Hold on to the autumn tube in the nursery at eight o'clock

First, appropriate amount of fertilizer. There are usually two ways to top fertilizer. ① topdressing underground. Generally, you can topdressing urea and other available fertilizers. Trench between rows, apply fertilizer to the ditch, and then cover the soil. Fertilizer can also be diluted, evenly sprayed on the seedbed (ridge, border), and then rinse the plant with clean water. In general, urea is applied 1520 kg per mu, once again after 15 days, and 2 times for 3 times. ② topdressing outside the root. In autumn, 0.2% urea plus 0.3% potassium dihydrogen phosphate solution was sprayed. It is best not to fertilize broad-leaved trees after autumn to prevent seedlings from overgrowing.

Second, watering in time. The method of watering seedlings in the fast-growing period should be taken in more quantities and less times. Each irrigation should be thoroughly and evenly irrigated to prevent scouring the seedlings and harming the stems and roots of the seedlings. Every time topdressing should be watered immediately, if it rains and the soil moisture is better, do not water. In the later stage of seedling growth, watering should be properly controlled (except for special drought, generally no irrigation is needed). If the seedlings are not out of the nursery before winter, they must be watered well.

Third, drainage and waterlogging prevention. There are more Rain Water in autumn, once the seedlings are waterlogged, it has a great impact on the timely emergence of seedlings. Therefore, the drainage facilities of the nursery should be checked in time, the drainage ditch should be dug well, and the stagnant water in the nursery should be detected and eliminated as soon as possible. The plots and plots damaged by Rain Water erosion are required to be repaired in time to ensure that the nursery land is flat and drained smoothly.

Fourth, ploughing and weeding. Most of the nursery beds are covered with plastic film, generally do not need ploughing, you can pull out weeds. When pulling out weeds in the width, the operation should be meticulous and do not hurt the seedlings. If the use of herbicides to control weeds should be tested first to avoid drug damage. The ridge and both sides of the border should be cut and hoed after each rainfall or watering, and weeds should be removed at the same time. For those who are not covered with plastic film, mid-tillage can loosen the soil, reduce evaporation, and play the role of drought resistance and soil moisture conservation. It is usually necessary to plough and weed in time after each rainfall or watering. Ploughing should be deepened one by one, but do not hurt or press the seedlings. For the cutting seedlings of broad-leaved trees, it is necessary to control their few lateral roots, pick buds and remove tillers in time.

Fifth, prevention and control of diseases. High temperature and humidity weather is easy to cause the breeding of diseases and insect pests. According to the growth and pathological conditions of seedlings, the possible diseases and insect pests should be prevented and the diseases and insect pests that have occurred should be prevented and controlled in time. After coring the seedlings in autumn, 1 ∶ 0.7 ∶ Bordeaux solution can be sprayed once. If downy mildew is found, spray 78% Cobo 600 times or 80% ethyl phosphorus aluminum 300 times 500 times. In autumn, the leaves had aged and the new shoots basically stopped growing, mainly in Bordeaux solution of 1 ∶ 1 ∶ 180 times or 1 ∶ 1.5 ∶ 180 times.

Sixth, prevent and control insect pests. Improving the utilization rate of nutrients and light of seedlings and promoting the growth and development of seedlings roots can effectively enhance the resistance of seedlings to diseases and insect pests. In the pest season, insecticide control drugs can be added when spraying fungicides. Dichlorvos 1000-1500 times liquid or Longwei 1 1000-1500 times liquid can usually be selected. It is best to avoid the high temperature at noon and spray after 4: 00 p. M.

Seventh, science comes out of the nursery. After the seedlings have fallen leaves, they should not leave the nursery immediately. This is the process in which nutrients continue to be stored in the roots. In late autumn and early winter, we should investigate the seedlings in the nursery, check the species, varieties and quantity of seedlings, prepare packaging materials and means of transport, determine temporary pseudo-planting and overwintering places, and prepare to leave the nursery. Generally speaking, it is more appropriate to come out of the nursery before and after Lesser Snow. The root damage should be reduced as much as possible when the seedlings come out of the nursery. After raising the seedlings, immediately move to the shady and windless place, select and grade the seedlings according to the specifications of the nursery, and deal with them respectively. The requirements for the specifications of the seedlings are different in different places, and the general condition is that the root system grows well, has more complete main and lateral roots and more fibrous roots, the branches are strong, the development and fullness reaches a certain height and thickness, and there are no serious diseases and insect pests and mechanical damage. Those who do not meet the requirements of coming out of the nursery must not come out of the nursery. Grading and trimming are carried out at the same time, mainly to cut off injured branches with diseases and insects, unsubstantial autumn shoots and malformed roots with diseases and insects. The cut should be smooth to facilitate early healing. In order to facilitate packaging and transportation, overlong and excessive branches can also be pruned properly.