Sesame control growth time, can 4 to 6 leaves control growth?

The time for controlling the growth of sesame is in the full fruit stage, during which the apical buds can be removed, and if the planting area is relatively large, it can be controlled by spraying promethamine or trimethoprim in the full fruit stage. Sesame seedling stage can be applied diluted mature human feces or urea; bud stage can be applied nitrogen fertilizer, phosphorus fertilizer, potassium fertilizer; flowering stage can apply rotten manure, cake manure, barnyard manure and so on.

First, the time for sesame to control prosperity

1. The suitable time to control the growth of sesame is in the full fruit period, during which the apical buds can be removed. If the planting area is relatively large, the growth can be controlled by spraying growth regulators in the full fruit period, usually with metoprolol or dwarf. Foliar spraying can be done.

2. Because the stem of sesame is upright, so the shade area is small, sesame is often mixed with dwarf crops, such as sweet potato, peanut, soybean and other crops or intercropping.

3. Usually make a row of sesame seeds every 2-4 rows of peanuts in the sweet potato field, or every 1-2 rows of ditches, sesame seeds are more resistant to drought, while beans are more resistant to moisture, so the mixed cultivation of sesame and beans is helpful to prevent drought and waterlogging.

4. Sesame is mainly distributed in the provinces of the Yellow River and the middle and lower reaches of the Yangtze River, as well as Anhui, Hubei, Jiangxi, Henan, Hebei and other provinces, of which Henan accounts for about 30% of the total output of the country. According to statistics, the planting area of sesame is about 790000 hectares. The yield is about 580000 tons.

When will the sesame be fertilized

1. Seedling stage

The main results are as follows: (1) generally, too much nitrogen fertilizer is applied when planting, which can easily lead to the growth of seedlings and form tall seedlings, so only part of nitrogen fertilizer is used as base fertilizer in sesame seedling stage.

(2) farmers have the saying of "looking at seedling topdressing". Generally, when the seedling potential is relatively poor, or when the seedling size is different, a small amount of seedling fertilizer can be applied first, and the effect of diluting mature human feces and urine or urea is better, because the sesame root system at this stage is shallow, so it should be applied as shallowly as possible when applying fertilizer.

2. Budding stage

The budding stage is the period of flower bud differentiation, and the vegetative growth and reproductive growth of sesame go hand in hand at the same time. The effect of topdressing is better in this period. During this period, topdressing should be dominated by nitrogen fertilizer, supplemented by phosphorus and potassium fertilizer, and appropriate amount of boron fertilizer can be applied in areas with boron deficiency.

3. Flowering period

(1) Sesame grows rapidly when it enters the flowering stage, and the nutrients absorbed at this stage account for 70%, 80% of the whole growth period. in order to meet the needs of plant growth and development, promote sesame to grow vigorously and accumulate more photosynthates, at the same time, increase the number of flower capsules, stabilize growth in the later stage without early senescence, and promote grain fullness, flower fertilizer must be re-applied.

(2) at this stage, a large number of lateral roots of sesame have begun to form, so the absorptive capacity of the root system is enhanced, and the growth rate of the plant will be accelerated at the same time, so the demand for nutrients is also significantly increased. Generally, chemical fertilizer is more convenient, and rotten manure, cake manure and barnyard manure can also be used during the period.