Wen Dan on fire
Wen Dan grapefruit and oranges eat as much on fire, so moderation. For people who have constipation or fire symptoms should pay attention to eat less or not eat the best.
The pomelo planting environmental conditions
1, cultivation environment
The pomelo and the good high temperature and less cold hardy, in 27-32 ℃ when the development of the best, cultivation sites to choose the sunshine, south or southeast of the slope to the best, pay attention to avoid the winter winds and summer and fall typhoon damage. Pomelo in a variety of soils can be cultivated, but shallow and barren sand, can be early results, lower yields; in the deep, fertile clay soil, it is slower to results, higher yields, fruit skin thicker, poorer flavor; deep soil, well-drained, rich in organic matter loam is ideal. Soil reaction to slightly acidic to neutral is more suitable, too acidic soil with lime or dolomite powder to improve; alkaline soil will cause physiological disorders, but also not easy to improve, is not suitable for Wendan cultivation. The water table is too high, poor drainage, easy to rot the roots, causing disease, is also not suitable for cultivation.
In the typhoon rainy season, attention should be paid to drainage, plant development and fruit hypertrophy encountered in the pre-drought, it is necessary to irrigate, flat ground available surface irrigation, sloping land applicable sprinkler irrigation, water is insufficient to use drip irrigation. The implementation of grass cultivation, that is, let the soil surface natural growth of low grass or artificial planting of bahiagrass and other fine grasses, the formation of cover. Soil erosion can be avoided, in the high temperature dry season cut grass cover, but also reduce water evaporation and regulate the ground temperature, cut grass and underground grass roots after decay, but also increase soil organic matter, fruit tree growth is extremely favorable, for a labor-saving, high efficiency orchard management method.
2, seedling propagation and selection
Wendan available two-year bitter grapefruit or sour grapefruit seedlings as rootstock, before and after the spring cut propagation; can also be in March, April, select the diameter of 2-3 cm thick appropriate branches for high-pressure propagation, that is, in the lower end of the branch circular peeling of about 3 cm to 200 mg / l naiacetic acid (NAA) or indole butyric acid (IBA) after treatment. With transparent plastic cloth filled with wet water moss or mixed with rotted compost clay loam parcel, add water to maintain the temperature at the right time, after a period of time, that is, by peeling at the upper end of the root, half a year after the root stock is well developed, cut off the false planting in the seedbed, and then 3 months or the following year, planting in the early spring. High-pressure method of propagation of seedlings with more fine roots, but also more mature, after planting can reach the fruiting age earlier.
3, cultivation management
Wendan to November to the following February before the sprouting is appropriate, the way to the triangle can make full use of the space, sunlight exposure is uniform, fertile soil on the level ground rows of plants distance of 8-9 meters, barren slopes tree shape is small, 6-7 meters can be. Planting before the planting hole should be dug moderately large, wide and deep to more than 1 meter, the lower layer into the composite fertilizer or decomposed compost, add soil mix moderately compacted, the seedlings will stand on top, then add soil compaction, planting depth should be shallower than the nursery, the root base of the surrounding slightly piled up, irrigation so that the roots and the soil close to the top of the straw to keep it moist, if the seedling will be shaken, to set up a pillar to be fixed.
Yuhuan Wen Dan planting
4, pruning, pruning, fruit thinning bag
Wen Dan pomelo young tree early single stem pruning, cut off the basal branches, from the ground 60-80 cm or so to stay in 3-4 evenly spaced, azimuthal distribution of the average, well-developed branches to do as the main branch, so that it is to the surrounding evenly spread, the formation of a good canopy. In the first few years, remove all the flowers to promote the development of the tree, and let it bear fruit from the fourth year onwards. As the weight of the fruit pulls the branches downward, the crown can be opened up to form a semicircle. Pruning after the formation of the crown, is to reduce the useless branches consume nutrients, and increase sunlight transmission, promote the flower bud differentiation of the branches inside the crown, improve the yield and quality of fruit, pruning once a year in November-December, cut off the staggered, whorled, over-dense, thin and weak branches, and in addition to find the growth of unbalanced growth of the elongated branches, pests and diseases branches, at any time to be cut off.
The discovery of deformities or pests and diseases of the fruit should be removed at any time, the results are too dense, the fruit should be thinned when the fruit develops to the size of the egg, and then to the bag, the bag can prevent the rust ticks, fruit fly pests, reduce the use of pesticides, while the bag of humidity increases, some of the sun's rays are filtered, so that the fruit of the smooth skin of the mandarin, the color is more vibrant and moving, and get the consumer love.
Tips for choosing grapefruit
1. Choose the tip not to choose round, the more pointed the better.
2. Choose big, choose small, big head ripe will be better.
3. Choose yellow, not green, yellow is earlier than green ripe.
4. Choose heavy rather than light, heavy fruit is fuller.
5. Pick the grapefruit with a finger to press the bottom, press the best.