With the improvement of production conditions and the increase of fertilization level, the phenomenon of excessive nutrient growth often occurs in crop production. Failure to adjust and control in time will lead to a decrease in the quantity and quality of products. In addition to chemical control and prosperous production, many artificial control technologies now have good regulation and control effects.
1, deep cultivator. In the early stage of the growth of many dry land crops, the use of certain instruments to deepen the soil between the rows or between plants, cut off part of the root system, and reduce the absorption of root water and nutrients, can achieve the purpose of slowing down the growth of stems and leaves and controlling the growth.
2, repression. Continuous suppression or heavy repression at the seedling stage of the crop can control the growth of the shoot. For the early sowing and winter wheat crops with leggy appearance, adopting continuous repression can inhibit the length of the main stem and the big stem, narrow the size gap, and suppress the growth of overly-strength wheat seedlings, which is also conducive to overwintering and freezing.
3, drying field. Shaitian is a special high-level cultivation technology measure that is first controlled and promoted in rice production. The main role of the drying field is to change the soil environment, promote root development, inhibit shoot length and control ineffective delivery. Generally speaking, when the delivery is early, when the hair is full, and the growing trend is strong, it should be sunburned and re-sunshine, otherwise it should be exposed to the sun, light or no sun. Saline land is generally not suitable for drying.
4, hit (cut) leaves. Using hand-pick or knife-cut methods, remove a part of the leaves, reduce the consumption of leaves, and improve the ventilation and light conditions in the field, which is conducive to the growth and development of reproductive organs.
5, topping (top). During the entire growth and development of the infinite inflorescence crop, as long as the top buds are not damaged, they can continuously differentiate into new branches and leaves. Removal of the top of the main stem can eliminate the apical dominance, inhibit the growth of stems and leaves, redistribute nutrients, reduce ineffective branches and leaves, promote the growth and development of the reproductive organs, and increase the number of bobbins and bolls, which can generally increase production by 10%.
6, pruning. Mainly refers to the removal of invalid collaterals and buds, which are more commonly used in cotton and bean crops. When leaves and ineffective shoots appear, they should be removed manually in time. This will not only reduce nutrient consumption, but also improve the wind-transparent conditions between strains.
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