The soil P fractions, PCGs abundances, P cycling process abundance, and soil properties

Soil metagenomic data of alpine meadow on the Tibetan Plateau under warming and altered precipitation.The warming-by-precipitation experiment was established in May 2015 at the Alpine Research Station (33°59’N, 102°00’E, ca. 3538 m above sea level) in the eastern Gannan Autonomous Prefecture, Gansu Province, China.A two-factor full factorial interaction manipulation experiment was designed with a randomized block design, including two levels of atmospheric temperature (ambient temperature [T⁰] and warming [T⁺]) and three levels of precipitation (ambient precipitation [nP], 30% precipitation reduction [-P], and 30% precipitation increase [+P]), totally resulting in six treatment combinations. Specifically, six treatments were conducted, including (1) T⁰-P, (2) T⁺-P, (3) T⁰nP, (4) T⁺nP, (5) T⁰+P, and (6) T⁺+P. Each treatment was replicated in four fields (four plots, each 4 m × 4 m). The plots within each block were separated by access paths that were 1.5 m wide, while the distance between adjacent blocks was 5 m.Due to the absence of electricity in the field, the warming treatment was achieved by installing four hexagonal open-top chambers into each plot, which consisted of six transparent polymethyl methacrylate (PMMA) isosceles trapezoidal plates measuring 0.59 m and 0.75 m wide at the top and bottom, respectively, and 0.52 m tall. These devices resulted in an average daily air temperature increase of 1.54 ± 0.07 °C (mean ± standard error) at 15 cm above the ground throughout the growing season (Zhang et al., 2020). The precipitation manipulations in each plot were achieved by deploying rainfall-excluding shelters periodically and individually. Furthermore, distinct precipitation treatments were implemented in each plot throughout the period. Specifically, PMMA shelters were placed 1 m high above the soil to intercept 30% of rainfall for the decreased precipitation (T⁰-P and T⁺-P) treatments. This rainwater was collected and evenly distributed among the nearest increased precipitation (T⁰+P and T⁺+P) plots throughout the growing season.

青藏高原高寒草甸增温与降水改变下的土壤宏基因组（metagenomic）数据集。本增温-降水交互实验于2015年5月在中国甘肃省甘南藏族自治州东部的高寒研究站（北纬33°59′，东经102°00′，海拔约3538米）设立。实验采用随机区组设计的双因素全因子交互操控方案，设置2个大气温度梯度（对照温度[T⁰]与增温[T⁺]）与3个降水梯度（对照降水[nP]、30%降水减少[-P]及30%降水增加[+P]），共计6种处理组合。具体共设置6种处理：(1) T⁰-P、(2) T⁺-P、(3) T⁰nP、(4) T⁺nP、(5) T⁰+P及(6) T⁺+P。每种处理设置4个重复样地（每个样地面积为4米×4米）。每个区组内的样地以1.5米宽的通行步道分隔，相邻区组间的间距为5米。由于野外无电力供应，增温处理通过在每个样地内安装4个六边形开顶式生长室实现：该生长室由6块透明聚甲基丙烯酸甲酯（polymethyl methacrylate, PMMA）等腰梯形板组成，上下底宽度分别为0.59米与0.75米，高度为0.52米。该装置在整个生长季内，可使地面15厘米高度处的日均气温升高1.54±0.07℃（平均值±标准误）（Zhang等，2020）。每个样地的降水操控通过周期性、单独布设避雨棚实现。此外，实验期间各处理样地均执行差异化降水调控方案。具体而言，对于降水减少处理（T⁰-P与T⁺-P），将聚甲基丙烯酸甲酯避雨棚架设于土壤上方1米高度处，以截留30%的自然降雨；截留的雨水会在整个生长季被收集并均匀分配至邻近的降水增加处理（T⁰+P与T⁺+P）样地中。