Good longan results show that the parent shoots should have a thickness of 0.8 cm or more and possess at least 15 compound leaves. Before flower bud differentiation, the leaves must turn green and mature, then stop growing (enter dormancy) to accumulate sufficient nutrients. Based on this, the following management practices are recommended in cultivation:
First, timely tip pruning is essential. After harvesting, cut back the fruit-bearing and fruit-dropping branches from the top of the gourd section, keeping the gourd intact. Then remove inner-lid branches, thin or weak branches, overly dense branches, dead branches, and diseased or insect-infested ones, cutting them off at the base to ensure an open and well-ventilated canopy.
Second, timely shoot fertilization is crucial. For trees with heavy fruiting, old trees, or weak growth, apply one shoot in mid to late September. For trees with little or no fruit, two shoots are recommended: the first in late August and the second in early October. Apply fertilizer one week before each shoot, mainly using nitrogen, along with phosphorus and potassium. For example, use 50 kg of urea, applying 4–5 kg per tree, and 2–3 kg of compound fertilizer. The shoot fertilizer should be applied when the new shoots reach 5–10 cm in length, focusing on phosphorus and potassium with some nitrogen. Apply 4 kg of compound fertilizer per 100 kg of fruit, and mix 2–3 kg of cooked peanut bran. Also, apply 1 kg of phosphate and potash fertilizer per tree. Each application should be accompanied by 2–3 liters of manure water. Dig a ring-shaped ditch or 4–6 trenches under the canopy and apply the fertilizer to the soil.
Third, timely thinning is important. When new shoots grow to 3–5 cm, select the best ones to keep. Usually, leave three new shoots on each main branch, and one to two medium or weak branches. Remove all others. Ensure the remaining shoots grow uniformly in the direction of space expansion.
Fourth, foliar feeding after pruning is beneficial. After pruning, spray 1–2 times with a solution diluted 1000–1500 times to promote neat shoot growth. During shoot development, spray a mixture of 0.3% urea, 0.2% potassium dihydrogen phosphate, 0.2% magnesium sulfate, and zinc sulfate every 7–10 days. Once the leaves turn green, apply foliar fertilizer to enhance nutrition, promote thick, dark green leaves, and full branches.
Fifth, soil mulching helps improve root health. Longan roots thrive in well-aerated, loose soil. After fruit harvest, loosen the topsoil around the tree, then spread a 3–5 cm layer of mud over it, followed by 5–10 cm of straw or other organic material. Sprinkle a small amount of lime powder to prevent pest and disease infestation.
Sixth, pest control is necessary. Common pests affecting longan shoots include beetles, hibiscus, and moth tips. Begin spraying when new shoots appear, combining it with top dressing. Use 1000 times diluted An Lvbao mixed with 800 times trichlorfon, or 1500–2000 times diluted Kung Fu, or chrysanthemum-based pesticides. Spray every 7–10 days for 2–3 applications to effectively control pests.
Infusion set,Disposable Syringe,Insulin Syringe,gauze roll,Cotton roll,Sterile Urine cup
FOSHAN PHARMA CO., LTD. , https://www.forepharm.com