土壤「微生物碳泵」机制如何帮助长期固碳？
How does the soil microbial carbon pump mechanism aid long-term carbon sequestration?
植物输入的根系与残体碳经微生物代谢转化为难以降解的「微生物残体碳」，并通过矿物结合进入稳定库，这一过程称为微生物碳泵。它解释了为何部分新输入碳可封存数十年至百年以上。
Plant root and residue carbon is metabolized by microbes into resistant microbial necromass that binds to minerals and enters stable pools, a process called the microbial carbon pump. It explains how some newly added carbon can be sequestered for decades to over a century.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：本题原挂出处与答案内容不符，已撤回；具体书目待补，暂不展示来源。
本题原挂出处与答案内容不符，已撤回；具体书目待补。
Previous citation withdrawn as unsupported for this answer; a specific source is pending.
#微生物碳泵 #矿物结合 #稳定碳库
长期超采地下水如何引起城市地面沉降？
How does long-term groundwater over-extraction cause urban land subsidence?
抽取承压含水层中的水会降低孔隙压力，使含水层骨架压缩并不可逆地固结，地表随之下沉。在华北平原与部分三角洲城市，沉降速率可达每年数厘米，叠加海平面上升加剧内涝与工程风险。
Pumping from confined aquifers lowers pore pressure, allowing the aquifer skeleton to compact and consolidate irreversibly, so the land surface subsides. In the North China Plain and some delta cities subsidence reaches several centimeters per year, compounding sea-level rise to worsen flooding and infrastructure risk.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Tarbuck & Lutgens,《Earth Science》第14版,Pearson,2015
E. J. Tarbuck and F. K. Lutgens, Earth Science, 14th ed., Pearson, 2015
#地面沉降 #地下水超采 #含水层压缩
灌溉农业为何容易导致土壤盐碱化？
Why can irrigated agriculture easily lead to soil salinization?
干旱区蒸发强烈，灌溉水带入的盐分在表层累积而难以淋洗，加之排水不畅使地下水位抬升、盐分随毛管水上升至根层。治理依赖改良排水、洗盐与耐盐作物。
In arid regions strong evaporation accumulates salts brought by irrigation at the surface with little leaching, and poor drainage raises the water table so salts rise into the root zone by capillary action. Management relies on improved drainage, leaching, and salt-tolerant crops.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Tarbuck & Lutgens,《Earth Science》第14版,Pearson,2015
E. J. Tarbuck and F. K. Lutgens, Earth Science, 14th ed., Pearson, 2015
#土壤盐碱化 #灌溉 #排水
土壤形成主要受哪几类因素控制？
What main classes of factors control soil formation?
经典土壤学以气候、生物、地形、母岩和时间「五大因子」解释土壤差异，后来补充人为活动因子。不同组合造就从热带砖红壤到寒带灰化土的全球多样性。
Classic soil science explains soil differences through five factors: climate, organisms, topography, parent material, and time, later supplemented by human activity. Their combinations produce global diversity from tropical oxisols to boreal podzols.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Tarbuck & Lutgens,《Earth Science》第14版,Pearson,2015
E. J. Tarbuck and F. K. Lutgens, Earth Science, 14th ed., Pearson, 2015
#土壤发生 #五大因子 #母岩
喀斯特地区的地下河系统是怎么形成的？
How do underground river systems form in karst regions?
可溶性碳酸盐岩在含有CO2的雨水溶蚀下形成溶洞与管道，地表水沿裂隙汇流成地下河，常在洼地集中排泄成泉或伏流。这类系统供水重要但极易受污染且难以追踪。
Soluble carbonate rocks are dissolved by CO2-rich rainwater to form caves and conduits; surface water collects along fractures into underground rivers that emerge as springs or resurgences in depressions. These systems are vital water sources but highly vulnerable to pollution and hard to trace.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Tarbuck & Lutgens,《Earth Science》第14版,Pearson,2015
E. J. Tarbuck and F. K. Lutgens, Earth Science, 14th ed., Pearson, 2015
#喀斯特 #地下河 #岩溶水文
土壤有机碳储量为何与全球碳循环密切相关？
Why is soil organic carbon stock closely tied to the global carbon cycle?
土壤是陆地最大的活跃碳库，其有机碳储量超过植被与大气碳之和，受温度、湿度和土地利用影响而释放或固存。土壤碳的微小变化即可显著影响大气CO2浓度。
Soil is the largest active terrestrial carbon pool, holding more organic carbon than vegetation and the atmosphere combined, and it releases or stores carbon depending on temperature, moisture, and land use. Even small soil-carbon changes can noticeably shift atmospheric CO2.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Tarbuck & Lutgens,《Earth Science》第14版,Pearson,2015
E. J. Tarbuck and F. K. Lutgens, Earth Science, 14th ed., Pearson, 2015
#土壤有机碳 #碳库 #碳循环
地下水污染常用的原位修复技术有哪些？
What common in-situ remediation technologies treat groundwater contamination?
典型原位技术包括抽出处理、空气扰动、可渗透反应墙（如零价铁降解氯代烃）以及生物修复。选择取决于污染物类型、含水层渗透性与场地条件，修复往往耗时数年。
Typical in-situ methods include pump-and-treat, air sparging, permeable reactive barriers (e.g., zero-valent iron degrading chlorinated solvents), and bioremediation. Choice depends on contaminant type, aquifer permeability, and site conditions, and cleanup often takes years.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-10-04
来源 · Source
Fetter 所著教科书《Applied Hydrogeology》第4版(Waveland Press,2001)
Fetter C W, Applied Hydrogeology, 4th edition, Waveland Press, 2001
独立核验依据 · Independent verification: 核验依据 1 ISBN 9780675081269 (2001)
#地下水修复 #可渗透反应墙 #生物修复