Day lily cultivation technology

1 Selection and construction of sheds

Choose a land with water quality, atmosphere and soil pollution, a slightly higher terrain, sunny leeward, near water source, good drainage, and no ground pests. A simple bamboo frame greenhouse or a steel frame greenhouse is built. The greenhouse is 6 to 8 meters wide and 30 to 40 meters long.

2 kinds of preparation

2.1 Variety selection

Choose strong varieties with high quality, high yield, early maturity, thick flesh quality, resistance to pests and diseases, and drought resistance, such as Panlong species and April flowers in Jinyun county.

2.2 Deep-sloped soil preparation

In the first half months of planting, deep plowing should be carried out for more than 30 cm. In combination with deep plowing, the maturity of high-quality farmhouse organic fertilizer should be 30 to 37.5 t and 750 kg of superphosphate every 1 h. At the same time, plutonium should be prepared and the width should be 1.1 to 1.3 m.

2.3 seed strain treatment.

(1) Trimming the black pedicles in the lower layers of the shortened stems of the excavated plants, cut the roots of the expanded pods on the fleshy root, cut them to 5-7 cm, and remove the decaying roots; Leave 6 to 7 cm and remove the leaves.

(2) Chemical treatment Before planting, the well-conditioned plants should be soaked in a 1000-fold aqueous solution of 50% thiophanate-methyl wettable powder for 10 minutes.

3 Reasonably planted

3.1 timely planting

For the early survival of seedlings, greenhouse day lily earlier than conventional planting, after the seedling leaves on the ground dried, it should be planted, generally in mid-September to mid-October.

3.2 Reasonable close planting

In order to facilitate picking, drainage, and use of space, greenhouse day lily should be used as a pod plantation, with 3 rows per pod, 35-40 cm from the cluster, 1 h-3 planting from 300,000 to 375,000 plexuses, 3 plants per culm, Planting distance of 10-12 cm, 1 h with 900,000-112,500 seedlings.

3.3 Properly planted

The root group of day lily is produced from the short-stemmed stems. It has a one-year layer, bottom-up, and root-grown parts that move up year by year. Therefore, appropriate deep-rooted plants are conducive to the survival of plants, and the suitable planting depth is 10 ~ 15 cm.

4 Field Management

4.1 control the temperature of the greenhouse

The specific measure is that from the time of colonization to the time of seedling growth, the temperature of the shed is required to be higher. The daytime temperature is maintained at 15 ~ 25 °C, kept at above 8 °C at night, no watering, ventilation and temperature reduction when the temperature is above 30 °C in the midday shed; from the time of easing the seedlings to the convulsive period, it should be based on the temperature and humidity in the shed. Ventilation regulates temperature and humidity. The daytime air temperature is controlled at 15~20°C, and is not lower than 10°C at night. At flowering, higher temperature and larger temperature difference between day and night are needed. The daytime temperature is 18~28°C and nighttime is 12~15°C. Appropriately extend ventilation time before and after noon so that the maximum temperature in the shed does not exceed 35°C.

4.2 Cultivated soil

The root system of lily is a fleshy root, which needs a fertile loose soil environment condition in order to promote the growth and development of the root group. During the growth period, the cultivation should be carried out 3 to 4 times depending on the growth and soil compaction conditions. The first time the seedlings are being unearthed In the second, third and fourth time, cultivating soil with cultivator in the convulsive stage.

4.3 Fertilization

1 Top-dressing principle: Day lily requires the application of sufficient winter fertilizer (basal fertilizer), early application of Miaofei, reapplying manure, and supplementing the fertilizer.

2 winter fertilizer (basal fertilizer): should stop growing on the ground part of the lily, that is, after the autumn seedlings withered by frost or planting, mainly organic fertilizer, 1h?

3 Miao Fei: Miao Fei is mainly used for emergence, long leaves, and promote early growth of leaves; Miao Fei should not be too late, should be applied when the lily begins to bud, generally 1 h? Followed by superphosphate 150 kg, sulfuric acid Potassium 75 kg.

4 manure: lily convulsive period is an important period from vegetative growth into reproductive growth, this period requires more fertilizer, should be chase after the calyx began to extract, generally 1 h? chase urea 225 kg, superphosphate 150 Kg, potassium sulfate 75 kg.

5Leaf fertilizer: The bud fertilizer can prevent defer from deferred fat premature aging, increase the rate of bud formation, prolong the picking period, increase the yield; should start picking about 7 ~ 10 days or so, generally 1 h? Topdressing urea 75 kg. At the same time, the leaves were sprayed with 0.2% potassium dihydrogen phosphate, 0.4% urea, plus 1%-2% superphosphate (filtered) aqueous solution every other 7 days, plus 15-20 mg/kg 920. Spraying once after 5 pm has a significant effect on buds and preventing budding.

4.4 timely irrigation

Day lily is sensitive to moisture during convulsions and buds. Water shortage during this period will result in a severe reduction in production. It is difficult to produce calyx, and sometimes it can be produced. However, calyx is small, uneven, and has a high bud rate. The number of buds was significantly reduced, so irrigation should be performed 2 or 3 times depending on the soil conditions, so as to avoid reduction in production due to drought.

4.5 Excavation

After the lily buds are picked, the leaves are picked up promptly and excavated. The depth is 15-20 cm, and the depth is between the rows.

5 Pest control

The common diseases of day lily are rust, leaf spot, leaf blight, yellow leaf disease, rotten disease, and stem blight. The main pests of day lily are spider mites, yellow aphids, thrips, and small tigers.

6 Harvesting

Lily picking time is very strict, not too early and too late, picking too early, light weight of buds, poor color, too late picking buds matured excessively, appear split mouth loose, poor quality; harvesting appropriate period for bud just 1 to 2 h before the cracking, the day lily production is high and the quality is good.

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