什么是土壤团粒结构？它对农业有何意义？
What is soil aggregate structure, and why does it matter to farming?
团粒结构是土壤颗粒黏结成的小团块，使孔隙兼顾通气与保水。良好团粒能抗侵蚀、利根系生长，有机质和蚯蚓等活动有助于形成；耕作不当会破坏它。
Aggregate structure is soil particles bound into small crumbs that balance air-filled and water-held pores. Good aggregation resists erosion and aids roots; organic matter and earthworm activity build it, while poor tillage destroys it.
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
#团粒结构 #孔隙 #农业
什么是土壤pH？它如何影响养分？
What is soil pH, and how does it affect nutrients?
土壤pH表示酸碱度，多数作物适宜6到7。过酸会使铝活化毒害根系并淋失钙镁；过碱则铁、磷等有效性下降。调节pH是土壤改良的重要手段。
Soil pH indicates acidity-alkalinity; most crops prefer 6–7. Too acid mobilizes toxic aluminum and leaches calcium and magnesium; too alkaline lowers availability of iron and phosphorus. Adjusting pH is key to soil improvement.
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
#土壤pH #酸碱 #养分
什么是土壤有机质？它为何重要？
What is soil organic matter, and why is it important?
土壤有机质是动植物残体经微生物分解形成的腐殖质等混合物，占表土比例虽小却决定肥力、结构和保水性。它还能固碳、缓冲酸碱，是土壤健康的核心。
Soil organic matter is the mix of humus and residues from decomposed plants and animals; small in topsoil yet it decides fertility, structure and water retention. It also stores carbon and buffers pH, central to soil health.
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
#有机质 #腐殖质 #肥力
砖红壤化过程如何在热带湿润气候下改造土壤？
How does laterization transform soils under hot, humid tropical climates?
在终年高温多雨的热带，强烈的淋溶把硅、碱金属等易溶成分冲走，留下铁铝氧化物富集的红色黏重土壤。这类砖红壤富含氧化铁而贫瘠，且一旦植被破坏极难恢复。布奥尔等人在《土壤发生与分类》中描述了其诊断特征。
In perennially hot, wet tropics, intense leaching washes out soluble silica and bases, leaving iron and aluminum oxides enriched in a red, heavy soil. Such laterite is rich in iron oxides but infertile, and once vegetation is stripped it is very hard to restore. Buol and colleagues describe its diagnostic traits in Soil Genesis and Classification.
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
#砖红壤化 #热带土壤 #淋溶
灰化作用（podzolization）为什么多发生在针叶林下的酸性土壤中？铁、铝和有机质在剖面中是如何迁移的？
Why does podzolization mainly occur in acidic soils under coniferous forests, and how do iron, aluminium, and organic matter migrate through the profile?
针叶凋落物分解缓慢，释放的有机酸随下渗水强烈淋溶，使上部土层高度酸化。酸性有机配体螯合铁、铝，把它们从漂洗层（E层）向下搬运；当络合物被吸附、微生物分解或因铝饱和而沉淀时，便形成红棕色的灰化淀积层，其上方残留暗色粗腐殖质。这一螯合淋溶—淀积机制正是灰土诊断特性的核心。
Slowly decomposing conifer litter releases fulvic and other organic acids, and intense leaching strongly acidifies the upper soil. Acidic organic ligands chelate iron and aluminium and carry them down from the bleached eluvial (E) horizon; where the complexes are adsorbed, decomposed by microbes, or precipitated once aluminium saturation is reached, a reddish-brown spodic horizon forms while dark raw humus accumulates above. This chelate-leaching-and-deposition mechanism defines the diagnostic features of Spodosols (Podzols).
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-11-04
来源 · Source
Lundström、van Breemen 与 Bain,《The podzolization process. A review》,Geoderma,2000 (DOI: 10.1016/s0016-7061(99)00036-1)
Lundström, van Breemen & Bain, 'The podzolization process. A review', Geoderma, 2000, DOI: 10.1016/s0016-7061(99)00036-1
独立核验依据 · Independent verification: 核验依据 1 Crossref DOI 10.1016/s0016-7061(99)00036-1
#灰化作用 #灰土 #螯合淋溶 #土壤剖面
为什么红壤多分布在热带亚热带？
Why are red soils common in tropical and subtropical regions?
高温多雨使矿物强烈风化，可溶性盐类和硅被淋失，相对富集的铁铝氧化物呈红色，形成红壤。它常酸性强、养分易流失，需要科学管理才能耕作。
High heat and heavy rain drive intense weathering that leaches soluble salts and silica, leaving iron-aluminum oxides that give a red color, forming red soils. They are often acidic with easily lost nutrients and need careful management for farming.
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
#红壤 #风化 #铁铝
什么是盐碱土？它是怎么形成的？
What is saline-alkali soil, and how does it form?
盐碱土是地表积累过多可溶性盐或碱性物质的土壤，多出现在干旱区排水不良处。蒸发强使地下盐分随水上升到表层积聚，影响作物生长。
Saline-alkali soil accumulates excess soluble salts or alkaline substances, common in arid poorly drained areas. Strong evaporation draws groundwater salts to the surface where they accumulate, harming 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
#盐碱土 #盐分 #干旱
典型土壤剖面由哪些层次组成，它们如何反映成土过程？
What horizons make up a typical soil profile, and how do they reflect soil formation?
典型土壤从地表向下依次为富含有机质的表土层、淋溶层、淀积层、母质层与基岩。降水把上层的黏粒与矿物向下搬运，在淀积层重新沉积，形成清晰的层次分化。布雷迪与韦尔在《土壤的本质与性质》中详细解释了这些层次的发育。
A typical soil from the surface down shows an organic-rich topsoil, an eluvial layer, an illuvial layer, parent material, and bedrock. Rainfall transports clay and minerals downward, redepositing them in the illuvial layer and creating clear layering. Brady and Weil explain this horizon development in The Nature and Properties of Soils.
难度 进阶 · 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
#土壤剖面 #土壤层次 #成土作用
蚯蚓对土壤有什么好处？
What good do earthworms do for soil?
蚯蚓吞食有机物和土壤，排泄富含养分的蚓粪，并打通孔隙改善透气透水。它们的活动促进团粒结构形成，被称为「土壤工程师」。
Earthworms eat organic matter and soil, excreting nutrient-rich castings and opening pores that improve air and water flow. Their activity builds aggregate structure, earning them the name 'soil engineers'.
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
#蚯蚓 #蚓粪 #土壤结构
什么是「土壤侵蚀」？人类活动如何加剧它？
What is soil erosion, and how do humans worsen it?
土壤侵蚀是表土被水、风等剥蚀搬运的过程。毁林开荒、过度放牧和不合理耕作会破坏植被与结构，使侵蚀速度远超自然形成，导致土地退化。
Soil erosion is the stripping and transport of topsoil by water and wind. Deforestation, overgrazing and poor tillage destroy vegetation and structure, making erosion far exceed natural formation and degrading land.
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
#土壤侵蚀 #植被 #退化
湿热的热带雨林之下为何常见红色贫瘠的土壤？雨林砍伐后肥力为什么会迅速衰退？
Why do hot, humid rainforests often grow on red, infertile soil, and why does fertility collapse soon after the forest is cleared?
终年高温多雨使化学风化与淋溶极为强烈：可溶性盐基和大部分硅被雨水带走，难溶的铁铝氧化物（如赤铁矿、三水铝石）残留富集，将土壤染成红色，这一过程称为铁铝化。养分绝大部分储存在活生物量与地表枯落物中，矿质土体本身十分瘠薄；植被一经清除，浅表快速养分循环中断，裸露的红壤缺乏养分且易板结侵蚀，肥力随即迅速衰竭。
Perpetual heat and heavy rain drive extreme chemical weathering and leaching: soluble bases and most silica wash away, while insoluble iron and aluminum oxides such as hematite and gibbsite stay behind and stain the soil red—a process called ferrallitization. Almost all nutrients sit in living biomass and surface litter, not in the mineral soil. Clearing the forest breaks this fast, shallow nutrient cycle, exposing a leached soil that hardens and erodes, so fertility collapses quickly.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-11-03
来源 · Source
S.W. Buol、R.J. Southard、R.C. Graham、P.A. McDaniel，《土壤发生与分类》（第6版），Wiley-Blackwell，2011年
S.W. Buol, R.J. Southard, R.C. Graham & P.A. McDaniel, Soil Genesis and Classification, 6th ed., Wiley-Blackwell, 2011
独立核验依据 · Independent verification: 核验依据 1 OPENLIBRARY 标识 /works/OL21492550W：Soil Genesis and Class
#红壤 #铁铝化 #淋溶
蚯蚓粪为什么是好的肥料？
Why is worm cast good fertilizer?
蚯蚓粪富含有机质和多种植物可吸收的养分，且结构疏松、保水透气。它温和不易烧苗，是天然的优质有机肥。
Worm cast is rich in organic matter and many plant-available nutrients, loose in structure and good at holding water and air. Gentle and non-burning, it is a natural high-quality organic fertilizer.
难度 入门 · 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
#蚯蚓粪 #有机肥 #养分
一厘米厚的土壤需要多久形成？
How long does it take to form one centimeter of soil?
自然条件下土壤形成极其缓慢，通常每形成1厘米表土需要数十年到上百年，取决于气候、母岩和生物活动。因此土壤被视为不可再生的珍贵资源。
Under natural conditions soil forms very slowly; one centimeter of topsoil often takes decades to centuries, depending on climate, parent rock and living activity. Soil is thus treated as a precious, nearly non-renewable resource.
难度 入门 · 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
#土壤形成 #表土 #缓慢
土壤是由什么组成的？
What is soil made of?
土壤是矿物质颗粒、有机质、水分和空气的混合物。矿物质来自岩石风化，有机质来自腐烂的植物动物，三者比例决定土壤的肥力和结构。
Soil is a mixture of mineral particles, organic matter, water and air. Minerals come from weathered rock, organic matter from decayed plants and animals, and their proportions decide the soil's fertility and structure.
难度 入门 · 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 #有机质 #矿物质