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如何管理雪松更好的种植雪松

作者: 雪松价格 浏览次数: 时间:2018-12-12 09:41
  雪松侧枝平展,冠似宝塔,姿势雄伟,四季常青,是优雅的观赏树种之一。雪松一般采用实生幼树移栽。为扩大种源、满足市场需要,这里介绍一种移苗新技术——芽苗移栽。
  1、建筑温床
  选择地势高燥、向阳的沙壤土建筑温床,床宽1米,长度视种子多少而定,温床高出地面30-40厘米,床面中间稍高,四周可用砖砌或泥堆,内铺纯净细沙。温床上面撑竹弓覆盖。农用塑料薄膜。
  2、种子处理
  雪松种子空粒较多,因此需进行选种,将空粒去除,播种前用冷水浸种1-2天,再用0.3-0.5%的高锰酸钾溶液浸泡半小时到1小时。
  3、适时播种
  温床播种的播期略早于直播田。一般二月下旬至三月上旬播种。播前温床用水浇透,而后将种子均匀地播于沙上,务必将种子的大头向上,播后盖1.5-2厘米厚的沙子。每平方米播一两种子。温床内经常保持湿润,温度控制在30℃以内,天气转暖温度过高时,需及时将塑料薄膜揭开,并喷水保温。
  4、芽苗移栽
  种子约于3月下旬至4月下旬出土。4月中、下旬苗木子叶全部展开,这时苗高4-7厘米,主根长4-8厘米,侧根尚未生出或刚开始生长,应及时将这样的芽苗移植至大田或容器中。移栽时,将芽苗从沙床轻轻挖出,放在预先装有清水的盛苗器内。
  移入大田,用一根宽2厘米的剑形竹签,插入土中,开出比芽苗的根略深一些的穴缝,将芽苗根部随即放入土中。
  如用容器移栽,可采用高20-25厘米,直径7-10厘米的通底塑料袋,装满营养土,整齐地排列在1米宽的苗床上。移栽芽苗,要掌握土壤不能过干过湿,芽苗宜小不宜大。一般移栽后10-15天,幼苗相继长出新根。大田移栽的株行距为30×30厘米。
  5、苗期管理
  苗期管理要掌握以下要点:
  (1)移栽床上需搭盖1米高的荫棚。晴天早盖晚揭,8月中、下旬拆除。
  (2)苗床土壤水分不宜过多,切忌积水,雨季需及时排水。
  (3)防止蛴螬、地老虎等地下害虫及立枯病的危害。
  (4)常给苗床松土除草。
  Cedar is one of the elegant ornamental tree species with its flattened lateral branches, pagoda-like crown, magnificent posture and evergreen seasons. Cedar is usually transplanted with young seedlings. In order to expand the provenance and meet the market demand, this paper introduces a new technology of transplanting seedlings - bud seedling transplanting.
  1. Hotbeds for Buildings
  Choose the sandy loam hotbed with high dry terrain and sunshine. The width of the hotbed is 1 metre and the length depends on the number of seeds. The hotbed is 30-40 centimeters above the ground. It is slightly higher in the middle of the bed. Bricks or mud piles can be used around it and pure fine sand can be laid inside. The hotbed is covered with bamboo bows. Agricultural plastic film.
  2. Seed treatment
  Cedar seeds have more empty grains, so it is necessary to select seeds, remove the empty grains, soak them in cold water for 1-2 days before sowing, and then soak them in 0.3-0.5% potassium permanganate solution for half an hour to one hour.
  3. Timely sowing
  Hotbed sowing date is slightly earlier than direct sowing. Generally sown from late February to early March. Before sowing, the hotbed is watered through with water, and then the seeds are evenly sown on the sand. Make sure that the big head of the seeds is up and the sand is 1.5-2 cm thick after sowing. One or two seeds per square meter. Hot beds are often kept moist, the temperature is controlled within 30 degrees Celsius, when the weather warms up too high, it is necessary to timely uncover the plastic film and spray water to keep warm.
  4. Transplantation of Buds and Seedlings
  The seeds were unearthed from late March to late April. The cotyledons of the seedlings are all unfolded in the middle and late April. At this time, the seedlings are 4-7 cm high, the main roots are 4-8 cm long, and the lateral roots have not yet emerged or just begun to grow. Therefore, the seedlings should be transplanted into the field or containers in time. When transplanting, the buds and seedlings are gently digged out from the sand bed and placed in a seedling container pre-equipped with clear water.
  Move into the field, insert a 2 cm wide sword-shaped bamboo stick into the soil, open a slightly deeper hole than the root of the bud seedling, and then put the root of the bud seedling into the soil.
  If transplanted in containers, plastic bags with a height of 20-25 centimeters and a diameter of 7-10 centimeters can be used to fill nutrient soil and arrange them neatly on a seedbed 1 meter wide. When transplanting buds and seedlings, it is necessary to master that the soil should not be too dry and wet, and that the buds and seedlings should be small rather than large. In general, 10-15 days after transplanting, the seedlings grow new roots one after another. The row spacing of transplanted plants in the field was 30 *30 cm.
  5. Seedling management
  The following points should be mastered in seedling management:
  (1) The transplanting bed should be covered with a 1-meter-high shade shed. Early cover and late uncovering in sunny days, demolished in mid-and late August.
  (2) Soil moisture in the seedbed should not be excessive. Water accumulation should not be avoided. Water should be drained in time during rainy season.
  (3) Prevent the harm of underground pests such as grubs and ground tigers and standing blight.
  (4) Soil is often loosened and weeded in the seedbed.
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