Soil has certain fertility and can support the growth of plants. It is also formed by natural factors and human factors. The most essential feature of soil is fertility, which is one of the important factors that compose fertility and is also important for vegetation succession. One of the driving forces. In the Ejina Oasis in the lower reaches of the Heihe River, due to the constraints of natural factors and the influence of human activities, the soil degradation and fertility reduction in the oasis have reduced in recent years, which has directly led to the decline of the productivity of the oasis, and the ecological environment deterioration has generally occurred in the Oasis region. How to reasonably develop and utilize the soil resources in desert oasis area has become an important issue. The use of soil nutrient analyzer to study the spatial heterogeneity of soil nutrients has important theoretical and practical significance for the scientific management and rational use of soil nutrient resources, vegetation restoration and reconstruction in desert and oasis areas.
The area is characterized by low precipitation and strong evaporation. The average annual temperature is 817 years. The average annual rainfall is 3,616 mm, and the average annual evaporation is 350,517 mm. The Ejina River is the source of life for the Ejina Oasis. However, due to the continuous reduction of the water flow in the Heihe River, the amount of groundwater recharge is reduced, resulting in a drop in the water level of the oasis and deterioration of the water quality. As a result, the oasis vegetation is degraded and the area is reduced. As a direct result of the aridity of the land, the surface plants have died and desertification has intensified. The total land area of ​​6213% is 117 times the area of ​​the oasis. The superposition of natural factors and human activities has shaped the characteristics of desertified soils with rough soil, thin soil, dry soil, soluble soil salts, organic matter deficiency, low effective components, and low soil productivity. .
Based on the determination of soil nutrient measuring instrument, the study found that the soil organic matter, total nitrogen, and total potassium in the Ejina desert oasis have a strong spatial correlation and are mainly affected by structural factors. The total phosphorus has a moderate spatial correlation and is structurally affected. The combined effects of factors and random factors. The spatially effective distances of total nitrogen, total phosphorus and total potassium were 7168 to 7186 km, and the soil organic matter had a small variation of 514 km. The spatial distribution of soil nutrients shows a high north-south distribution and a low distribution pattern in the middle. The above results have important reference role for the assessment of land productivity in the Ejina desert oasis.
The area is characterized by low precipitation and strong evaporation. The average annual temperature is 817 years. The average annual rainfall is 3,616 mm, and the average annual evaporation is 350,517 mm. The Ejina River is the source of life for the Ejina Oasis. However, due to the continuous reduction of the water flow in the Heihe River, the amount of groundwater recharge is reduced, resulting in a drop in the water level of the oasis and deterioration of the water quality. As a result, the oasis vegetation is degraded and the area is reduced. As a direct result of the aridity of the land, the surface plants have died and desertification has intensified. The total land area of ​​6213% is 117 times the area of ​​the oasis. The superposition of natural factors and human activities has shaped the characteristics of desertified soils with rough soil, thin soil, dry soil, soluble soil salts, organic matter deficiency, low effective components, and low soil productivity. .
Based on the determination of soil nutrient measuring instrument, the study found that the soil organic matter, total nitrogen, and total potassium in the Ejina desert oasis have a strong spatial correlation and are mainly affected by structural factors. The total phosphorus has a moderate spatial correlation and is structurally affected. The combined effects of factors and random factors. The spatially effective distances of total nitrogen, total phosphorus and total potassium were 7168 to 7186 km, and the soil organic matter had a small variation of 514 km. The spatial distribution of soil nutrients shows a high north-south distribution and a low distribution pattern in the middle. The above results have important reference role for the assessment of land productivity in the Ejina desert oasis.
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