Cutting Techniques of Photinia rubra in Summer

Summer cutting technique of Photinia rugosa

Photinia rubra is widely distributed in China, mainly in East China, South Central and Southwest China. With the vigorous development of urban landscaping, it has been introduced and cultivated in Hunan, Hubei, Yunnan, Anhui, Shandong, Hebei and other places. The main method of propagation of Photinia chinensis is cutting, and the survival rate of summer cutting is the highest.

Cutting time

The cutting time of Photinia chinensis in the middle and lower reaches of the Yangtze River is generally early spring cutting in March, summer cutting in early June and autumn cutting in early September. The survival rate of summer planting is the highest, but we must deal with drainage, moisturizing and pest control [Jishan Huayao].

Panicle cutting

The semi-lignified shoots of the current year should be selected as cuttings for panicle strips. Because the semi-lignified twig cells divide vigorously, it is easier to take root. Cuttings cut 6~l0 centimeters in length, too short will affect sprouting, the upper and lower cuts should be smooth, generally leave 1 inch 2 healthy leaves on the cuttings, and subtract 1 inch 1 inch 3 leaves to reduce the water loss of branches. Cuttings after cutting should pay attention to moisturizing, cut as fast as possible, generally cut in the evening, the next morning for cutting.

Rooting agent treatment

After pruning and finishing the branches into cuttings, tie them into a bundle every 100, put the lower part 1-2 cm neatly and soak in the rooting agent, the soaking time should not be too long, generally about 4 hours. The rooting agent should be used at one time and then mixed after use.

Seedbed finishing

The nursery should choose sandy loam with good drainage, low groundwater level, dry and fertile field, and adequate water supply. In the winter of the previous year, a deep flip of more than 30 cm was carried out. Before cutting, 15 kg of ferrous sulfate was sprinkled every 667 square meters to prevent blight. The nursery bed is 1 meter wide and 20 meters long, the middle of the seedbed should be slightly higher than both sides to prevent stagnant water, the soil particles on the bed surface should be fine broken, the drainage ditch between the seedbed should ensure smooth drainage, and the drainage ditch around the field must be dug deeply.

Cutting method

The bed should be fully moistened with a spray can before cutting, so as to facilitate the smooth insertion of cuttings into the soil, and it is appropriate to control the density before and after the left and right leaves do not overlap, generally about 1000 leaves per square meter, and spray carbendazim immediately after sowing. With bamboo arched and inserted on both sides of the nursery bed, the interval is 1.5 meters, cover with plastic film, and seal with soil to maintain humidity.

Later stage management

Need to be reminded that after cutting generally in 15-20 days or so wound healing, produce callus, summer cutting temperature will continue to rise, at any time to pay attention to observe the temperature in the shed, temperature higher than 38 ℃, will cause burning seedling death, to spray water on the film to cool. Generally, new roots and leaves will grow in a month or so. At this time, the seedlings can be gradually ventilated. At first, the two ends of the seedling bed can be opened every other day, and the two ends can be opened a week later. If the ventilation is not timely and the humidity on the bed surface is too high, it will lead to black root rot. After one week of ventilation, the film on one side can be opened in half, and then all the film can be removed after a week.