In order to select small watermelon varieties that are suitable for cultivation in early spring sheds in Shanghai suburbs, which have high yields, good quality, strong resistance, and moderate fruit types, we have introduced several new test varieties of small watermelon varieties for their low temperature fruit setting and units. The area yield, quality, taste, resistance, etc. are tested and the test results are reported below. 1 Test Method 1.1 Variety Century Spring and Autumn Period (Fengle), Early Spring Red Jade (Micun), Chunguang, and Takebit. 1.2 Cultivation Density At least one shed (at least 330m2 per shed) is planted for each cultivar, and the row spacing is 3.0xO. 38m, 585 plants per 667m2. 1.3 Test process Nutrition seedlings, sowing on January 4, February 6 (2 to 3 leaves) transplanting, pouring enough water. After the planting, the mulch is planted, the 3m arch shed is placed in the early stage shed, the 2m arch shed is set in the arch shed, and the arch shed is gradually removed later. The first pollination of melons on March 26-31 was pollinated (treated with sessin), and ripening and harvesting began in late April. 1.4 cultivation management 4 membrane (3 layers of greenhouse film + plastic film) cover climbing cultivation, the main vine type 3 vine pruning, artificial pollination combined with fruit processing, single plant staging selected left 2-3 fruit. Apply 50kg Norwegian potassium sulfate compound fertilizer (N:P20s:K20=15:15:15) and lookg rapeseed cake as basal fertilizer per 667m2, apply topdressing compound fertilizer lOkg/667m2 after fruit set, and spray thiophanate-methyl 800 on February 20th. Doubling 1 time. 2 Test results 2.1 Among the 4 small watermelon varieties with growing trend and resistance, the spring and autumn of the century were growing steadily. In the early spring, the red jade, the spring light, and the Bitou growth were all strong, and the four varieties were all good in resistance and no disease occurred. 2.2 Appearance of the four small watermelon varieties are oval-shaped flowers, century-old spring and autumn skin is a light green bottom covered dark green narrow strips, rules are clear, round and full appearance; early spring ruby ​​skin is green and green Narrow belt, clear rules, round and full appearance; spring peel is a green bottom covered dark green narrow belt, fruit type index is slightly smaller, roundness is normal; bit bit peel is a green bottom covered dark green narrow belt, fruit type The index is slightly larger and the appearance is full and round. 2.3 Settlement and yield of 4 small watermelon varieties, the century spring and autumn low temperature fruit setting is good, the first seedlings per plant 1.6, average fruit weight 2.5kg, up to 3.5kg, yield 2340kg/ 667m2, the final production of the highest 3440kg/667m2; early spring red fruit settling temperature, the first single planted fruit 0.9, the average single melon weight 2.2kg, up to 2.8kg, yield is 1lOOkg/667m2, the final yield 2890kg/667m2; Spring low-temperature fruit setting, 1.3 in the first plant, average fruit weight of 2.3kg, up to 3.1kg, 1160kg/667m2, final yield 3110kg/667m2; Bits were generally characterized by low temperature and fruit set. The first seedlings were planted with 1.1 fruit, the average fruit weight was 2.0 kg, and the highest was 3.0 kg. The first crop yield was 1290 kg/667 m2, and the final yield was 2930 kg/667 m2. 2.4 Indigo color, profile and quality Among the four small watermelon varieties, the spring and autumn of the century was red, with a crisp texture, a central sugar content of 12.9%, a sugar content of 9.4%, a peel thickness of 0.5era, and storage stability. Good; Red Jade in early spring is red, crisp, fine, center sugar 13.0%, edge sugar 8.6%, skin thickness 0.4em, storage and transportation in general; spring is red, crisp, central sugar 13.0%, edge sugar 9.0%, peel thickness 0.5em, general storage and transportation resistance; take bit as red peony, crisp, center 13.2% sugar, 10.4% sugar, sugar The middle gradient is the smallest, the peel is 0.4 cm thick, and the storage and transportation are general. 3 Conclusions Based on the above test results, four small watermelon varieties, Hongyu, Chunguang and Nabit in the early spring and early spring, are suitable for greenhouse cultivation. Among them, the temperature in the spring and autumn of the centuries is good for fruit set, the results are numerous, single and large, and the yield is high. A new fine variety is promoted for planting. Author: Wu return the ball (agricultural seeds and seedlings Ltd., Shanghai 201106)
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