Some Suggestions on the Research of Crop Root Water Absorption

1 Focus on Root Water Absorption Mechanism

Plant root growth and plant root water absorption are two processes that are closely linked. Plant roots absorb water to promote root growth, and root growth in turn increases the depth of the plant's root-absorbing soil layer and shortens the distance the water reaches the root epidermis. Therefore, the process of plant root growth and its influencing factors, the extension rules of plant roots, and the distribution law of plant root density are still the focus of future research.

2 Modify and improve the existing water absorption model of plant roots

The characteristics of plant root development and soil properties determine the complexity of the plant's root water absorption process. Through deepening and detailed research on the root growth and root water absorption mechanism of plants, the existing root water absorption model was revised and improved, and the model parameters were simplified, so that the prediction and simulation of the model were closer to the real root water absorption process and changes. And simple and practical.

3 Research on plant root structure

At present, the primary problem in the study of water uptake in plant roots is how to formulate model expressions from the physical process of water uptake in roots, but also to make it simple and practical. The root structure is the key. Most of the existing plant root structure models do not consider the spatial heterogeneity of the root process. Because of the large variability of soil in space, the parameters obtained from a laboratory or field point are often not universal. Moreover, some parameters have not been well acquired and determined, and these will inevitably affect the established model. Forecast accuracy. Study the two-dimensional and three-dimensional structure of plant roots, and the kinematics mechanism of the spatial variability of plant physiological characteristics. Establish a geometric model of the growth of plant roots, and accurately describe the dependencies of the spatial distribution of root system spatial distribution and the spatial distribution of root functions. Visualization will be a research trend in the future.

4 Root Zone Moisture Transport Capacity Energy Relationship Study

The research on the relationship between water energy and energy in the root zone of plants is to clarify the distribution of water energy and resistance in the whole root system, and the changing rules and interactions of energy and resistance in all parts of the system, as well as the moisture flux and energy and resistance in the system. The distribution of water volume plays an important role. At present, research needs to be strengthened from the following issues: (1) Water potential and resistance distribution rules of various parts of the SPAC related to the plant root system, mutual feedback relationships among various links in the system, and external environmental conditions on the water and energy in the root system Impact of water flow resistance; (2) Relationship between SPAC moisture migration and heat exchange, further understanding of the water-heat and heat transfer mechanism of the root system through SPAC hydrothermal studies; (3) Studying relative transpiration under different conditions The relationship between rate and soil matrix potential, find out the critical value of the relative transpiration rate under different atmospheric vaporization conditions affected by the soil matrix potential, and establish a dynamic evaluation model of soil moisture for plant dynamics; (4) Study the root system with non-steady flow model The water volume distribution and change law.

5 Application of Root Water Absorption Characteristics

Study the water absorption mechanism of plant roots, calculate the water absorption rate and transpiration rate of the root system, simulate the soil water movement in the root layer and the operation process of water in plant tissues, and use this to guide irrigation management. How to apply the existing root water absorption model to the actual production is an issue worthy of attention. It still needs further research and solution.

6 Research on Visualization of Plant Root Processes

The existing studies are expressed using traditional texts, diagrams, and tables, which are extremely inconsequential and comprehensive. With the development and popularization of computer multimedia technology, the model's operating results make use of the computer's powerful images, graphics and other functions to achieve real-time simulation and display of its 3-D scene. This aspect can directly verify the results of the model's operation. On the other hand, it can also help modify and improve the existing model. Ganxian County is a large agricultural county in Liaocheng City, Shandong Province. In the work practice of developing modern agriculture, it has gradually explored and established a set of scientific and standardized agricultural product quality and safety management systems. One of the core is the strict management of pesticides and the prohibition of high toxicity. Use pesticides.

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