What are the latest kiwifruit deficiency?

Kiwi fruit is also called kiwi fruit, in our country is a more popular fruit. Therefore, there are many people planting kiwifruit now. When planting kiwifruit, we should pay attention to fertilizing. meet the growth needs of kiwifruit growth nutrition. However, many people will ignore the application of trace elements, resulting in deficiency of kiwifruit during growth, affecting the yield and quality of kiwifruit. So what are the symptoms of kiwi deficiency? Let's take a look below!

1. Calcium deficiency

Calcium is an important element in plant cell wall, which can improve photosynthesis of kiwifruit trees. Reasonable calcium element can prolong the senescence time of kiwifruit, enhance the hardness and storability of kiwifruit. If kiwifruit is calcium deficient, the color of the basal veins of mature leaves begins to fade and gradually necroses, forming necrotic patches. Then gradually appear dead leaves, falling leaves phenomenon, causing the death of branches. In severe cases, it will affect the growth of roots and cause root tip death. To prevent calcium deficiency, appropriate amounts of calcium superphosphate and calcium nitrate should be applied to the soil.

2. Magnesium deficiency

Magnesium is also important for kiwi growth. It regulates photosynthesis and hydration of plants. Reasonable magnesium can promote fruit expansion and improve fruit quality. Magnesium deficiency is common in kiwifruit cultivation. Generally, it will appear on the mature leaves of the current year, and the color of the veins and leaf margins will gradually turn yellow-green. However, there is not much influence from base to petiole, and the reasonable magnesium content of leaves should be about 0.4%. If the magnesium content in the new leaves is less than 0.1%, it will lead to chlorosis and necrosis of the leaves, forming horseshoe-shaped leaves.

3. Sulfur deficiency

Sulfur is also an indispensable nutrient in the growth process of kiwifruit trees. It is mainly composed of amino acids and enzymes, and has a very close relationship with carbohydrates, fats, proteins and other nutrients in kiwifruit trees. If kiwifruit is deficient in sulfur, the growth rate will decrease obviously, the color of young leaves will be light green, and the chlorotic patches will gradually expand. In severe cases, the tender leaf vein network will all appear chlorosis, and the vein will also appear chlorosis, but the leaf margin will not be scorched. If there is a lack of sulfur, then appropriate amounts of ammonium sulfate, potassium sulfate and other fertilizers can be sprayed to supplement.

4. Chlorine deficiency

Chlorine, like magnesium, is closely related to photosynthesis and hydration in kiwifruit trees. Kiwifruit trees are sensitive to the change of chlorine content. Chlorine deficiency causes chlorosis in the main lateral veins at the top of old leaves. The old leaves appear leaf roll, reverse roll phenomenon, the area of young leaves decreases, root growth rate decreases. About three centimeters from the root end, it will swell, mainly because rain washes chlorine away and causes chlorine deficiency. If chlorine deficiency occurs, potassium chloride and other fertilizers should be properly applied.

The above is a brief introduction to what kiwifruit deficiency has. In addition to the above, there are manganese boron zinc copper sodium and other elements will appear deficiency syndrome. Therefore, everyone must pay more attention.