Scientifically select plant growth regulator on vegetables
As plant growth regulator has many varieties and different effects, many vegetable growers feel it is difficult to grasp. However, this problem will be easy to solve if we consider the application of this kind of product according to different vegetable growth states.
Vegetable that grows excessively will have large leaves and grow fast as well as have small and tender stem, will be difficult to bloom and have serious blossom drop and fruit drop. Usually the fruit will grow slowing after setting, thus will lead to low yield and poor quality, which can be called excessive vegetative growth and weak reproductive growth in phytophysiology.
Regarding the vegetable that have the above state, except for appropriately increasing the use of phosphatic fertilizer and potash fertilizer, reducing the use of nitrogenous fertilizer as well as controlling the watering frequency, it is very important to use growth regulator so as to inhibit the excessive growth, adjust vegetative growth to reproductive growth, alleviate vegetable growth state, increase the flower quantity, improve fruit setting rate, accelerate the fruit growth and reach a new balance of vegetative growth and reproductive growth.
Regarding the vegetables that have excessive reproduction, drug that can inhibit the growth should be used, which is generally called inhibitor. The commonly used inhibitors include chlormequat chloride, mepiquat chloride, ethephon, diniconazole, triadimefon, paclobutrazol, succinamic acid, abscisic acid and so on. These kinds of pesticides should be used in the appropriate time, this is because when they are used too early, the plant will appear to be small, the leaf area index will be small and it will become dwarf plant, even it can bear fruit, the yield must be very low; if the pesticide is used too late, the excessive growth has been already settled and is unlikely to be changed, besides, it will take time to inhibit and transform, which will also lead to low yield and lose partial high yield time. Therefore, inhibitor should be used carefully in the seedling time and the drug concentration should be reduced accordingly. It should be used in the initial stage of excessive growth and observe the development and change after using it one time instead of urgently using it for the second time.
Vegetable that grows weakly, of which the dendrite will grow slowly. Although it will be easy to bloom and bear many fruits, the fruit size will be usually small, the quality will be very poor, or the fruit setting rate will be very low, which often lead to low yield and poor quality. This phenomenon can be called excessive reproductive growth and insufficient vegetative growth in phytophysiology.
Regarding the vegetable that grow weakly, except for increasing the use of nitrogenous fertilizer and provide enough fertilizer, it is very important to use plant growth regulator so as to improve vegetative growth level, inhibit excessive reproductive growth, adjust reproductive growth to vegetative growth, enhance the vegetable dendrite growth, get rid of weak state, thus the fruit setting rate will be improved, fruit will in turn increase the photosynthate supply as the leaf and branch growth is improved, the fruit growth will accelerate and reach a new balance of reproductive growth and vegetative growth.
Regarding the vegetable that grows weakly, plant growth regulator that can promote the growth should be used, which is generally called accelerant. It mainly includes auxin, gibberellin, cytokinin and so on.