Generally in the summer greenhouse cherries are basically harvested, but also into the management of the cherry blind period, so Xiaobian finishing summer shed cherry management points, the following detailed list out for farmers to refer to.
Point one, summer cherry cut
Summer shearing of greenhouse cherries is generally performed during the removal of the film, mainly for the retraction of the cherry canopy and for heavy shearing.
1. Retraction method: This method can reduce the overall height of each cherry tree crown by 50 to 80 cm, preventing the longer the tree body, affecting the indoor ventilation and light transmission conditions.
2, cut, sparse method: This method mainly re-cut strong main branch, the middle section of the main branch, let it retract to the middle or rear part of the branch, re-cultivation, development into the main branch.
3, fine pruning group method: mainly by carefully pruning the main branch and the main branch on each branch, branches, remove dense chicken legs, upright branches, overlapping branches, peripheral competition branches, heavy short cut in the long branch , keep the flat branches in the meandering branches.
4, to strengthen the training results of new branches: After the tree after re-shear, will stimulate a large number of new shoots, new branches, suitable for the site should pay attention to the cultivation of a new main branch or result Zhizu; unsuitable part of the timely removal of Meng, Clean up between floors.
Point two, fertilizer management
1. Top-dressing watering: Apply fertilizer promptly after removing the membrane. Between each two plants in each row, dig 30-cm deep, 30-cm wide north-south and 100-cm-long fertilization ditch. Apply nitrogen and phosphorous to each ditch. Potassium compound fertilizer 250-300 grams, after sealing the soil to return to a high ridge, cover the film, soil and seal on the membrane. It is necessary to combine the trenches to cut the roots that have been discovered after excavation, and to renew and shrink the root system so as to reduce the root volume and control the expansion of the tree body. When digging trenches, be careful not to scab the bottom of the agricultural film. Apply water while fertilizing. The second fertilization is carried out in the middle and late September. The fertilization ditch should be excavated on the other side of the planting line. Afterwards, the annual rotation will be sufficient.
2. Spray fertilizer from outside the root: After removing the membrane, shrinking and cutting, combined with disease prevention and extermination, spray 1,000 times of fruit trees for 7 to 15 days. Special-purpose Tianda-2116+0.7% brown sugar+0.3% urea liquid, continuous 3 ~ 4 times. After the end of June, use 0.4% potassium dihydrogen phosphate solution + 0.7% brown sugar solution + 0.3% urea solution and use it alternately. Spray it once every 7-10 days and spray it 3 to 4 times continuously.
Point three, spraying paclobutrazol on cherry trees
Summer cherry trees can spray 200-300 times 15% paclobutrazol every 10-15 days from the beginning of July, and spray 1-3 times in succession to suppress shoot growth and promote flower bud differentiation.
Point four, timely drainage and flood prevention
The cherry trees are afraid of picking, and once the field has accumulated water, the trees will die due to flooding when the time is about 24 hours. Therefore, after removing the film, it is still necessary to raise a high ridge, cover the mulch with a mulch, and use a waterproof rake. When it rains, it is also necessary to pay attention to timely drainage, and it is forbidden to accumulate water between the sheds.
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