Kiwifruit is good for early fertilization in autumn


One of the main fruit growing cycle period, the general rules of post-harvest fruit consumption in most nutrients, accounting for 50% of the entire cycle takes fertilizer, applied immediately after the consequent fruit picking fruit picking fertilizer, fruit tree growing relationship between the yield and quality. In our survey of existing fruit trees, there are many drawbacks did not do this, the majority of farmers, should change the concept, to make a scientific fertilization, according to the law of kiwi growing need fertilizer, so fertilizer, especially post-harvest fruit in autumn, should Do fertilize early.

The benefits of early fertilization

   1. Growth Law branches kiwi fruit picking is stopped after the growth of roots into the growth stage, together with the fruit picking consume more nutrients, root absorption need to replenish the supply, to meet this requirement, but also to meet the nutritional supply of the stage; 2. This The first stage is also root growth, suitable for ground temperature. The soil temperature required for root growth of kiwifruit is 20-25 °C. At 29 ° C, the root system begins to stop growing again. After harvesting, the soil temperature is about 20 °C, which is sufficient for root growth. In order to absorb nutrients in a large amount; 3. When the temperature is low in autumn, the branches have stopped growing, and the absorbed nutrients can exist in the roots and branches for spring growth; 4. The difference between kiwi and other fruit trees, flower bud differentiation occurs in spring. One month is complete, in view of the large amount of nutrients required for flower buds and flower buds, at this time, due to the low soil temperature, the roots are less absorbed, and the nutrient supply in the branches is present after the fertilization in autumn ; 5. After the early autumn fertilization, it is a part of the root system, which is suitable. The soil temperature heals quickly, and new roots are grown. The nutrients applied are absorbed efficiently and the nutrient is improved.

Second, the shortcomings of fertilization too late

   1. The rate of root absorption is very low when fertilization is too late. When the temperature is low, the temperature required for root activity is not reached. 2. When rooting is applied, some roots are damaged. Because the soil temperature is low, it is difficult to heal and grow new roots. absorption, on the fertilizer needed for next year is not on; 3 to winter root growth has stopped, the applied fertilizer slowly play a role, has missed the differentiation, nutrient supply needed for germination; 4. Since no decomposition bulk fertilizer Utilization, it will also poison the root system, especially chicken manure is more likely to produce poison; 5. Kiwifruit produces new root temperature is not enough, the root system is less and the absorption rate is reduced; 6. When the soil temperature is too low, the root system is dug during the fertilization and is frozen. It has been determined that new roots are subject to damage when the soil temperature is 4 °C.

Third, when harvesting fruit and fat

Kiwi divided into two categories from the mature, Actinidia chinensis varieties such as red sun, Hua You, late red, red Chu, big Ye Hongyang and other varieties, usually in mid-September to late gradually mature, Actinidia class as Qinmei, Haiwa De, Xuxiang, Jinxiang and other mature late, generally harvested in mid- October , the harvest time determines the fertilization time. For China to promote kiwifruit varieties in late September-October fruit picking fertilizer applied early, Actinidia is advocated for fertilization in late October before the mid -11 is more appropriate. Under too much rain this year, the harvest by a certain influence, can be pushed back a little, but not more than 11 months, the soil temperature drops to December, the snow may appear, should not be the root fertilization.

Fourth, the application of fertilizer is good

According to the low content of organic matter in the soil of kiwifruit production area, most of them are between 0.8-1.2% . Recently, the organic matter content is 0.4% , which is very low. Such soil can not grow good fruit, to improve the organic matter content, more organic fertilizer, given that fertilizers for many years to master, kiwi Park severe soil compaction, increase the content of harmful substances, such as inorganic salts, and fertilizer should be added Shi Youyi A variety of medium and trace element fertilizers. Fertilization principle, formulating fertilization, mainly based on 100 kg of fresh fruit, 100 kg of organic fertilizer, nitrogen 2.2-2.8% , phosphorus 0.18-0.22% , potassium 2-2.3% , calcium 3.0-3.5% , magnesium 0.38 % boron 40-50 mg / kg dry matter, iron is not less than 60 mg / kg of dry matter. Manganese 30 mg / kg dry matter, zinc is 15-18 mg / kg dry matter, sulfur is 0.25-0.45%, etc., when the content is higher than when it is poisoned, when it is less than the case of deficiency, according to this standard for formula fertilization Suitable for kiwifruit needs. But also to determine the amount of fertilizer based on soil fertility status and vigor and production predictable.

The formula should be organic fertilizer + bacterial fertilizer + medium and trace element fertilizer and sulfur-based compound fertilizer.

The formula should be organic fertilizer + bacterial fertilizer + medium and trace element fertilizer and sulfur-based compound fertilizer.

In recent years the test, take this formula has produced very effective results, and in the soil physical and chemical changes, good crumb structure, porosity, specific see earthworm breeding capacity, the more earthworms, the more loose soil, macaque peach roots absorb significantly expanded, The absorption is increased, the tree body is strong, and the yellowing disease and ulcer disease are relatively reduced.

Based on the results of fertilization over the past few years, the following formula is recommended and applied immediately after fruit picking. After the decomposition of organic fertilizer cow dung, a fuel slag when producing fruit sheep, chicken, applying conditions 40 kg + 40 kg organic fertilizer pure soil fertilizer Mumei a good 1.5-2 kg + thio-type Dimitrios Compound fertilizer 0.5-1 kg + mineral trace elements Fertilizer 0.25-0.5 kg. Applied to the selected organic or inorganic fertilizer Tappi TRIPLE a fertile field A + 1.5 kg 0.25-0.5 kg After complete mixing. These two formulations have clearly seen the effect in production. A single chemical fertilizer is used in limited quantities in the production of fresh virgin kiwifruit. Of ammonium nitrate in water or organic raw urinary allowed to use in accordance with the standard kiwi pollution.

For young trees that have just been fruited or not fruited, depending on the size of the tree, a proper amount of fat should be applied. This will achieve full nutrition and fertilization.

Fifth, the fertilization method should be changed

   1. The crown has canopy, mixing good formula fertilizer applicator whole park to 20 cm deep plowing disking. Do not apply around the main pole.

   2. The unconstrained tree can be opened in the open channel, the annular groove and the ditch outside the capillary root, and the mixed fertilizer is applied to cover the topsoil.

No matter which method is applied, the soil moisture is insufficient to pour water in time, and when the sensation is good, it will not be watered.

In the early autumn fertilization, the amount of fertilizer should be determined according to the type and composition of the fertilizer, soil conditions and yield. The above ratio can be used as reference. When applied, the amount of various fertilizers can be converted and the formula can be fertilized reasonably.  

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