Sesame topping time and precautions

Sesame is an important cash crop in our country. It is planted widely. In order to increase yield, it is often topped. The crops that need topping are tomato, cotton, tobacco and so on. So does sesame need topping? When is the topping good? Let's get to know each other.

1. Sesame topping effect

Sesame leaves hypertrophy early, late leaves from the heart into lanceolate, in photosynthesis will consume nutrients, for sesame seed set rate and quality has a certain impact, so the need for appropriate topping. 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 photosynthesis of leaves can improve seed setting rate and plumping degree of seeds, and the effect of increasing yield and quality is obvious.

2. Sesame topping time

Sesame topping time must be controlled well, topping too early will reduce the number of capsules and photosynthetic leaves, topping too late will not achieve the purpose of regulating nutrients, resulting in an increase in the number of invalid capsules. Generally, topping time is carried out after 60 days, and the best time is 25-30 days, that is, three weeks after the first flower. The specific time depends on the variety, season and climatic conditions. Generally, autumn cultivars can be topped 24 days after flowering, and summer cultivation is generally topped 25-30 days after the first flower.

3. Top precautions

Although sesame can be topped, it is forbidden to thresh leaves. Farmers in some sesame planting areas will pick sesame leaves for use, which will cause sesame yield reduction of about 20%-30%. The photosynthetic products of Sesame were transported and distributed most like lateral capsule in the functional leaves after initial flowering, followed by lateral capsule and lateral capsule. Therefore, the sesame seed after defoliation will cause the capsule seed fullness to decline and the quality to be poor, so defoliation should be prohibited.

4. Plant growth regulators

When crops are planted, in order to ensure yield. Some plant growth regulators will be used, such as cotton topping flumetamine, sesame can also use chlormequat, triiodobenzoic acid, etc., can effectively improve yield, reduce the rate of grain, but the multi-effect fruiting used in crop production has no effect on sesame yield, can not replace topping.

The above is the sesame topping time and precautions introduction, hope to help you, want to know more related knowledge, please pay attention to us.