The spatial variability of soil moisture is the existence of objective facts and it is also recognized by the majority of researchers. The study of soil moisture in sandy lands found that it is not only affected by sand minerals and mechanical components, but also affected by temperature, precipitation, and vegetation type density. Coconut planting in Hainan Province has been long-standing and has a very wide area. The soil in which coconuts are planted is generally dominated by sandy sandy soils. The nutrients in the soil are low, the water conditions are poor, and they are slightly acidic. For a long time, the soil moisture of coconut forest was mainly concentrated on the study of soil moisture by traditional methods. However, the spatial variation characteristics of soil moisture in coconut forests were rarely reported using geostatistics. The study used the coastal sand of Wenchang City in Hainan Province as an example to study the effects of different planting densities of coconut and intercropping on the spatial differentiation of soil moisture, in order to provide a reference for the rational production and management of the coconut forest ecoregion in the coastal sand. For measuring soil moisture, it is recommended to use a multi-point soil temperature and humidity recorder.
Coastal sandy soil is a poorly nutrient soil type, and its long-term exposed exposure causes rapid leakage and evaporation of atmospheric precipitation. Therefore, soil moisture in coconut forests plays an important role in the water-heat balance and system stability of coastal coconut ecosystems. In contrast, the forage grass under the coconut forest can enhance the water retention of the soil under the coconut forest. Based on this, the present study further explored the spatial heterogeneity of the soil moisture under the coconut forest in coastal sandy lands, and the surface soil moisture in the study area. Concentrated in 3.5410.77%, both showed weak variations. 0-20, 2040, 4060 [The second layer of soil water content is normally distributed. The soil surface water content generally has a good spatial variability structure. The soil moisture content of soil in the second soil has a moderate spatial correlation, and the soil water content in the second and the 4060 cm soil layer has a strong spatial correlation and soil moisture content. The spatial variability is clearly hierarchical. The semivariogram model can further study the spatial difference of soil moisture. The soil moisture in each layer of the study area is in accordance with the Gaussian model, and the fitting effect is good, and the corresponding spatial continuity is also better. Contour plots show that the surface soil moisture has a significant step-like distribution pattern, combined with semi-variance analysis can be seen: sandy loam, micro-geomorphology and vegetation are important factors affecting the spatial variability and distribution pattern of soil moisture in the study area.
Through the use of multi-point soil temperature and humidity recorders to measure the soil moisture of pastures in the coconut fields of coastal sandy land, it was found that forages have a certain regulation effect on the soil moisture in the coastal areas, and there are very important guidelines for the improvement and rational use of water resources. effect. This study was conducted on a small-scale sampling and preliminary understanding of the mechanism of spatial heterogeneity of soil moisture in intercropped coconut grasses in coastal sandy land, which laid the foundation for further large-scale sampling analysis.
Coastal sandy soil is a poorly nutrient soil type, and its long-term exposed exposure causes rapid leakage and evaporation of atmospheric precipitation. Therefore, soil moisture in coconut forests plays an important role in the water-heat balance and system stability of coastal coconut ecosystems. In contrast, the forage grass under the coconut forest can enhance the water retention of the soil under the coconut forest. Based on this, the present study further explored the spatial heterogeneity of the soil moisture under the coconut forest in coastal sandy lands, and the surface soil moisture in the study area. Concentrated in 3.5410.77%, both showed weak variations. 0-20, 2040, 4060 [The second layer of soil water content is normally distributed. The soil surface water content generally has a good spatial variability structure. The soil moisture content of soil in the second soil has a moderate spatial correlation, and the soil water content in the second and the 4060 cm soil layer has a strong spatial correlation and soil moisture content. The spatial variability is clearly hierarchical. The semivariogram model can further study the spatial difference of soil moisture. The soil moisture in each layer of the study area is in accordance with the Gaussian model, and the fitting effect is good, and the corresponding spatial continuity is also better. Contour plots show that the surface soil moisture has a significant step-like distribution pattern, combined with semi-variance analysis can be seen: sandy loam, micro-geomorphology and vegetation are important factors affecting the spatial variability and distribution pattern of soil moisture in the study area.
Through the use of multi-point soil temperature and humidity recorders to measure the soil moisture of pastures in the coconut fields of coastal sandy land, it was found that forages have a certain regulation effect on the soil moisture in the coastal areas, and there are very important guidelines for the improvement and rational use of water resources. effect. This study was conducted on a small-scale sampling and preliminary understanding of the mechanism of spatial heterogeneity of soil moisture in intercropped coconut grasses in coastal sandy land, which laid the foundation for further large-scale sampling analysis.
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