What are the slogans for Arbor Day among primary school students?

The most classic ones are:

Common trees include: willow, banyan, pine, cypress, mulberry, etc.

Mulberry cultivation technology

Land preparation

Level the land, remove debris, and carry out deep plowing. There are two methods:

1. Comprehensive deep plowing: before deep plowing, spread 4000 to 5000 kilograms of soil fertilizer or farmyard manure per acre, and plow 30 to 40 cm deep;

2. Ditch plowing: Plow the ditch according to the planting method, with a depth of 50 cm and a width of 60 cm. The topsoil and subsoil should be set separately. Apply 2,500 to 5,000 kilograms of soil fertilizer or farmyard manure per acre on the ditch, return 10 cm of topsoil, and mix well. Deep plowing time: It can be carried out before planting mulberries from November to December.

Planting management

⒈Planting time: December to March of the following year

⒉Planting density and form: 1,000 to 1,200 mulberry seedlings transplanted per acre , there are two planting forms:

⑴ Wide and narrow row planting: Flat plots with good water and fertilizer conditions are planted in wide and narrow rows, and triangles are transplanted in the air. It is required that the large row spacing is 6 feet, the small row spacing is 2 feet, and the plant spacing is 1 to 1.5 feet.

⑵ Planting in equal rows: Platforms and gentle slopes with poor water and fertilizer conditions should be planted in equal rows, with a row spacing of 4 feet and a plant spacing of 1.2 to 1.5 feet.

⒊Variety and seedling treatment:

⑴The mulberry tree varieties are mainly agricultural mulberry series;

⑵S seedling selection and treatment: Separate the seedlings according to size and plant them separately , before planting, cut off withered roots and overly long roots, and soak them in mud to improve the survival rate.

⒋Planting: It is required that the seedlings are straight, the roots are extended, and the planting is shallow and solid. It is advisable to bury the grafting interface about 10 cm into the soil. Water enough to set the roots, and cover with mulch (wide and narrow rows of mulch are 3 feet wide, and equal rows of mulch). 2 feet wide).

⒌Management after transplanting:

⑴Stem cutting: After transplanting, cut off the stem of the seedlings 5 ??to 7 inches from the ground. For winter planting, spring cutting is performed, and for spring planting, stem cutting is performed. Cut as you plant, requiring a smooth cut.

⑵Thinning the buds: Thin the buds when the new buds grow to 4 to 5 inches, and select 2 to 3 mulberry buds with strong growth and reasonable direction for each plant to grow into strong branches.

⑶ Topping: For those with only one bud, do topping when the bud grows to 4 to 6 inches to promote branching and establish a garden early.

⑷ Fill the gaps: After the mulberry buds germinate, check them in time and replant those that are not viable.

⑸ Drainage and irrigation: Water during drought and drain during rainy days to improve survival rate.

⑹ Strengthen weeding and fertilization: timely shallow plowing and weeding, thinning buds, and applying 10 to 15 kilograms of urea per acre, or pouring biogas slurry, feces, etc., and the amount of fertilization is controlled within the mulberry garden. 1/3.

Mulberry garden management

⒈Cultivation of tree shape in young mulberry gardens: Cutting trees about 35 cm above the ground in the spring of the following year after planting, leaving 2 to 3 stumps for each tree. Every year, cuttings are cut along this section to cultivate a low-stem tree with a fist or without a fist.

⒉Cultivating and weeding: Cultivating and weeding are carried out once a year after sericulture, and weeding is generally carried out 2 to 3 times a year according to the growth of weeds.

⒊ Fertilization: Fertilize four times a year.

⑴Spring fertilizer: Apply when the mulberry buds sprout, 20 kilograms of urea per mu.

⑵ Summer fertilizer: Apply after the spring silkworm season, 20 kg of urea per mu, and 25 kg of special compound fertilizer for mulberry trees.

⑶Autumn fertilizer: Apply after the dry autumn silkworm season. Apply 5 kg of urea and 10 kg of mulberry compound fertilizer per mu.

⑷Winter fertilizer: Apply in early December, 1,500 to 2,000 kilograms of farmyard manure per acre.