土壤侵蚀速率与自然成土速率相差多大？
How do soil erosion rates compare with natural soil formation rates?
在不少农业区，人为加速的侵蚀比自然成土快十倍甚至上百倍，导致表层沃土净流失。联合国粮农组织估计全球大量耕地正以不可持续的速度退化，威胁长期粮食生产能力。
In many farmed areas, human-accelerated erosion outpaces natural soil formation by tenfold to over a hundredfold, causing a net loss of fertile topsoil. FAO estimates large croplands are degrading unsustainably, threatening long-term food production.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
G. Tyler Miller,《Living in the Environment》Cengage 多版
G. T. Miller, Living in the Environment, Cengage Learning, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL66394W：Living in the environment
#土壤侵蚀 #成土速率 #退化
什么是“磷峰值”？
What is peak phosphorus?
磷是生命必需、且几乎全部依赖开采磷矿的养分，而高品位磷矿被认为会在本世纪走向枯竭。与可循环的氮不同，磷一旦随废水入海便难以回收，因此“磷峰值”提醒我们要提高磷的循环利用。
Phosphorus is essential to life and almost entirely sourced from finite phosphate rock, whose high-grade reserves are expected to deplete this century. Unlike recyclable nitrogen, phosphorus lost to the sea via wastewater is hard to recover, so 'peak phosphorus' calls for better recycling.
难度 专业 · 适合 小学高段(9-12)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
左玉辉 主编,《环境学》第2版,高等教育出版社,2009
Zuo Yuhui ed., Environmental Science, 2nd ed., Higher Education Press, 2009
独立核验依据 · Independent verification: 核验依据 2 DOUBAN ISBN 标识 9787040283327（按标识回读: 环境学）
#磷峰值 #磷矿 #循环
我国北方荒漠化地区推广的草方格沙障为什么能够固定流动沙丘?其作用机理是什么?
Why do straw checkerboard barriers widely deployed in northern China's desertified regions stabilize shifting sand dunes, and what is the underlying mechanism?
草方格通过增大地表粗糙度,将近地面的风速降至起沙临界值以下,从而削弱风沙流的侵蚀搬运能力。方格内部形成的稳定湍流层促使沙粒在格内沉降堆积,同时麦秸腐烂后为土壤输入有机质,改善水分入渗条件。这为固沙植物如梭梭和沙蒿的定居创造了微环境,最终形成生物与工程措施相结合的持久固沙体系。
Straw checkerboards raise surface roughness, dropping near-ground wind speed below the threshold for sand entrainment and thereby weakening the erosive transport capacity of windblown sand. A stable turbulent layer forms inside each cell, causing particles to settle within it, while the decomposing straw adds organic matter and improves infiltration. This creates microhabitats where xerophytic shrubs such as saxaul and Artemisia sphaerocephala can establish, ultimately yielding a durable system that combines biological and engineering measures.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-11-04
来源 · Source
Lü 等,《Aeolian sand transport above three desert surfaces in northern China with different characteristics (shifting sand, straw checkerboard, and gravel): field observations》,Environmental Earth Sciences,2016 (DOI: 10.1007/s12665-016-5361-7)
Lü et al., 'Aeolian sand transport above three desert surfaces in northern China with different characteristics (shifting sand, straw checkerboard, and gravel): field observations', Environmental Earth Sciences, 2016, DOI: 10.1007/s12665-016-5361-7
独立核验依据 · Independent verification: 核验依据 1 Crossref DOI 10.1007/s12665-016-5361-7
#荒漠化 #风沙治理
什么是“土壤碳封存”，它被视为减缓气候变化的何种潜力？
What is soil carbon sequestration, and what climate-mitigation potential is attributed to it?
土壤碳封存是通过改进农林管理措施（如免耕、覆盖作物、施用有机肥、农林复合）把大气二氧化碳固定并长期储存在土壤有机质中的过程。土壤是全球最大的陆地碳库之一，IPCC 土地特别报告指出提升土壤碳汇可在减缓气候变化中发挥显著但有限的贡献。
Soil carbon sequestration is the process of capturing atmospheric CO2 and storing it long-term in soil organic matter through improved farming and forestry practices—such as no-till, cover crops, organic amendments, and agroforestry. Soil is among the largest terrestrial carbon pools, and the IPCC Land Special Report notes enhancing soil carbon can make a significant but limited contribution to climate mitigation.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
G. Tyler Miller,《Living in the Environment》Cengage 多版
G. T. Miller, Living in the Environment, Cengage Learning, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL66394W：Living in the environment
#土壤碳封存 #有机碳 #免耕 #农林复合 #IPCC土地报告
为什么酸雨会伤害树木？
Why does acid rain harm trees?
酸性降水淋失土壤养分并直接腐蚀叶片。
Acid rain leaches nutrients and burns leaves.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
G. Tyler Miller,《Living in the Environment》Cengage 多版
G. T. Miller, Living in the Environment, Cengage Learning, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL66394W：Living in the environment
#酸雨 #养分 #叶片
土壤是怎样“长”出来的？
How does soil 'grow'?
成土作用受气候、生物、母岩、地形和时间五大因素共同塑造：岩石经风化破碎，加上枯枝落叶和微生物变成腐殖质，慢慢积累成有结构的土壤。形成几厘米可耕土往往要数百年。
Pedogenesis is shaped by five factors—climate, organisms, parent material, topography and time: rock weathers into fragments, and litter and microbes turn into humus, gradually building structured soil. Forming a few centimetres of arable soil can take centuries.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
G. Tyler Miller,《Living in the Environment》Cengage 多版
G. T. Miller, Living in the Environment, Cengage Learning, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL66394W：Living in the environment
#成土作用 #风化 #腐殖质
什么是“荒漠化”，它主要发生在哪些地区？
What is desertification, and where does it mainly occur?
荒漠化指干旱、半干旱和亚湿润干旱区的土地因气候变化和人为压力（如过度放牧、滥垦）而退化为类似荒漠的过程。它主要发生在非洲萨赫勒、中亚和中东等地，威胁数亿人的粮食与生计安全。
Desertification is the degradation of land in arid, semi-arid, and dry sub-humid areas into desert-like conditions, driven by climate variability and human pressures such as overgrazing and unsustainable farming. It occurs mainly across Africa's Sahel, Central Asia, and the Middle East, threatening the food and livelihoods of hundreds of millions.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
G. Tyler Miller,《Living in the Environment》Cengage 多版
G. T. Miller, Living in the Environment, Cengage Learning, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL66394W：Living in the environment
#荒漠化 #干旱区 #萨赫勒 #过度放牧 #土地退化
什么是“土壤侵蚀”，主要原因是什么？
What is soil erosion and what causes it?
土壤侵蚀是表土被风或水冲走的现象，滥伐、过度放牧、陡坡开垦会加剧它，使土地变贫瘠、河流淤积。
Soil erosion is topsoil carried away by wind or water; deforestation, overgrazing and steep-slope farming worsen it, impoverishing land and silting rivers.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
G. Tyler Miller,《Living in the Environment》Cengage 多版
G. T. Miller, Living in the Environment, Cengage Learning, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL66394W：Living in the environment
#土壤侵蚀 #风蚀 #水蚀
什么是“土壤有机质”？
What is soil organic matter?
土壤有机质是腐烂的动植物和微生物残体，能保水保肥、改善结构；含量越高土壤越肥沃，过度耕作会使其下降。
Soil organic matter is decayed plant, animal and microbial residue that holds water and nutrients and improves structure; more of it means richer soil, and tillage reduces it.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
G. Tyler Miller,《Living in the Environment》Cengage 多版
G. T. Miller, Living in the Environment, Cengage Learning, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL66394W：Living in the environment
#有机质 #肥沃 #保水
灌溉不当为什么会造成土壤盐渍化？
Why can improper irrigation cause soil salinization?
用含少量盐分的水长期灌溉，水分蒸发后盐分留在表层，若排水不良就会越积越多。盐渍化会抑制作物根系吸水、降低产量，是许多古老灌溉区（如两河平原）面临的难题。
Irrigating long-term with slightly salty water leaves salts behind as water evaporates, and without good drainage they build up. Salinization hinders crop roots from taking up water and cuts yields, a challenge in many old irrigated regions like the Mesopotamian plain.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
G. Tyler Miller,《Living in the Environment》Cengage 多版
G. T. Miller, Living in the Environment, Cengage Learning, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL66394W：Living in the environment
#盐渍化 #灌溉 #排水
重金属是怎样污染土壤的？
How do heavy metals contaminate soil?
采矿、污水灌溉和工业排放把铅、镉、砷等重金属带入土壤，它们不被降解、长期积累，并通过作物进入食物链危害人体。
Mining, sewage irrigation and industry add lead, cadmium and arsenic to soil; they persist, accumulate and enter the food chain via crops, harming health.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
G. Tyler Miller,《Living in the Environment》Cengage 多版
G. T. Miller, Living in the Environment, Cengage Learning, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL66394W：Living in the environment
#重金属 #镉 #食物链
什么是“轮作”，为什么有利于土壤？
What is crop rotation and why is it good for soil?
轮作是不同季节轮流种不同作物（如豆科后种谷物），可均衡养分、打断病虫害循环、减少化肥，保持地力。
Crop rotation alternates different crops (e.g., legumes then grains) to balance nutrients, break pest cycles and cut fertilizer use, sustaining fertility.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
G. Tyler Miller,《Living in the Environment》Cengage 多版
G. T. Miller, Living in the Environment, Cengage Learning, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL66394W：Living in the environment
#轮作 #豆科 #地力
什么是土壤“盐渍化（salinization）”，灌溉农业中为何容易出现？
What is soil salinization, and why does it commonly arise in irrigated agriculture?
盐渍化是土壤中可溶性盐分累积到损害作物生长水平的过程。在灌溉农业中，若排水不畅且蒸发强烈，灌溉水中的盐分便在表层富集，长期会板结土壤、降低产量，是许多古老灌区（如中东、澳洲）面临的老问题。
Salinization is the buildup of soluble salts in soil to levels that harm crop growth. In irrigated agriculture, poor drainage combined with high evaporation concentrates salts at the surface, gradually hardening the soil and lowering yields—a long-standing problem in many ancient irrigation regions such as the Middle East and Australia.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
G. Tyler Miller,《Living in the Environment》Cengage 多版
G. T. Miller, Living in the Environment, Cengage Learning, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL66394W：Living in the environment
#盐渍化 #灌溉 #排水 #蒸发 #作物减产
土壤里也有“生物多样性”吗？
Is there also 'biodiversity' in the soil?
有，而且极其丰富：一汤匙健康土壤里可能有蚯蚓、跳虫、真菌菌丝和数以亿计的细菌。这个“土壤食物网”负责分解枯落物、循环养分、抑制病害，是地上生态系统的基础。
Yes, and it is extraordinarily rich: a spoonful of healthy soil can hold earthworms, springtails, fungal threads and billions of bacteria. This 'soil food web' decomposes litter, cycles nutrients and suppresses disease, underpinning the ecosystems above.
难度 进阶 · 适合 小学低段(6-8)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
G. Tyler Miller,《Living in the Environment》Cengage 多版
G. T. Miller, Living in the Environment, Cengage Learning, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL66394W：Living in the environment
#土壤生物多样性 #土壤食物网 #微生物
土壤有机碳为什么重要？
Why is soil organic carbon important?
土壤有机碳是植物残体和微生物产物在土中积累的部分，是陆地上最大的活跃碳库之一，超过大气和植被碳的总和。它既关乎肥力和保水，也关乎把碳锁在地下、减缓气候变化。
Soil organic carbon is the part of dead plant matter and microbial products stored in soil, forming one of the largest active carbon pools on land, exceeding the carbon in air and vegetation combined. It matters for fertility and water retention and for locking carbon underground.
难度 进阶 · 适合 小学高段(9-12)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
G. Tyler Miller,《Living in the Environment》Cengage 多版
G. T. Miller, Living in the Environment, Cengage Learning, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL66394W：Living in the environment
#土壤有机碳 #碳库 #肥力
中国“三北”防护林工程在防治荒漠化方面采取了哪些主要技术路线?
What are the main technical approaches of China's Three-North Shelterbelt Program for combating desertification?
该工程自1978年启动,通过营造带状防护林、封沙育林育草与农田草场防护网相结合的方式固定流动沙丘、降低风速。近年在水资源约束下转向以灌木和乡土树种为主的低耗水配置,并配合草方格沙障与飞播造林,强调成活率与区域水量平衡而非单纯扩大林地面积。
Launched in 1978, the program stabilizes shifting dunes and lowers wind speed by combining linear shelterbelts, enclosure for natural regeneration of trees and grasses, and protective networks around farmland and rangeland. In recent years it has shifted toward low-water-use configurations dominated by shrubs and native species under water-resource constraints, supplemented by straw checkerboard barriers and aerial seeding, prioritizing survival rates and regional water balance over simply expanding forested area.
难度 进阶 · 适合 大众
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：此条未指向带版次的可引用著作（通识性内容、机构文件或未展开的英文书名），本库不提供独立书目出处；如需精确引用，需由编辑补全具体篇目与版次。
国家林业和草原局三北工程建设公报;Wang et al., Land Degradation & Development 相关评估论文
National Forestry and Grassland Administration bulletins on the Three-North Program; assessments by Wang et al. in Land Degradation & Development
#荒漠化治理 #三北防护林
再生农业能让农田变回碳库吗?免耕覆盖这些做法真的管用吗?
Can regenerative farming turn fields back into carbon vaults — do no-till and cover crops really work?
土壤储存的碳比大气与植被总和还多,耕作翻土让有机质暴露氧化,百年来全球农田损失了两到三成土壤碳。再生农业的组合拳包括:免耕少耕减少扰动、覆盖作物全年有根、轮作豆科固氮、有机肥回田。元分析显示免耕表层的碳确实增加,但深层常持平甚至下降——碳只是被搬进了浅层,这提醒我们别把局部测量当全局胜利。更稳妥的共识是:再生实践同时改善水保持、生物多样性与肥料效率,碳汇是附带红利而非唯一目标;土壤碳信用额度因此仍需谨慎核算。
Soils hold more carbon than atmosphere plus vegetation combined; tillage exposes organic matter to oxidation, costing global croplands twenty to thirty percent of soil carbon historically. Regenerative combos — no-till or reduced till, year-round cover-crop roots, legume rotations, organic amendments — show real gains in topsoil carbon in meta-analyses, though subsoil often stays flat or falls as carbon merely relocates upward: a caution against local wins declared global. The sturdier consensus values co-benefits — water retention, biodiversity, fertilizer efficiency — treating carbon credits as bonus requiring careful accounting.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
G. Tyler Miller,《Living in the Environment》Cengage 多版
G. T. Miller, Living in the Environment, Cengage Learning, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL66394W：Living in the environment
#再生农业 #土壤有机碳 #免耕
蚯蚓对土壤有什么好处？
How do earthworms help soil?
蚯蚓在土里钻洞、吃腐烂叶子排出粪肥，能让土壤更松软、更肥沃，还能帮助雨水渗下去。
Earthworms tunnel and eat dead leaves, leaving rich casts that loosen and fertilize soil and help rainwater soak in.
难度 入门 · 适合 小学低段(6-8)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
G. Tyler Miller,《Living in the Environment》Cengage 多版
G. T. Miller, Living in the Environment, Cengage Learning, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL66394W：Living in the environment
#蚯蚓 #松土 #肥力