Guava is a dioecious plant, male plants only flowering not result, but to identify the male and female plants is a technical problem, only after flowering, can be identified from the flower. At present, the key technologies are as follows: Prepare before broadcast Soil preparation and fertilization: Choose a sandy loam with deep, fertile and well-drained soil, deep plowing of the land, and thinning and leveling, dig 50 to 100 cm wide and 30 cm wide at a spacing of 1.5 m to make the soil weathering mature. Before the spring planting, Mu applied 5,000 kg of composted compost, earth miscellaneous fertilizer, cake fertilizer, superphosphate and other mixed compost 5000 kg into the ditch, mix well with the ditch, and then fill the ditch with fine soil, and then drench the ditch. 2 to 3 days after the shallow plough 1 times, when the soil is dry and wet for moderate planting. Breeding methods: mainly seeds and roots. Melon is warm and humid. It is more cold-tolerant, drought-tolerant and stagnant. The seeds are easy to germinate, the germination temperature is 25 to 30°C, the germination rate is 60% to 80%, and the seed life is 2 years. Seed breeding: Select seeds with large grains, soaking in warm water for 2 days and 3 months, soaking 1 day and night, sowing by 100cm spacing, 50cm plant spacing, germination seeds can also be used for seedbed nursery or square seedling transplanting. Due to the fact that Gualou is a dioecious plant, seed propagation is difficult to control its male and female plants. Dividing roots: breeding females can be selected for planting, collecting fruits, and collecting pollen. Winter and early spring can be planted from February to March. 60 to 75 centimeters of row spacing and 45 to 65 centimeters of nest space to dig nests. The selected roots will be selected, 2 to 3 knots per nest, and the root will be placed in the nest. ~ 13 cm a little tight, dry soil to water. Field management The field management of Gualou is relatively simple, mainly including thinning, weed control, fertilizer management and pruning. Seedlings, weeding and weeding: seedling height 10 cm time seedlings, leaving 2 to 3 seedlings per hole. After planting, we should weed and weed every spring and autumn each year. During the growth period, the growth of weeds is considered and removed in time. Fertilizer management: After each cultivating and weeding, livestock manure should be applied. Spray 10% 0.1% to 0.3% urea mixed diluted solution 10 days after transplanting; when the seedling height is 1.5 meters, apply topdressing urea once again; 5, 6, and 7 months to apply topdressing compound fertilizer once again; Apply calcium phosphate and compost. In the second year, the top dressing was applied twice. When the seedling height was 30 cm, 500 kg of cooked manure or 30 kg of cake fertilizer, 10 kg of urea, and 1500 kg of earth-fertilizer were mixed and applied in the trenches. Before the flowering in mid-June, Apply 1,000 kg of cooked manure or 50 kg of cake fertilizer, 20 g of superphosphate, and 500 kg of soil miscellaneous fertilizer per acre. In the event of drought, it is necessary to water in a timely manner to keep the soil moist. Frame: When the seedling height is about 33 cm, a pillar or scaffolding is erected, which can be led to nearby trees to help them climb. From the second year after planting, buds should be pruned each year, and 2 to 3 vines should be kept in each plant to remove other axillary buds and branches. Pruning and squatting: When the tower leads the vines, remove the excess vines, leaving only 2 or 3 strong vines per plant. When the main vine grows to 4 to 5 meters, the top buds are removed and the lateral branches are promoted. The stems on shelves should be promptly sorted and distributed evenly. Artificial Pollination: The natural seed-bearing rate of cucurbits is low, artificial pollination is used, the method is simple, and the yield can be greatly improved. The method is: using a brush to collect the pollen of the male flower in a Petri dish, and then use a brush to pick up the pollen, and apply it to the stigma of the female flower.
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