Because of its large fruit, good quality and storage resistance, Sha Tin grapefruit is deeply loved by consumers and has great development prospects. However, some growers have applied a large number of chemical fertilizers and pesticides due to excessive pursuit of high yields, resulting in a significant decline in fruit quality. How should Shatin grapefruit be managed?
(Source: Network)
<h1 class="pgc-h-decimal" data-index="01" > garden selection </h1>
If you want Sha tin grapefruit to be high-yielding and high-quality, you must choose a good plantation land in the early stage. Garden land with loose soil and rich organic matter should be selected for planting. At the same time, there should be sufficient water sources near the garden to facilitate watering and build a drainage system.
<h1 class="pgc-h-decimal" data-index="02" > reasonable fertilization</h1>
After Sha tin grapefruit enters the fruiting period, with the increase of fruit volume, fertilizer demand also increases accordingly, and doing a good job of scientific fertilization is the key to improving the fruit rate of Shatin grapefruit. Fertilization should be based on phosphorus, potassium or organic fertilizer, topdressing should also be based on the size of the tree age and the number of results to determine the amount of fertilizer, the general plant yield 50kg of Sha tin grapefruit fruit tree, application of N1.5kg, P2O5 0.6kg, K2O 0.75kg.
When applying winter fertilizer, Shengli Shenguang 15-15-15 balanced special fertilizer can be applied 3-5 kg/plant + Yala- Youyi bacteria bio-organic fertilizer 20 kg + Red Bull Weimei fertilizer 2-4 kg + phosphate fertilizer;
▲The leaves of Sha tin grapefruit in the control group were smaller and the leaf color was yellower; the leaves of Shatian grapefruit with Shengli Shenguang special fertilizer were large, thick green and shiny
Zhuangguo fertilizer is recommended to apply Victory Shenguang 15-15-15 balanced special fertilizer 2-3 kg / plant + Red Bull Weimei Crops 1-2 kg / plant + Red Bull Weimei Fertilizer 2-3 kg / plant.
▲The Sha tin grapefruit fruit with the special fertilizer of Victory God Light is well-shaped, and the amount of fruit hanging in the first year is also very large
<h1 class="pgc-h-decimal" data-index="03" > moisture management</h1>
Sha Tin grapefruit likes water, the water demand in the entire growth cycle is larger, the soil should be kept moist, should follow the principle of "wet but not waterlogged, dry and not dry", but the specific situation should also be based on the growth of Sha Tin grapefruit. For example, when the grapefruit buds in Sha tin are differentiated, the demand for water is small, and the soil moisture content should not be too much, about 22%. And after the autumn shoots gradually turn green, it is also necessary to gradually reduce the water, promote the growth of autumn shoots, and improve the nutrient accumulation in the tree body. Improve the flowering and fruiting rate of Sha Tin grapefruit, promote pollination and fruit hanging, and increase yield. In order to make the fruit resistant to storage, it should not be watered for 20 days before harvesting. At the same time, Sha Tin grapefruit likes water to be waterlogged, so it is also necessary to drain water in time when the orchard is too much water.
<h1 class="pgc-h-decimal" data-index="04" > trimming</h1>
The main purpose of the pruning work is to improve the tree-shaped structure of shatin grapefruit, and the pruning object is also the result of the mother branch of Sha tin grapefruit. In order to promote the growth of the fruiting mother branches and improve the flowering and fruiting rate of Sha tin grapefruit, we must cut off the external branches that are too dense and too long. Retain some horizontal and drooping branches to promote the growth of inner branches and prevent over-dense foliage and reduce the permeability of fruit trees. In the summer, the method of plucking and spreading should be used to control the growth of branches, adjust the growth focus of Sha tin grapefruit, and ensure adequate yield.
<h1 class="pgc-h-decimal" data-index="05" > pest control</h1>
There are many diseases and insect pests of Sha tin grapefruit, common diseases are foot rot, black star disease, anthrax, insect pests include red spiders, arrow-tip aphids, leaf-diving moths, aphids and so on. For the prevention and control of diseases and insect pests, it is necessary to comprehensively use ecological regulation, physical control, biological control and other measures to ensure their yield and quality. After the winter fruit picking, it is necessary to plough the soil in time, prune the branches and leaves, reduce the source of diseases and insects, strengthen fertilizer management, increase the application of phosphorus and potassium fertilizer, improve the disease resistance of the plant, and deal with the disease and insect pests in time.
bibliography:
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