Suitable germination temperature for planting phellodendron amurense seeds
Seed germination treatment before sowing:
In order to make seeds germinate quickly and orderly before sowing, it is best to accelerate germination. There are many empty seeds of Platycladus orientalis. After dividing the water, take out the floating empty seeds.
Soak the seeds in 0.3%-0.5% copper sulfate solution 1-2 hours, or soak the seeds in 0.5% potassium permanganate solution for 2 hours to disinfect the seeds. Then, accelerate seed germination.
Germination acceleration mode:
First, the snow-mixed burial method
Choose a place with lee, shade, good drainage and convenient management. When the snow hasn't melted after winter, mix the seeds with three times the snow and put them in the store.
The barn should be surrounded by straw curtains and snow with a thickness of 10 cm, mixed with seeds and snow.
Bundles of straw are wrapped around the barn to prevent the snow in the barn from melting in early spring.
Keep the snow for 3-5 days before sowing and take it out. After the snow melts completely, the screened seeds are scattered in the shade to remove impurities, and then the seeds can be planted.
You can also mix the seeds into fine sand before sowing 1 week, after snow melting, dry in the sun, turn over, heat and moisturize, and when 1/3 seeds crack, sieve out or mix the sand and sow in time.
Second, the method of accelerating germination by mixing sand
When the seeds are sown too late to hide in the snow or the amount of snow is too little in winter, sand mixing can be used to accelerate germination 15-20 days before sowing.
Soak the sterilized seeds in warm water for 24 hours.
Then, take out the seeds, mix them evenly with fine sand twice the volume of the seeds, and put them in a wooden box without water. The temperature of seed sand is always kept at 12- 15℃, and the seeds are turned over 2-3 times a day, and warm water is sprayed at any time to keep the proper temperature and humidity to promote seed germination.
When some seeds have germinated and there are 1/3 seed cracks, they can be planted.
Thirdly, soak the seeds in warm water to accelerate germination.
Soak the sterilized seeds in 45cC warm water for 24 hours, and take out the floating empty seeds in combination with seed selection.
Then take out the seeds, spread them on the mat at leeward and sunrise, turn them over frequently, keep the necessary humidity, and wash them with warm water 1-2 times a day.
After 5-6 days, 1/3 seeds crack and can be planted.
Sowing method:
Platycladus orientalis is suitable for spring sowing, but the sowing date is different because of different weather conditions in different places.
Platycladus orientalis grows slowly. In order to prolong the seedling period, according to the local weather conditions, it is advisable to sow early, such as in the middle and late March in North China, in the late March to early April in Northwest China and in the middle and late April in Northeast China.
The seeds of Platycladus orientalis have many empty grains, which are usually germinated by water selection before sowing.
In order to ensure the yield and quality of seedlings, the sowing amount should not be too small. When the seed purity is above 90% and the seed germination rate is above 85%, the sowing amount per mu is about 10 kg.
In northern China, Platycladus orientalis is raised on high ridges or ridges, and in some arid areas, it is also raised on low ridges. ?
Before sowing, water should be poured through the bottom, and then seeds should be pushed by hand or ditched by hand.
When sowing, ridge sowing: the width of ridge bottom is 60 cm, the width of ridge surface is 30 cm, and the ridge height is 12- 15 cm. Two rows or single rows can be planted in each ridge, with the width of double row drilling being 5 cm and the width of single row drilling being 12- 15 cm.
Sowing in the same bed: bed length 10-20m, bed width 1m, bed height 15cm, vertical (along the bed) drilling of 3-5 rows per bed, sowing width of 5- 10cm, horizontal drilling width of 3-5cm and row spacing of 655.
When sowing, the ditching depth should be consistent and the sowing should be uniform. After sowing, the soil should be covered 1- 1.5 cm in time, and then spring pressure should be applied to make the seeds closely connected with the soil, which is beneficial to seed germination.
In arid and windy areas, in order to keep soil moisture, grass can be used to cover the soil when conditions permit.