branching, and the short branches and leaves of the crown are luxuriant, without obvious apical and vertical advantages. therefore, Rosa roxburghii roxburghii should not be forcibly shaped and pruned, but should grow naturally. When pruning, only disease and insect branches, withered branches and senescent branches should be cut off, senile branches should be promoted by retraction, and adult trees should begin to adjust the relationship between growth and fruit, so as to achieve stable and high yield of Rosa roxburghii.