Summer is a critical period for high growth and coarse growth of seedlings, and it is crucial to strengthen the summer management of the nursery.
Irrigate nursery areas on a regular basis for regular irrigation. The use of cutting seedlings should be done after the seedlings are cut and inserted. The first irrigation must be filled. After the nursery stocks are in place, the soil should be kept moist. After the topdressing, the seedlings should be filled with water for one time, which can not only reduce the fertilizer damage, but also allow the fertilizer to be absorbed by the seedlings as soon as possible. After the head of the seedlings is filled with water, it is beneficial to increase the diameter of the seedlings and extend the functional period of the green leaves. After entering the retreat, the nursery should focus on drought resistance and high-temperature work. The conditional nursery should be filled with “running water†and night irrigation should be performed daily to keep the seedbed moist and reduce the temperature. In the summer high temperature period, irrigation should be carried out in the evening or early morning, it is best to use sprinkler irrigation, no sprinkler irrigation conditions, can be furrow irrigation, avoid flooding irrigation, so as not to cause high temperature boiled seedlings.
Shading and sunshading are mainly management measures adopted for the seedlings of shade-tolerant tree species and weak-weak broad-leaved tree species. In particular, when the seedling soil excavated coverings are removed, the shade can be used to mitigate changes in environmental conditions. Shading measures should also be taken under high-temperature hot and dry conditions, and shade awnings and shade nets can be used. When young shoots of seedlings are lignified, they should be removed in time.
Generally, annual dressing seedlings for top-dressing need more nitrogen and phosphorus in the initial stage of growth, and require a large amount of nitrogen, phosphorus, potassium, and other elements in the fast growing period. In the later growth stage, potassium is dominant, and phosphorus is supplemented to promote the woodiness of young shoots of seedlings. Change. In summer, seedlings need more fertilizer and the number of dressings should be more. Different nursery soils, fertilization should also be different, such as the soil of lime or strong acid nursery, prone to phosphorus deficiency, fertilization should increase the proportion of phosphate fertilizer; nitrogen sufficient nursery, should increase the phosphorus, potassium fertilizer proportion. Different soil texture, fertilization method is also different, the general sand soil fertilization should be a small number of times, clay fertilizer should be a large number of times less. The general nursery should be topdressed with nitrogen fertilizer and compound fertilizer for 2~3 times from July to August.
After cultivating and weeding, we should timely cultivating loose soil and weeding after rainfall or irrigation. Spread seedlings inconvenient to loosen the soil, remove the weeds between the seedlings, and then spread a fine layer of soil on the surface of the beds to prevent the roots from getting windy. The cultivator loose soil should be deepened one by one, but it should not hurt the seedlings and press the seedlings. Before the application of herbicide should be tested to prevent the occurrence of phytotoxicity.
Most of the fast-growing broadleaf species such as Robinia pseudoacacia, Apricot apricot, Amorpha fruticosa, etc. may be 1 to 2 times in seedlings; most of the slow-growing coniferous species such as Pinus tabulaeformis, Pinus sylvestris var. Drought and diseases should not be set prematurely, and the seedlings can be re-established 2 to 3 times. The seedlings should be carried out after the rain or after the irrigation. After the seedlings, it is best to use the diluted manure water to ensure the survival of seedlings. The transplanting seedlings can be carried out in conjunction with the seedlings, preferably on a cloudy day. The seedlings should be poured once in a timely manner after transplanting to ensure survival.
In addition, timely prevention and control of seedling pests and diseases, especially in the summer, seedling pests and diseases occur frequently, early detection, early prevention and control, mainly to prevent. For the sprouting seedlings, the buds should be promptly wiped; for the seedlings grafted this spring, the buds on the rootstock should be promptly erased.
Irrigate nursery areas on a regular basis for regular irrigation. The use of cutting seedlings should be done after the seedlings are cut and inserted. The first irrigation must be filled. After the nursery stocks are in place, the soil should be kept moist. After the topdressing, the seedlings should be filled with water for one time, which can not only reduce the fertilizer damage, but also allow the fertilizer to be absorbed by the seedlings as soon as possible. After the head of the seedlings is filled with water, it is beneficial to increase the diameter of the seedlings and extend the functional period of the green leaves. After entering the retreat, the nursery should focus on drought resistance and high-temperature work. The conditional nursery should be filled with “running water†and night irrigation should be performed daily to keep the seedbed moist and reduce the temperature. In the summer high temperature period, irrigation should be carried out in the evening or early morning, it is best to use sprinkler irrigation, no sprinkler irrigation conditions, can be furrow irrigation, avoid flooding irrigation, so as not to cause high temperature boiled seedlings.
Shading and sunshading are mainly management measures adopted for the seedlings of shade-tolerant tree species and weak-weak broad-leaved tree species. In particular, when the seedling soil excavated coverings are removed, the shade can be used to mitigate changes in environmental conditions. Shading measures should also be taken under high-temperature hot and dry conditions, and shade awnings and shade nets can be used. When young shoots of seedlings are lignified, they should be removed in time.
Generally, annual dressing seedlings for top-dressing need more nitrogen and phosphorus in the initial stage of growth, and require a large amount of nitrogen, phosphorus, potassium, and other elements in the fast growing period. In the later growth stage, potassium is dominant, and phosphorus is supplemented to promote the woodiness of young shoots of seedlings. Change. In summer, seedlings need more fertilizer and the number of dressings should be more. Different nursery soils, fertilization should also be different, such as the soil of lime or strong acid nursery, prone to phosphorus deficiency, fertilization should increase the proportion of phosphate fertilizer; nitrogen sufficient nursery, should increase the phosphorus, potassium fertilizer proportion. Different soil texture, fertilization method is also different, the general sand soil fertilization should be a small number of times, clay fertilizer should be a large number of times less. The general nursery should be topdressed with nitrogen fertilizer and compound fertilizer for 2~3 times from July to August.
After cultivating and weeding, we should timely cultivating loose soil and weeding after rainfall or irrigation. Spread seedlings inconvenient to loosen the soil, remove the weeds between the seedlings, and then spread a fine layer of soil on the surface of the beds to prevent the roots from getting windy. The cultivator loose soil should be deepened one by one, but it should not hurt the seedlings and press the seedlings. Before the application of herbicide should be tested to prevent the occurrence of phytotoxicity.
Most of the fast-growing broadleaf species such as Robinia pseudoacacia, Apricot apricot, Amorpha fruticosa, etc. may be 1 to 2 times in seedlings; most of the slow-growing coniferous species such as Pinus tabulaeformis, Pinus sylvestris var. Drought and diseases should not be set prematurely, and the seedlings can be re-established 2 to 3 times. The seedlings should be carried out after the rain or after the irrigation. After the seedlings, it is best to use the diluted manure water to ensure the survival of seedlings. The transplanting seedlings can be carried out in conjunction with the seedlings, preferably on a cloudy day. The seedlings should be poured once in a timely manner after transplanting to ensure survival.
In addition, timely prevention and control of seedling pests and diseases, especially in the summer, seedling pests and diseases occur frequently, early detection, early prevention and control, mainly to prevent. For the sprouting seedlings, the buds should be promptly wiped; for the seedlings grafted this spring, the buds on the rootstock should be promptly erased.
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