Precubation in watermelon is a critical stage in determining production and quality. The author visited the main areas of watermelon production in shandong changle and guangxi nanning, and, in the light of 20 years of combat experience in guanon, drew up eight key management points to help growers avoid common faults and cultivate strong seedlings。
I. Selection of seedlings as a basis
1. Leaching: 55°c warm water immersed for 15 minutes, decorated skin dormant
Drumbs: 24 hours at 28°c and 90% white
3. Substrate formulation: grass-grass and earth: cylindrical: pearl rock = 5:3:2, ph 6. 0-6. 8
4. Temperature control: 30°c/25°c during the day/night before seeding and 3°c after the leaf spreads
Ii. Five keys to emplacement
1. Tribaby is the optimal planting period (25-30 days)
Pre-plant seedlings: gradual reduction of humidity 7 days in advance
3. Start-up specification: 30 cm height, 80 cm width, 1. 8-2 m line distance
4. Depth of planting: nutritional earth blocks and ablaze
5. Stemming root water: 50 kg per acre to decomposed manure to increase temperature
Iii. Equivalent management
Slow-up periods: 60% soil moisture maintained, ec value <1. 2ms/cm
2. Chicken stretch: 5kg per acre for high nitrogen water soluble fertilizer (20-10-20)
3. Inflated melon period: 0. 3% potassium dihydrophosphate + 0. 1% boron sprayed on the leaves sand
4. Control of water 7 days before harvest to increase sugar by 2-3 degrees
Iv. The laws governing the temperature of gold
1. Shrimp duration: 28 - 32°c during the day, 18 - 20°c at night
2. Roast stretch: 25-28°c during the day and above 15°c at night
3. Vegetation period: temperature difference between day and night at 10-12°c
4. Avoid burning of leaves at high temperatures of 35°c
V. Green pest control
1. Paraquat: 72. 2% froscilides 800 times liquid irrigation root
Aphids: yellow sticky board (20 pieces per acre)
3. Red spiders: release of dictums (benefit 1:50)
4. Epidemic: 58 per cent of the initial spray of mercuric manganese zinc 600 times
Vi. Complete tests
1. Three whole chickens: preservation of the main chicken and two strong chickens
2. Artificial pollination: picking male spots at 7-9 a. M. Tut
3. Location of remaining melons: female chickens 2-3 and female chickens 1-2
4. Discovery principle: 1 - 2 melons per plant at 5 - 6 intervals
Vii. Responsibilities for shoot shoots
1. Identification of seedlings within 3 days of planting and timely replanting of seedlings
2. Replanting of seedlings with soil and root agents
3. Double-gauge space of less than 15 cm in saplings, debilitation
4. Follow-up of thin dung after seedlings to promote restoration of root systems
Extreme weather response
1. Following heavy rains: drainage immediately, application of 5 kg lime ph
2. Hail disaster: cutting of damaged leaves and spraying of moss
3. Sustained rain: 4 hours/day for artificial light and 50 cm for led lamps
4. Spring winter: night-time build-up of small arch sheds to raise temperature 2-3°c
Watermelon sprout management is "three look": warm, watering, fertilization. In particular, it is reminded that the marriage of seedlings (silver wood) needs to be sensitive to the healing of the interface and to avoid contracting cyanosis. # watermelon planting #
