In the early part of july, watermelons began to grow in the autumn of beijing, during the period of beijing, with some impact on the production of seedlings in the autumn. In order to ensure the smooth operation of the small watermelon production in the city of autumn, the agricultural technology extension station in beijing specifically offered the autumn house. Guidance on small-scale seed production in watermelon breeding, for use by growers。
Inspection of production facilities to ensure safe production
Rehabilitation of sheds: timely inspection of anchors, membranes and membranes. The timely replacement of ageing, damaged anchors and membranes will tighten loose membrane lines and repair damage to the membranes。
Rehabilitate membrane lines, shantybeams
(c) drainage: to check whether the drains around the shed are unconnected and clean up the drains in time to prevent rain from pouring。
Raintime response: the vents are closed in time for the rains, with the conditions for the installation of a diaphragm in the vents of the shed. It would be preferable to use high-bed seedlings to avoid losses from rain-fed water。
Strengthening field management and nurturing quality seedlings
(b) choice of species: in autumn, production should choose between highly pathological, cosmopolitan and dynamic, small-bearing watermelon species, such as kyosong, kitaori and kyoya no. 1. It is advisable to choose the type of thorium, which is high-temperature-resistant, such as strong thorium and thorium。
Cultivation:
Seed time
Autumn watermelons are usually listed before the mid-autumn and national days, so eeyo should sow in early july (70-80 d before scheduled listing)。
Bridging management
Unlike “temperature control wetness” in the management of seedlings in the early spring, “temperature control wetness” is the key to seeding in the autumn. After two days of marriage, the covering membranes are removed and the water beads on the membranes are shaken off every day. When the fertility rate is 50 per cent, the film is removed in time。
Induced seed "temperature control wetness"
Environmental regulation: the maximum temperature of watermelon seedlings is 18 - 32°c. The weather temperature can be covered with two interior and external shades, covering 10 a. M. To 4 p. M., and should be ventilated and wet in a timely manner to prevent disease。
Fertilizer management: seeing the seed water in the morning and in the morning, see if it's dry and wet to prevent the phenomenon of “high-foot seedlings”. Water should be strictly controlled during rainy weather. In the later stages of seeding, 1,000 times the liquid balance of water soluble 1 to 2 times when the plant is weak and leaves turn yellow。
Pests and pests control: the main diseases of autumn seedlings are fallout and anthrax, and the main pests are aphids and trams. 41 per cent of polypolymamine 800-1,000 times the fluid can be used to combat epileptic disease, 1,500 times the athrax can be used to treat anthrax; 10 per cent of aphids can be used to treat aphids with 1,000 times the aphid powder, and 70 per cent of the améla-dispersed granules can be used to treat aphids with 2,000 times the fluid。
