1 * Dense planting and tending techniques in Hei Hu.

(1) cultivation method: hedge frame: the column is 2.6m long, 12cm thick, *80cm deep, and the clear height of the ground is1.8m. Four rust-proof iron wires are pulled from bottom to top, and the first iron wire is 60cm away from the ground. Erect a column every 8m, and tie branches and vines with iron wires on the frame surface; T-shaped frame: a horizontal beam is arranged at the top of the column to form a small T-shaped support. The total length of the column is 2.8m, and the total length of the beam is1.5m. Three high-strength rust-proof iron wires are pulled on the beam, and the column depth is 80cm, and the clear height from the ground is 2m. One column is set every 6m. Flat-topped frame: the height of the frame is 2m, and one column is set every 6m. The columns in the whole garden can be arranged in a square. The total length of the column is 2.8m and the length is *80cm. The pillars around the scaffold are connected with triangle iron or steel bars, and the grid is drawn between the pillars with thick and thin iron wires to form a flat shed.

(2) Close planting technology: the planting density of hedge frame is 2m×2m, about 160 plants per mu, the planting density of T-frame is 3m×2m, about 1 10 plants per mu, and the planting density of flat-top frame is 3m×5m, about 45 plants per mu.

(3) Fertilization management: base fertilizer: after picking fruits in late June from 65438+1October to1late October165438+1October, apply decomposed organic fertilizer, oil cake and phosphate fertilizer, and then irrigate; Topdressing before germination, applying quick-acting fertilizer mainly nitrogen fertilizer from late February to early March, combined with irrigation, applying urea 6 ~10 kg per mu; Fertilize at fruit expansion stage, after flowering 1 week, apply compound fertilizer 100 ~ 150 g per plant, and apply 6 ~10kg of human and animal manure; Fertilize at the later stage of fruit growth, and apply available phosphorus and potassium fertilizer from late July to early August. To control the application amount of nitrogen fertilizer and prevent the branches from growing slightly, 200 ~ 250 g of phosphorus and potassium fertilizer should be applied to each plant; Top dressing outside the roots, at full flowering stage and fruit setting stage, with 0.3% potassium dihydrogen phosphate or 0.2% urea solution.

2 * Hei Hu plastic trimming technology

2. 1 summer pruning

Except sprouting: except the reserved branches, the sprouting tillers on the rootstock and the long branches sprouting at the base of the trunk or main vine are erased; Picking is the fruit-setting stage. When the spring shoots are semi-lignified, pick the tips of overgrown branches at the 10 leaf or 7-8 leaves above the last fruit. Picking at the15th leaf of the vegetative branch of the spring shoot, if the secondary bud germinates, 3-4 leaves can be left for coring; Thinning: that is, thinning the weak branches of summer shoots and two new shoots sprouting between the same leaf axils that are too dense and too long to affect the growth of fruits.

2.2 winter pruning

Thinning mainly involves thinning over-flourishing branches, over-dense branches, overlapping branches, cross branches, pests and diseases branches, weak and short-shortened branches, budding branches with no use value and fruiting branches without regeneration ability; Through this technology, the yield of Hei Hu can be increased by 24%, and the average fruit weight can be increased by 16%.