Cultivation techniques of white sandalwood

White sandalwood trees, also known as ash, broken seed trees, black wood, seed trees, gate wood, etc., are deciduous shrubs or small trees of the genus Alba of the family Alba, widely distributed in northeast China and the south of the Yellow River, especially in the provinces south of the Yangtze River Valley. They have the advantages of tolerance to dry, early and barren, developed root system, strong germination, easy reproduction and so on. Let's take a look at the cultivation techniques of white sandalwood.

Growth habits of white sandalwood

White sandalwood was born on hillsides, roadsides, sparse forests or dense forests at 760-2500 meters above sea level. Like warm and humid climate and deep and fertile sandy loam, Xiguang is also slightly resistant to shade. The deep-rooted tree species have strong adaptability, cold resistance, drought resistance and barren resistance, and the growth is the best on both sides of the river and the edge of the village. There are more in the south, this species is suitable for both north and south, white flowers and blue fruits are good as flower hedges or forest edges and roadsides.

Seed collection of white sandalwood

Select the middle-aged white sandalwood tree as the seed mother tree, the seed collection time from late September to October, do not skim green and pick early. The postharvest fruit needs to be composted for 3 to 5 days. After the pericarp is soft and ripe, it is scrubbed repeatedly in a cloth bag to remove the pericarp and impurities to get seeds. The weight of a thousand seeds is about 140 grams, and the water content should be kept at about 30%. Do not lose water, and should not be dried or stored in the sun.

Seed treatment of white sandalwood

White sandalwood seeds should absorb enough water before sowing or treatment. The water permeability of the seed is good, and the water absorption of the seed can reach 3040% after soaking for 24 hours. Forced dormancy can be used for acid etching treatment: acid etching with a specific gravity of 1pj84 concentrated sulfuric acid for 5 hours and then rinsing in running water for 18 hours, so as to reduce the restraint of seed shell on seed embryo and increase the air permeability of seed coat. Gibberellin treatment can regulate and relieve the physiological dormancy of seeds.

Nursery selection of white sandalwood

Choose the nursery land which is sheltered from the wind and cool, flat without stagnant water, convenient for drainage and irrigation, and the soil quality requires loose, moist and sandy loam. Soil depth of 20cm to 30cm, removal of stones, weeds, combined with ploughing into high-quality mature organic fertilizer 45 tons per hectare. At the same time, the nursery should be combined with soil deep digging and sun exposure, insecticidal and sterilization, 50% zinc, sulfur and phosphorus 2 g / square meter, mixed with appropriate amount of fine soil, scattered on the soil, and covered with soil. Sterilization with 3 grams / square meter of zinc, mixed with appropriate amount of fine soil, sprinkled on the soil. Then leveling the seedbed, the seedbed moves from east to west, slightly suppressed and then sifted with a layer of 10 cm matrix, the bed surface is 1 meter wide, the bed height is 20 cm, and the trail is 35 cm wide. If you make a bed and sow seeds in the sunny open area, you need to build a shade shed with a height of about 1m. It is required to cover a double-layer sunshade net to reduce the light intensity in the nursery.

Timely sowing of white sandalwood

The sowing time of white sandalwood is in the middle and last ten days of April, and the sowing method is artificial sowing or strip sowing, which can sow 12 grams per square meter and cover the soil shallowly. The row spacing of strip sowing is 20 cm, and the depth of sowing ditch is 8 cm. First, the rotten base fertilizer is applied at the bottom of the ditch, which is covered with 6 cm thick garden soil, and then sown. If transplanting bud seedlings, the sowing density can be increased, and the sowing rate is 75100kg / mu. After sowing, the covering soil is 1cm thick, preferably covered with straw, which can moisturize and restrain weeds. The thickness of the grass cover can ensure that the seedbed is too dry and wet.

Management and maintenance of white sandalwood

The main results are as follows: 1. generally, the seedlings began to be unearthed at the beginning of May, when the weeds in the nursery should be pulled out in time, combined with loosening the soil, and 11% dilute nitrogen fertilizer and water should be applied to facilitate the growth of seedlings. If the small land tiger harms the seedlings at the seedling stage, it can be sprayed with trichlorfon and pyrethroids. In serious plots, 2.5% trichlorfon powder was sprayed before the 3rd instar of the larvae.

2. Usually June to September is the peak season for the growth of white sandalwood seedlings, so it is necessary to weed frequently and fertilize more, and nitrogen fertilizer is the main fertilizer. Deep ditches should be dug around the seedling bed in the rainy season to facilitate drainage to prevent stagnant water from hurting the roots in rainy days. Potassium fertilizer should be applied in fertilizer and water from July to August to promote the Lignification of seedlings and enhance their resistance, and no more fertilizer should be applied after September.

3. There is a period of flower bud formation around September every year. At this time, it is necessary to consciously control watering to make the stems and branches slightly soft to facilitate the formation of flower buds. Perhaps keeping dry at this time will lead to the spread of red spiders, but when red spiders do slight harm, it will promote the formation and differentiation of flower buds, and this phenomenon is more obvious in its spotted brocade varieties.