Primary maintenance refers to the survival rate after maintenance period 100%, and secondary maintenance refers to the survival rate after maintenance period of 90%.

According to the importance of landscaping sites and the types of plants, in-vitro nutrients are divided into three grades: primary in-vitro culture, secondary in-vitro culture and tertiary in-vitro culture:

1. The management of landscaping (including lawns, shrubs, trees, pools, garden roads and facilities), plastic plants and ancient and famous trees of important tourist attractions is divided into first-level management;

2. Landscaping management in remote places (including lawns, shrubs, trees, garden roads and facilities) is classified as three-level management;

3. In addition to primary custody and tertiary custody, it is also divided into secondary custody.

Extended data:

First, the level of maintenance quality standards

1, sufficient greening, reasonable plant configuration, loess is not open.

2, garden plants to do:

(1) Growth potential: good. The growth amount exceeds the average growth amount of this tree species (the average growth amount is to be determined after investigation).

(2) Strong leaves:

① The color of the leaves is normal, and the leaves are large and thick. Under normal circumstances, the leaves are not yellow, scorched, rolled or defoliated, and there are no insects, urine, insects and net dust on the leaves;

② The heaviest leaf bite is below 5% per plant (including 5%, the same below).

(3) Strong branches:

① There are no obvious dead branches, strong branches and lignified new branches before winter;

(2) live eggs and worms without stem borers;

(3) The most serious main branch of scale insects has live insects 1 each below 100 square centimeter (including 1 each, the same below), and the smaller branch has less than 5 live insects per foot (including 5, the same below); The number of plants is below 2% (including 2%, the same below);

(4) The crown is complete: the branch points are appropriate, the distribution of main and lateral branches is balanced and the number is appropriate, the inner room is not chaotic and ventilated.

(4) Good measures: seriously carry out maintenance according to the requirements of first-class technical measures.

(5) There are few trees on the street.

(6) The lawn coverage rate should basically reach100%; Lawn weeds should be controlled within 10%; Lush growth, normal color, no yellowing; Prune more than 6 times a year in warm land type and more than 15 times a year in cold land type; No pests and diseases.

3. There are no dead trees in street trees and green spaces, and the trees are trimmed reasonably and beautifully, which can solve the contradiction between trees and wires, buildings and transportation in time.

4. Greening produces garbage (such as branches, leaves, grass foam, etc. ) key areas can be cleared with the production, and other areas and road sections can be cleared daily; Green space should be clean, free of bricks, bricks, baskets, plastic bags and other wastes, and kept clean regularly.

5 railings, garden roads, tables and chairs, manhole covers, decorations and other garden facilities are complete, and timely maintenance and oil decoration are required.

6. There is no obvious man-made damage, and there is no stacking, scaffolding and occupation of green space and lawn. There are no nails and bolts on the trunk of street trees, and there are no phenomena (if any, within 2 meters) that affect the maintenance, management and growth of trees, such as stacking materials, scaffolding and stalls, fences, etc. Protective measures should be taken under trees within 2 meters from the trunk.

Second, the secondary maintenance quality standards

1, the greening is relatively sufficient, the plant configuration is basically reasonable, and the loess is basically closed in the open air.

2, garden plants to do:

(1) Growth potential: normal. The growth amount reaches the average growth amount of the tree species of this specification.

(2) The leaves are normal:

① Leaf color, size and thickness are normal;

(2) The number of plants with serious yellow leaves, burnt leaves, rolled leaves and insect urine nets is below 2%;

③ The most seriously damaged leaves are below 0/0% per plant/kloc.

(3) Whether the branches and trunks are normal:

(1) There is no obvious dead branch, and the dead branch is correct;

② The number of stem borers is below 2% (including 2%, the same below);

③ The most serious part of scale insects is the trunk of 100 square centimeter, with less than 2 live insects, less than 10 live insects in a foot-long branch, and the number of plants is below 4%;

④ The crown is basically complete: the main lateral branches are evenly distributed, and the crown is ventilated and transparent.

(4) Measures: Carry out maintenance according to the requirements of secondary technical measures.

(5) The number of street trees is less than l%.

(6) The lawn coverage rate is over 95%; Lawn weeds should be controlled within 20%; Normal growth and color, no yellowing; Trim the warm type more than 2 times a year, and the cold type 10 times or more; There are basically no pests and diseases.

3. There are no dead trees in street trees and green spaces, and the trees are trimmed reasonably and beautifully, which can better solve the contradiction between trees and wires, buildings and traffic.

4, the green production of garbage to Nissan Nissin, there is no obvious garbage in the green space, can insist on surprise cleaning before major festivals.

5 railings, garden roads, tables and chairs, manhole covers, decorations and other garden facilities are basically complete, and they are basically maintained and decorated in time.

6, no major man-made damage. For slight or occasional uncontrollable man-made damage, it can be found and handled in time, and there is no piling, scaffolding and occupation of green space and lawn; There are no obvious nails and bolts on the trunk of street trees, and there are no piles, scaffolding and fences. Within 2 meters from the trees, the maintenance and management of trees are affected.

Baidu Encyclopedia-Green Maintenance Grade Quality Standard