What are the nutrient deficiency symptoms in yardlong beans? Analysis of the latest identification points

Yardlong beans are a vining vegetable plant that everyone is very familiar with. Its planting area in our country is also very large. When growing yardlong beans, fertilization work is very important. Reasonable fertilization can supplement various nutrient elements for yardlong beans, thereby improving the yield and quality of yardlong beans. However, if nutrient elements are insufficient, then yardlong beans will show various deficiency symptoms. So what are the nutrient deficiency symptoms of yardlong beans? Let's take a look below!

1. Nitrogen deficiency

If yardlong beans lack nitrogen, the main symptoms will appear at the base of the yardlong bean plant, and the leaves at the base begin to turn yellow. The newly grown leaves are small and thin, with a dull color. The plant will also gradually become shorter, the stems thin and weak, and the number of branches will also decrease. A large number of flowers and pods drop, the growth rate of yardlong beans will also drop significantly, and a large number of deformed pods appear. The plant's stress resistance will also become worse, and the disease incidence rate is relatively high.

2. Phosphorus deficiency

If yardlong beans lack phosphorus during growth, then the growth rate of the yardlong bean plant will drop significantly. Similar to nitrogen deficiency symptoms, the stems become very thin and weak, and the number of branches is small or there is even no branching. Root development is seriously affected, with few new roots and very poor growth capacity. Although the leaf color will deepen, it becomes lusterless, the petioles fade to purple, and leaf drop is very likely to occur.

3. Potassium deficiency

During the growth of yardlong beans, if potassium is lacking, then the old leaves at the base of the plant and their edges begin to turn yellow. Moreover, the leaves will begin to show drying, and the color gradually turns brown, but the area around the veins and the middle of the leaves remains green. If potassium deficiency is severe, then a large number of leaves in the middle and upper parts of the plant will show dry tips and dry edges. The stems become thin and long, very prone to lodging, and pod development is seriously poor. Cold resistance and drought resistance are poor, premature senescence is likely, and yield is low.

4. Calcium deficiency

If yardlong bean pods lack calcium, then cell division within the plant will be affected, causing the growth and development of root tips and stem tips to be inhibited. The plant's growth rate drops, and the new upper leaves begin to change, usually their shape also begins to change. Leaf tips and leaf edges begin to necrose from the outside inward, the terminal bud grows obviously poorly, and in severe cases it leads to rotting and death, and similar situations are also likely to occur at root tips.

5. Boron deficiency

If yardlong beans lack boron, the symptoms will first appear on the plant's heart leaves, flowers, and fruits. In the early stage of boron deficiency, the newly sprouted branches and top shoots stop growing, and new leaves show deformities, shrinkage, and similar phenomena. Irregular chlorotic patches also appear between the leaf veins. The old leaves at the lower part of the plant begin to thicken, and the leaves and stems also become brittle and very easy to break. When boron deficiency is severe, the growth points of both the roots and the aboveground parts begin to necrose, the number of flowers and fruits decreases significantly, and phenomena such as few dropped flowers and flowers without fruit appear.

The above is a brief introduction to what the nutrient deficiency symptoms of yardlong beans are. In addition, elements such as magnesium, copper, and iron are also needed for the growth of yardlong beans, so everyone should pay more attention. That is all for today's introduction. This article is for reference only, and I hope it can help everyone!