First, cuttings and seedbed preparation. The semi-lignified shoots that were born in the same year as the big-leafed double-sided safflowers followed by the mother trees were cuttings. Cut the cuttings to a length of about 8 cm. Cut the upper part at the uppermost section of 5 mm. Cut the lower part at a depth of 3-5 mm at the end of the distal section to a 45-degree slope. Remove the lower 2-3 leaves and keep the upper part tender. Strong leaves 3-5 tablets. The base of the cuttings was quickly soaked with 20% naphthaleneacetic acid 600 times for 10 seconds; the leaves were kept clean. The cutting substrate is made of 3cm thick rough sand and 8cm thick yellow earth. The seedbed is north-south and is 10 meters long, 1 meter wide, and 20 centimeters high. The cutting bed was disinfected with 0.5% potassium permanganate solution; 2 kg of calcium magnesium phosphate fertilizer was applied to each surface; the nursery bed was under the awning, the shed was 1.8 meters high and the shading rate was 90%.
Second, cutting and post-cutting management. Spring and summer can be cuttings, plant spacing 4 cm 5 cm, inserted about 500 per square meter, the depth of 2 cm or two internodes is appropriate. Immediately after the insertion, cover the plastic arch shed 50 centimeters high and use a compacted soil around the membrane. After the plugging machine is completely closed, it is generally not necessary to supply water until the film is removed. When the temperature in the film exceeds 35°C, the film is cooled at the two ends of the film in time to prevent "smuggling". After cuttings, the callus and rooting of the cuttings were observed every 7-10 days. It was found that underground pests harmed the callus and new roots, and were killed by poison baits. In the 40 days after the cutting, gradually ventilate and remove the film; after 60 days, all the sunshade facilities were removed. After uncovering the membranes: (1) Remove the dead leaf weeds on the seedlings every 7 days to reduce the source of the disease and increase the air permeability and translucency. (2) Dressing strong seedlings, a small amount of topdressing 0.5% urea plus potassium dihydrogen phosphate or low-concentration organic fertilizer. (3) Do a good job of prevention and control of pests and diseases. Spray 50% carbendazim 1000 times and 70% thiophanate-methyl 800 times every 7-10 days; find the larvae of the moth-eaten caterpillar and use 2.5% deltamethrin 3000 times solution. spray. (4) Pre-moisturizing watering regularly and later slightly hardening the seedlings.
The safflower transplanting seedlings following the wood has accelerated the propagation speed. As long as a reasonable selection of cuttings, grasping the cutting time, creating a rooting environment suitable for panicles, and strengthening the management of fertilizer and water and temperature and light control after plugging in, will greatly increase the rooting rate, survival rate, and thus for the industrialization of big-leaf double-sided safflower , Scale production to create conditions.
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