Subjects: Agriculture, Forestry,Livestock & Aquatic Products Science >> Soil Science submitted time 2023-05-30 Cooperative journals: 《干旱区研究》
Abstract： This study was established to evaluate the influence of the Jilantai Salt Lake protection system on soil nutrient accumulation. This is a comparative study of soil nutrient accumulation in different protection system types under the salt lake protection system (zones for fixing shifting sand, fencing dunes for grass recovery, preventing wind and stopping sand, and a forest for protecting the salt lake) using the method of representative investigation and laboratory analysis. The goal was to provide a theoretical basis for the management of shelter forest in Jilantai Salt Lake. Our results showed the following: (1) The increases in soil organic carbon (SOC), total nitrogen (TN), total phosphorus (TP), available nitrogen (AN), and available phosphorus (AP) contents were in the range of 0.45-1.92 g·kg-1, 0.03-0.58 g·kg-1, 0.15-0.43 g·kg-1, 1.33-13.31 mg·kg-1, and 0.12-12.94 mg· kg-1, respectively. Soil depth, protection system type, and their interaction had significant positive effects on the increase in the soil SOC, TN, TP, and AP contents. (2) Establishment of the salt lake protection system had a significant effect on soil nutrients at a depth of approximately 0-100 cm, and the soil depth, protection system type, and their interaction had a significant impact on soil TP relative interaction intense (RIITP), AN relative interaction intense (RIIAN), AP relative interaction intense (RIIAP), and total RII. (3) Nutrient restoration index showed that soil nutrients improved to different degrees in different protection system types of the salt lake protection system, and their nutrient restoration indexes of zones for fixing shifting sand, fencing dunes for grass recovery, preventing wind and stopping sand and a forest for protecting the salt lake were 7.83%, 37.72%, 185.12%, and 252.36%, respectively. This study showed that, in the 38 years since its establishment, the salt lake protection system could effectively promote soil nutrient accumulation and accelerate soil nutrient restoration in the salt lake area, benefitting the ecological restoration and reconstruction around Jilantai Salt Lake.
Subjects: Environmental Sciences, Resource Sciences >> Other Disciplines of Environmental Sciences, Resource Sciences submitted time 2021-03-02 Cooperative journals: 《干旱区研究》
Abstract：利用库姆塔格沙漠南北两侧洪积扇2017年6月至2018年5月的野外实测降水数据，对其降水特征进行了详细的分析，结果表明：（1）受地理位置、地形等的影响，库姆塔格沙漠降水空间分布差异较大。北侧北山洪积扇三垄沙地区的年降水量最小，为21.6 mm；南侧阿尔金山洪积扇降水量自西向东逐渐增多，胡杨沟上游、乌什喀特、赛马沟和多坝沟的年降水量分别为73.0、75.2、176.0 mm和137.4 mm；南侧阿尔金山洪积扇降水量大致自北向南逐渐增多，胡杨沟下游和中游年降水量分别为58.0 mm和56.4 mm，小于胡杨沟上游。（2）库姆塔格沙漠南北两侧洪积扇的降水主要发生在5—8月，累计降水量占到全年90 %左右。（3）库姆塔格沙漠南北两侧洪积扇年降水次数介于11~26次，数量较少的大降水事件对年总降水量贡献率大。
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