The latest topping time of sesame and matters needing attention

Sesame is an important economic crop in China, which is planted widely. In order to increase the yield, sesame is often topped. The common crops that need topping are tomato, cotton, tobacco and so on. So does sesame need to be topped? When should I hit the top? Let's get to know it.

1. Topping effect of sesame

The leaves of sesame are hypertrophy in the early stage and change from heart-shaped to lanceolate in the later stage, which will consume nutrients under photosynthesis and have a certain impact on the seed setting rate and quality of sesame, so proper topping is needed. Improving topping can optimize the growth environment of sesame, regulate the nutrient distribution of plants, reduce the ineffective digestion of nutrients, and promote the reproductive growth of sesame. Prolonging the photosynthesis of leaves can improve the seed setting rate and the fullness of grains, and the effect of increasing yield and quality is obvious.

2. Topping time of sesame

The topping time of sesame must be mastered well. Topping too early will reduce the number of capsules and photosynthetic leaves, while topping too late will not achieve the purpose of regulating nutrients, resulting in an increase in the number of ineffective capsules. Generally, the topping time is 60 days, and the best time is 25-30 days, that is, three weeks after the first flowering, and the specific time depends on the variety, season and climatic conditions. Generally, autumn varieties can top 24 days after flowering. Summer cultivation is generally 25-30 days after the first flowering.

3. Matters needing attention in topping

Although sesame can be topped, it is forbidden to beat leaves. Farmers in some sesame growing areas will pick sesame leaves for use, which will reduce sesame production by about 20% and 30%. For the functional leaves in the capsule-forming part after the first flowering, the transport and distribution of the photosynthetic products of sesame will be the most like the lateral capsule, followed by the lateral, and the lateral is very few. Therefore, the sesame after leafing will lead to a decrease in the plumpness of the capsule and poor quality, so it is forbidden to beat leaves.

4. Plant growth regulators

When crops are planted, in order to ensure the yield. Some plant growth regulators will be used, such as cotton topping flurenamine, sesame seeds can also use clenbuterol, triiodobenzoic acid and so on, which can effectively increase yield and reduce blighted grain rate. however, the multi-frustration used in crop production has no effect on increasing the yield of sesame and can not replace topping.

The above is the introduction of sesame topping time and matters needing attention. I hope it can help you. If you want to know more about it, please follow us.