In the hot season of summer, summer is the season when seedlings grow most vigorously. At the same time, summer is also the most severe season with high temperature, windy weather, drought and flood, pests and diseases. The management of seedlings after planting is the key to the survival rate of seedlings and the yield and quality of seedlings. Under the conditions of high temperature, drought, and rain and humidity in summer, the growth and development of nursery stocks are poor, diseases and insect pests occur, and the quality and yield of seedlings are reduced. What should we pay attention to in the maintenance of nursery stocks in summer? Nanjing Creativity Landscape has summarized several points for how to do a good job in summer nursery stock management for friends.
I. Irrigation and drainage
1. Irrigation: Summer temperatures are high, water evaporates quickly, and soil is prone to water shortages. Seedlings are most vulnerable to drought at this time. Most of the seedlings are best fed with water for ten days in the summer with little rain and drought. The best time to do it is in the morning and evening. When watering, not only must the soil be irrigated, but also the tree and its wraps (such as the straw rope that holds the trunk) To wet it. For ginkgo, pine seedlings strong drought resistance, generally do not have irrigation, but for poplar, weeping willow, metasequoia and other seedling irrigation times can be increased.
2, drainage. Typhoon and other natural disasters are more frequent this season. When ponds gather water, they must be drained in time. If the poorly drained soil should pay attention to controlling the number of watering, it will not cause rot.
Second, tree support
In summer, the weather is unpredictable. For the newly transplanted T. sinensis roots, the root system has not yet recovered its ability to support earth-solids. It is easily toppled during strong winds (such as typhoon), which can affect the growth of roots. Therefore, the trees should be promptly prepared. Support work. The supporting material may be a bamboo pole or iron wire. However, when supporting the tree, the bark should be protected to prevent the bark from damaging the bark or even being embedded in the tree, affecting the survival of the upper tree.
Third, shade protection against sunburn
In summer, the temperature is high, the sun is bright, and the water evaporation of the tree is relatively large. For shading tree species, flowers and seedlings with too late sowing time, it is necessary to shade the seedlings. In the initial stage of growth, cooling measures should be adopted to reduce the adverse effects of high temperature and heat damage. Such as shade shelters, shaded nets can be used to protect the seedlings safely over the summer, to avoid sunburn hazards, in order to facilitate the growth and survival rate of seedlings.
Fourth, timely soil, weeding
Summer sunshine, plenty of rain, and the growing season of field weeds. Weeds can easily absorb nutrients from the soil and affect seedling growth. After each rainfall or irrigation, timely cultivating loose soil and weeding, spreading seedlings inconvenient to loosen soil, can remove the weeds between the seedlings, and then spread a layer of fine soil on the bed to prevent the roots from blowing. The cultivating loose soil should be gradually deepened, but do not hurt the seedlings and pressed seedlings. Do not touch the roots of the seedlings when loosening or weeding.
Fifth, the method of fertilization should be properly
Seedling growth needs to provide sufficient nutrients. In order to meet the vigorous growth needs of seedlings, the seedlings should be top-dressed in a timely manner, and top-dressing fertilizers should be the main fertilizer. As far as possible, the methods of furrow application and acupoint application are used to increase the utilization of fertilizer.
Fertilizer can not be too high concentration, can not be applied too much at one time. In the morning and evening, water or light water and fertilizer must not be used to spread fertilizer between seedlings. Application of fertilizer can be done after loose soil and weeding.
Sixth, and time seedlings, Dingmiao
The seedlings should be selected after rain or after irrigation. Seedlings that are too dense, poorly grown, poorly developed, injured and pest-infested, and those that affect the growth of most of the surrounding seedlings are to be excluded. For broadleaf trees that grow fast, they can be 1-2 times slower, and they are slow growing. Conifers, such as cypress, should not be set to seedlings prematurely, but can be seedlings after 2-3 times. After the seedlings, it is best to use the diluted manure water to improve the survival rate of seedlings.
Seven, summer scissors
For its better growth, no matter what seedlings need pruning shears, if seedlings at this time can't take timely pruning measures on seedlings, not only caused the nutrient consumption of seedlings, but also increased the workload of winter shear. Also affected the quality of seedlings.
Eight, pest control
The vigorous growth of seedlings in summer, coupled with the changing weather in the summer, and the occurrence of seedling pests and diseases. At this time, investigations should be strengthened to make predictions of pests and diseases and reasonable control measures should be taken.
1, seedling disease
Powdery mildew: In the crape myrtle, Euonymus japonicus and other seedlings occur more, can be used 50% carbendazim 300-400 times solution or 50% thiophanate 800 times liquid control, generally twice, interval 7-10 days spray Liquid once.
Others: For the transplanted shoots that are transplanted this spring, two to three sprays should be used to prevent drug spraying, mainly using carbendazim, thiophanate or baijinqing.
2, seedling pests
Underground pests: beetles, cockroaches, cockroaches, etc. can be sprayed with dimethoate, and can also be diluted with phoxim to prevent rooting or artificially capture.
Red spider: It often occurs in cypress trees and can be controlled by acaricidal drugs.
Aphids: mainly occurs in seedlings such as Pittosporum cunnium, Camellia oleifera, and Hongyeli, and insect infestations on bag moths and moths may occur on many seedlings and should be controlled during larval stages.
In short, the maintenance of nursery stocks in summer is very important and has a great impact on the growth of seedlings. If management and maintenance are improper, it will cause a lot of losses. The creative landscape hopes that the vast number of friends can flexibly apply them to the planting process and should always inspect them as soon as possible. Prevention reduces damage.
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