Four aspects of the effect of soil on wheat root growth

With the increasing understanding of the role of the root system, more and more attention has been paid to the study of crop roots. Specific to the wheat root system, the occurrence, location, role, and number of primary and secondary roots have been preliminarily identified. The rooting force at the base of the same stem section increases with the increase of node position, and the primary root is closely related to the growth of the whole wheat growth period. Whether or not the tillers can be related to the presence or absence of independent root systems, etc. In terms of the ecological effects of the root system, the development of the root system of autumn sowing and spring sowing of wheat is preliminarily confirmed. Under the condition of permafrost, the wheat root still has obvious physiological activity, soil type and soil. The arrangement of layers affects the distribution and development of root systems. In terms of the effect of root systems on cultivation measures, it is initially clear that deep plowing can significantly improve the distribution and development of wheat roots, and the fertilization and irrigation periods have a corresponding relationship with root activity changes, and the sowing density and root activity maintenance time are The speed of aging related to the cabinet, early sowing early promotion of early winter hair roots, is more conducive to the rapid expansion of spring roots and so on.

1) The response of wheat root system to soil moisture status is that the relative soil moisture content is in the range of 70% to 80%, and the occurrence, growth, and physiological metabolism of root systems can basically proceed normally. If it is less than 60%, it has a significant effect, and if it is less than 30%, the occurrence of roots and growth stagnation or death. In particular, soil drought in spring has the greatest impact on root development.

2) Henan is located in the transition zone from the subtropical to the warm temperate zone. The temperature fluctuations in the winter and spring seasons are very large. The effect of this fluctuation on wheat is most sensitive to the root system. In spring and autumn, the responses in spring and autumn are different. The trend of temperature fluctuations in autumn and winter is from high to low. The response of roots is that the growth rate varies with temperature fluctuations, and the trend of temperature fluctuation in spring is from low to high. If the fluctuation is large and the temperature rises for a short period of time, it will cause the intensification of the contradiction between the supply and demand of the water in the plant body, and it will quickly cause partial root growth stagnation or death.

3) Different fertilization horizons cause the development of wheat roots. Fertilizing the upper layer and contacting the roots with the fertilizer early can promote the early and robust development of the root system, and it is also conducive to deeper drilling. Deep-fertilizer can promote deep root volume and expand the use of water and fertilizer. However, overemphasizing deep fertilization not only slowed the development of the upper root system, but also did not have much deep root volume. Therefore, in order to meet the root distribution requirements of high-yield and stable wheat production, it is necessary to combine top-fertilizer with deep-fertilizer.

4) In the field production, some of the tillers with independent roots will gradually disappear, and the death of this kind of tiller is only the death of the leaves and young panicles or the elongation of the stem section, and the tillering festival does not die, still with the main stem of the branches. The knots are closely linked, and their secondary roots continue to maintain their normal viability, and they also play a role in the roots of the entire plant.

Related Instruments: Root Analyzer Soil Crusher

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