Subjects: Agriculture, Forestry,Livestock & Aquatic Products Science >> Soil Science submitted time 2023-08-26 Cooperative journals: 《干旱区研究》
Abstract： As an effective agricultural management method for improving ecological and environmental benefits,the farmland shelterbelt system is crucial in improving soil physical and chemical properties, the ecologicalenvironment, and crop yield. This study clarifies the effects of this system on ecosystem functions and provides aguide for the ecological restoration of fragile ecosystems. In the Hetao Irrigation District, three typical farmlandshelterbelts (four-, five-, and eight-line patterns) were selected to measure soil properties at a 0-100 cm depth andvegetation properties of shelterbelts and farmland at different distances (0.3 H, 0.7 H, 1 H, 2 H, 3 H, and 4 H)from the shelterbelts during the growing seasons from 2019 to 2021. Soil moisture storage (SMS) and soilnutrient storage [soil carbon storage (SCS), soil nitrogen storage (SNS), and soil phosphorus storage (SPS)] weremeasured. The results showed that (1) the soil bulk density and clay content of different shelterbelts differedsignificantly in the horizontal direction, while the soil properties differed significantly in the vertical direction. (2)The shelterbelts had enhanced water retention and nutrient supply functions, and the soil water and nutrientreserves of the four-line pattern were higher than those of the five- and eight-line patterns (SMS = 237.44 mm;SCS = 544.93 g·m− 2; SNS = 953.72 g·m− 2; SPS = 859.04 g·m− 2). (3) The average tree height and DBH of thefour- row shelterbelt were 30.06 m and 0.41 m, respectively. Additionally, the four- row shelterbelt had themaximum crop yield of 15.75 t·hm−2. (4) Redundancy analysis showed that a close relationship existed betweenenvironmental factors and ecosystem functions in the different shelterbelts, soil characteristics were closelyrelated to soil water and nutrient reserves, and vegetation attributes were negatively correlated with SNS andSPS. In conclusion, the four-line pattern demonstrated the strongest capacity for water and nutrient supply. Theresults of this study provide a sufficient theoretical basis for shelterbelt construction and ecological restoration inecologically fragile areas.
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