Experience of planting jujube root tiller seedlings back to nursery and raising seedlings

Using root tiller seedlings in jujube orchard to raise seedlings is a widely used method to cultivate strong seedlings of jujube trees.

(1) soil preparation, choose loam with flat terrain and water supply as nursery. Ploughing 20 cm deep and applying sufficient farm manure as base fertilizer. It is made into a border with a width of 90 centimeters and a length of 10 meters, with 2 rows of seedlings each. Dig a ditch 30 cm deep and 42 cm wide in the middle of the border. The wall of the ditch is perpendicular to the surface. Shovel the old soil at the bottom of the ditch and sprinkle it evenly with rotten chicken manure or other organic fertilizer.

(2) select seedlings to plant seedlings, separate according to the root diameter, pick out crazy plants and sour jujube seedlings, cut off the overlong inflection roots, and leave the seedling pile (main stem) 10 to 20 cm. The selected jujube seedlings, according to the plant distance (10 cm, 15 cm, 20 cm) close to the ditch wall, 1 side 1 row, at the same time from the adjacent 1 border of topsoil into the seedling drainage ditch, fill 1 / 2 firmly, straighten the seedling pile, and then seal the soil, and stop when filling to 4 / 5 of the ditch. Then fully irrigate and seal the soil to preserve soil moisture in time after the water seeps in. After all the jujube seedlings are returned to the nursery, cut off the overlong stem (seedling pile) 3 to 4 cm from the surface, then repair the ridge and fill in the seedling card.

(3) the management technology of jujube tree returning to the nursery to remove the sprouting, one strong bud was selected in the first ten days of May, and the redundant one was erased. De-sprouting is usually carried out for 2 to 3 times. Irrigation, weeding and soil moisture conservation. When individual jujube seedlings wilt, they are immediately watered. It is more important to increase the high water in the first ten days of July and the thickening water in the first ten days of August. In order to make the seedlings grow normally, the seedlings should be watered 7 times in normal years and 3 times in rainy years. Loosen the soil immediately the day after watering. It is not suitable to apply more fertilizer before topdressing seedlings are 20 cm high. Urea was applied once in the first and middle of June, 60 kg per hectare. At the same time, 0.1% potassium dihydrogen phosphate, 0.3% urea and 0.1% borax were sprayed outside the root, and quick-acting nitrogen fertilizer was applied in the first, middle and last ten days of July. Topdressing was applied once in the first ten days of August to meet the nitrogen needs of rapid growth of jujube seedlings. Stop topdressing after mid-August and carry out intermediate ploughing and weeding in time.