Hainan anti-season longan control technology
Since Professor Yan Changrui of Taiwan developed a special product for longan flower special fertilizer, Taiwan, Guangdong, Guangxi, Fujian and other places have set off an upsurge of anti-season cultivation of longan. In recent years, Hainan has also promoted the trial cultivation of Chuliang and Dendrobium varieties in the off-season cultivation. However, due to the lack of comprehensive understanding of this technology by many farmers, especially the control of flowering, the flowering effect is not obvious. Affected output and benefits. For this reason, the author carried out a large number of investigations and studies and believed that only by combining the traditional method of controlling flowering and the special fertilizer for longan to promote organic cultivation of longan can be successfully carried out. 1 Traditional control measures 1.1 Cultivate appropriate and robust results. The flowering at any stage of the mother tree and longan must be established on the basis of the last time the fruit was harvested and then cultivated to have a sturdy and robust result with 2 to 3 shoots in order to ensure sufficient functionality. The leaves maintain the normal development of the flowers, otherwise there may not be yield even if the flowers are successful. 1.2 Appropriate sparsely cut off the anti-season longan. Before the control of the shoot, it should be properly cut once, that is, the dense branches, the weak branches, the dead branches, the pests and branches, etc. should be removed to improve the ventilation and light transmission conditions of the tree and increase the net photosynthetic efficiency. Thereby increasing the nutrient accumulation of the tree is conducive to flower bud differentiation. 1.3 The chemical control tip is about 45 days before the expected flowering spike, that is, after the last tip of the mother shoot turns green, spray control tip is started, generally divided into 3 times, each time for 7 days. Specifically, the first use of 8g ethephon plus 50g paclobutrazol water 15kg spray; the second with 10g ethephon plus 100g paclobutrazol water 15kg spray; the third with 0.5% potassium dihydrogen phosphate modified or compound nucleotide plus 100g Paclobutrazol water 15kg spray. The number of use of control shoots was increased or decreased due to changes in shoot tip shoots. 1.4 Appropriate control of water During control of the tip, if there is too much rain, the water should be digged deep in the outer edge of the dripping line and a width of 30cm in the annular groove should be used for water control. Care should be taken not to break the root or expose the fine root; Within a range of 50cm, open the soil layer to expose a large root to strengthen water control, and then cover the soil when the leaves lose water. 1.5 Circumcision Circumcision For the prosperous tree, the main branch is to be circumcised or spirally girdled (with a width of 0.3 cm) in the end of the control period before applying the longan special fertilizer for flower promotion. 2 Application of longan flower special fertilizer 2.1 Soil Application 2.1.1 The application time is generally from 2 to 9 months in Hainan. The application of anti-seasonal flowers can be applied. Specifically, after the third chemical control tip is sprayed, the special long-term application of special fertilizer is applied. After about 25 days, the fertilizer can be used. Pull out flower spikes. 2.1.2 Application amount The application amount of the special fertilizer for producing longan is usually high. It is known that the application amount of most canopies per meter is as high as 300-500g. According to the author's experience, as long as the tree vigor is robust and the conventional control tips are used, a 100 g dose (normal production family) of rice crown diameter can achieve good flowering effect. 2.1.3 Application method Grasp the following points: (1) Clean the weeds and leaves in the tree tray before spraying; (2) Dig deep in the crown water dredge at a depth of 10 to 15cm within 20cm. Ditch or shallow loose soil from the soil layer 50cm to the dripping line from the tree head, so as not to hurt the root; (3) Scatter the agent evenly in the ditch and loose soil and mix with the soil, or first The agent is dissolved in 10-15k**** and then showered in the ditch and loose soil layer. (4) Cover soil, cover grass, and pour water. After drought, pour water once every 5 days and moisturize for about 25 days. 2.2 Leaf Spray Practice has proved that the application of longan special fertilizer for flower promotion can be better if the combination of soil application and foliar spraying is adopted. Specifically, 7 days after the application of the agent, 1% to 2% of the drug solution is sprayed on the leaves and shoot tip shoots, and the leaves are usually sprayed 1 to 2 times with an interval of 7 to 10 days. Note that the root soil should also be kept moist after spraying to ensure that the inflorescence is successfully formed and extracted. Food Additive,Common Food Additives,Natural Food Additives,Food Additives And Preservatives Guangzhou ZIO Chemical Co.,Ltd. , https://www.ziofoodchemical.com