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Haimen City, Jiangsu Province has a long history of cultivation of citrons. The cultivated citron has been known for its fragrant, delicious and nutritious properties. It is fragrant and sweet, crisp and not sticky, stewed, burned and fried. Shamrock is a kind of real-life variation in Toona sinensis. Based on the investigation of the whole city's cultivated citron system, the authors selected sizes that are relatively uniform; the roots of the annual two-leaf clover and five-leaf fragrant cultivars were planted at multiple points, and the same technical measures were used to cultivate and manage the plants. , performance characteristics, its roots, stems, leaves, flowers and other organs were investigated in detail, the harvest period of their root traits were examined, are described below. 1. The characteristic characteristics grow vigorously, grow strong, and have a long growth period. The whole growth period is 210 days, which is 20 days longer than the growth period of the old cultivar. Compared with the five-leaf fragrant, its appearance was 1.72 times longer than the five-leaf fragrant, the leaflet length was 1.70 times, the leaflet width was 1.82 times, the commercial root weight was 18.4 times, and its transverse and longitudinal diameters were five-leaf fragrant. 2.48 times and 2.49 times, the flag flap and the wing flap are the same color, while the five-leaf incense flag flap and the flap flap are different in color, that is, the flag flap is yellow-blue and the wing flap is lavender. 1 root. The lateral roots (also known as “ribsâ€) of the toon, which occur from the seeds, form a “root festival†when they grow to a certain time. Each “section†can develop into 1-2 small toon roots, and the roots shoot more. Lateral roots, root segments are formed on the lateral roots, so repeated repeatedly. Its bulbous roots are yellowish on the surface of the epidermis, have smooth epidermis or irregularly interrupted bands, and are irregularly oval, elliptical, or circular in shape. Annual cone weight 8-150g, the largest single weight 400g. For perennial cultivation, the longer the number of years, the larger the monomer, the size of its monomer and the difference in soil, fertilizer, and plant growth are all very much related. 2 stems. The top of the bulbous root of Toona sinensis buds and grows upwards, exposing the mud surface and developing into a stem. Stem vines grow indefinitely, climb up, right-handed upwind; stem vines up to 2.5m; stems round, dark green, 2.0mm in diameter; mostly false branches. The stem length 10.5-21.5cm. 3 leaves. Odd pinnate compound leaves, alternate. The number of leaflets of trifoliate leaves was 3. Leaflets are ovate, leaf margin smooth and no teeth; mature leaves dark green, young leaves yellow-green; leaves are smooth and hairless. The primary leaflets are 8.0 cm long and 6.0 cm wide, with slightly smaller lateral leaves. 4 flowers. The leaf axils occur from the vine, the inflorescence is complex racemes, the flowers are dense, and the flowers are sessile. They grow directly on the flower axis. The three-leaf fragrant flower axis is mostly three flowers per section; the butterfly corolla, born green-white. After the flag flap, wing flap is greenish yellow. Two stamens, one filament, nine filaments, one anther, light brown, stigma light blue, five-flowered fragrance, flashy. Flowering from late June to late September. 2. Efficient cultivation techniques 2.1 The sorghum arrangement arranges the clover cultivars like Hi light and good ventilation, avoiding heavy smashing. Foreparts should be cultivated with lettuce, broccoli, and some leafy vegetables or blanks, and there should be no shelter around the field. 2.2 When cultivated in the field, the clay-rich loam should be selected. Year ago, the planting land was generally deep-swapped 1 times, and the depth was about 20cm, so that the soil was fully frozen. Before the planting, the soil blocks were broken and smashed, and the sorghum was leveled and built into high sorghum. Each 4th row was built into 1 and the width was 200-230cm. , 10cm high, the aisle doubles as a drainage, the walkway is 33cm wide. Apply sufficient basal fertilizer before planting, apply organic liquid fertilizer 2.0-2.5t per 667m2, sheep manure 1.5t, superphosphate 15kg (or 20kg nitrogen-phosphorus compound fertilizer). In addition to decomposed organic liquid fertilizer applied to the inside and outside, the rest of the base fertilizer must be applied between the rows, otherwise it will cause rough root skin (patch, phosphate fertilizer, etc. can not be in direct contact with the roots). 2.3 Timely planting Seed selection carefully before sowing, the selection of ball roots is positive, no roots for pests of the species for seed, seed a single size 8-10g, years ago, after years can be sown. Under normal circumstances, the appropriate late planting, sowing on April 20 is the most appropriate. When sowing, use the hoe to open the line, vertical to the walkway, line depth 12cm, spacing 43-56cm, plant spacing 8-10cm. In accordance with the soil fertility, the fertility is full, and the density is thin. After the line is opened, the decomposed organic liquid fertilizer is applied to the base to make the base fertilizer. Seeds are sown 1–2 days after fertilization. Each hole is sown with a small root. Seeds of different sizes are sown separately. Do not sow seeds too lightly, otherwise the root swelling, easy to expose the soil surface, resulting in split skin, known as "coarse" camphor. 2.4 Field management 1 scaffolding vines. In the first half of May, when the pods emerged and the vines grew out, they should promptly lead the vines to scaffolding. The reed stalks and bamboo vines were used as materials, each of which was 1.8-2.0 m long. Insert the rack into the middle of the row and insert one per hole. Each of the 14 rows (7 per row) of the two rows are bundled together to form a “person†frame, and then the reed stalks or bamboo sticks will be used. Put together to enhance wind resistance. The variety grows vigorously and the vines are long. Therefore, the shelf material is higher than that used in the cultivation of the five-leaf fragrant cultivars. The shed must be placed firmly to prevent the production sheds from affecting the yield. 2 grass, pest control. Before spraying, one spray of dole or acetochlor herbicide was sprayed. A comprehensive eradication of the weeds in the garden before scaffolding. In late June-early July, wheat straw is scattered between the rows. On the one hand, it can play a role in conservation and on the other hand it can achieve the effect of herbicide. Broad bean shell should not be used as a cover, because its alkaline will affect the soil quality. 3 top dressing. In early June, the first fertilizer was applied after emergence, and small fertilizer was used. It was advisable to use diluted manure water, and 1,000 kg of diluted manure water was applied at 667 m2. From late June to early July, the topdressing of urea was 25kg/667 square meters. After the beginning of autumn, the top 3 fertilizers were applied at 25kg/667 square meters. After the summer is no longer top-dressing. 3. Harvesting and Storage The variety has a long growing period. In early November, its vines have not yet withered. After all the vines have naturally withered, they should dig for food. Digging too early, it is unfavorable. Digging before frost is easy to cause variation in the variety. After the small roots are sown, the number of plants that grow out of the compound leaves will increase, the roots that grow out will become smaller, and the yield will decrease significantly. Under normal circumstances, the ratio of large and small roots is (6-8): (4-2), which varies with cultivation and management measures. Roots should be stored with “ribsâ€, and two “ribs†should be left on the roots of the small roots of the “seedsâ€, separated to the left and right, each 2-3 cm long, and the roots of “seeds†that do not leave “ribs†will not grow easily after sowing. The "ribs" must be cut well before the year and cannot be cut along with the species. After the excavation, the citrons were collected and buried. When the hole is hidden, the selected soil is not easy to freeze and the well-drained highland is digged for storage. When storing, put a layer of citrons (with ribs) and then spread a layer of loose fine soil. The top layer should put some dry fresh straw, and then cover it with loose fine mud. When the number of citrons is small, they can also be piled up indoors. The place to be piled up should be muddy. The method is similar to burrowing. China Agricultural Network Editor