Long beans grow to 1.8 m but produce no pods: the problem lies in the fertilizer

Beans are a vegetable commonly eaten in our homes, and the market price is quite good too, so many regions choose to grow beans. But if the beans sprawl to 1.8 m and still do not grow pods, that can only mean one thing: excessive vegetative growth! Spindly overgrowth has occurred. In other words, the amount of nitrogen fertilizer used is somewhat too high, while the amount of phosphorus and potassium used seems somewhat insufficient.

Vegetative growth and reproductive growth are very necessary for plant growth and development. For vegetable growing, the part harvested differs, and the fertilization strategy chosen will also differ. Take water spinach, for example: this vegetable is harvested for its above-ground stems and leaves, not for the fruit it sets after flowering. In this case, we want it even more to carry out more vegetative growth rather than reproductive growth, so in this situation fertilization should lean more toward vegetative growth.

For crops harvested for their fruit, such as cucumber, watermelon, beans, tomato and other crops, when they are about to enter the flowering stage, which is also the stage when vegetative growth transitions to reproductive growth, the topdressing at this time needs to lean toward reproductive growth.

As for the fertilizer requirements of crops during reproductive growth and vegetative growth, related introductions have been given in previous articles. During the vegetative growth stage, the plant grows very fast, cells rapidly synthesize and multiply, mainly shown in leaf development and thick sturdy stems and so on; at this time a large amount of nitrogen fertilizer is needed to ensure that growth is completed.

The reproductive growth stage is different: at this time fruit development is dominant, and the accumulation and storage of sugars and other nutrients in the organism require large amounts of potassium; in addition, this is also the stage of massive synthesis of nucleic acids and glycosides, requiring large amounts of phosphorus to ensure supply.

Therefore, since the fertilizer requirements differ between these two stages, the fertilization strategies are naturally different as well. However, if after entering the reproductive growth stage the nitrogen supply is too much, it will cause the plant to sprawl, and leaves will grow without flowering; this phenomenon is very common in home garden flower growing. For friends who encounter this phenomenon, potassium dihydrogen phosphate can be supplied in time to adjust the balance of the plant's fertilizer needs, and nitrogen fertilizer should as far as possible no longer be added.

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