Precautions for applying rooting agent

Pay attention to the following points in the application of rooting agents :

1. Pay attention to the concentration of the drug and the site of application

The preparation method and concentration of the agent, the number of times of administration, and the site of application must be strictly controlled during administration. If you use 2.4-DD to prevent tomato from falling, you can only treat the flowers, not the whole plant or apply to the young shoots and young leaves, otherwise it will cause phytotoxicity.

2. Master the application period

The period of application depends mainly on the stage of development of the plant and the purpose of the application. If the female flower formation of pumpkin is induced by ethephon, it must be sprayed in the fine seedling stage with 4-6 leaves. If it is applied too late, the sex of the early flower has been determined, and the purpose of inducing female flowers is not achieved. Application of plant growth transfer agents should be carried out on cloudy days or in the morning and evening.

3. Must be combined with cultivation measures

Plant growth regulators are not a substitute for fertilization and must be combined with reasonable cultivation practices. If the cucumber is treated with ethephon, the cucumber can open more female flowers and more melons, but when the conditions such as fertilizer and water are insufficient, the cucumber type is small, the fruit setting rate is low, and high yield cannot be obtained.

4. The method of applying fertilizer in the colonization hole is commonly referred to as “the nest in the nest”. In this way, fertilization is more concentrated and fertilizer utilization is high. Especially for the sheds where soil deterioration and soil-borne diseases are serious, "women in the nest" is an effective method of fertilization. However, in an interview with the countryside, the author learned that a lot of shed vegetables had been burned due to "burning in the nest". why? The reason is very simple, that is, the concentration of fertilizer in the planting hole is too large, the root system can not be absorbed evenly, resulting in poisoning and burning roots. If further investigation is carried out, it should be caused by improper fertilization methods.

Therefore, the author reminds the vegetable farmers that the fertilizer must be cautious. Under normal circumstances, the hole depth is about 5-10 cm, and the soil is covered after fertilization. In order to avoid the fertilizer with high concentration in the hole hurting the root of the crop, the organic fertilizer applied at the hole must be fully decomposed in advance, and the fertilizer and biological fertilizer must be mastered. Further, fertilizers containing too much nitrogen such as urea or ammonium hydrogencarbonate are not suitable for use. Because such fertilizers are more irritating to vegetable roots, and the demand is small. Therefore, it is best to use fertilizers such as soybean meal organic fertilizer, biological fertilizer, humic acid and amino acid fertilizers. These fertilizers not only contain nutrients but also are not easy to burn roots. Generally, it is better to apply about 30 grams in the colonization hole.

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