How to strengthen the daily maintenance and management of poplar, and the management methods of poplar

The best seasons for afforestation are spring, late autumn and early winter. Spring is best

How to strengthen the daily maintenance and management of poplar, and the management methods of poplar

The best seasons for afforestation are spring, late autumn and early winter. Spring is best before soil thawing and seedling germination. At the end of autumn, seedling leaves began to grow in Huang Shi. When the soil is frozen for afforestation, the seedlings are easy to dry up and only the roots are alive. When planting trees, you must follow the super seedlings, transport them and plant them, and don't lose water. If you transport seedlings from other places, keep the roots moist; Seedlings that cannot be planted in time should be transplanted properly. Soak in clear water 1 ~ 2 days before planting. When planting, make the pit big and smooth, plant it straight, fill it in layers, and step on it in layers, so that the roots of seedlings can stretch and connect closely with the soil. The planting depth depends on the dry and wet soil. The more dry and loose the soil, the planting depth should be above 60 cm. In clay and depression, the original soil trace of seedling stem is generally buried at a depth of 15cm. Water immediately after planting, then straighten the seedlings, cultivate the soil and seal the holes.

In addition to loosening the soil and weeding, crops can be planted alternately for cultivation in the first two years instead of caressing. 1-3 young trees are mainly pruned to cultivate upright and strong main branches, remove or control competitive branches, keep auxiliary branches, and prune sprouting strips at the base of main branches. Before the young tree closes, the lower branches of the crown can be pruned or less, and the larger crown can be reserved to increase the photosynthetic area, and the crown length should be kept above 3/4 of the height of the whole tree. For trees over 4 years old, the weak branches under the crown should be pruned after defoliation in winter, and the ratio of crown to tree height should be kept at about 2/3.

Strengthening water and fertilizer management is the key to the rapid growth of poplar. Irrigation is mainly carried out in the dry season from April to June, generally 2-3 times a year. In addition to soil preparation, fertilizer should be applied every115 hectares (per mu)? Except 1500 kg of miscellaneous fertilizer, nitrogen fertilizer is applied twice a year from May to July after afforestation, and 7.5- 15 kg of urea or 0/2.5-25 kg of ammonium bicarbonate/kloc-0 per mu is applied.