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高中地理教材活动系列53

  • 2026-04-04 08:00:04
高中地理教材活动系列53

活动材料

    1.有人认为,热带地区的土壤比温带和寒带地区的要深厚,土壤有机质含量也要丰富。这种说法有道理吗?说明你的判断理由。 

    2.比较黄河三角洲冲积土、青藏高原寒漠土和江南丘陵红壤,说明哪一类土壤的发育程度较好。 

    3.19世纪末,俄国科学家道库恰耶夫在进行大量调查研究的基础上,对土壤成因进行了科学解释,建立了土壤形成因素学说。该学说认为,土壤的形成取决于母质、气候、生物、地形、时间五大成土因素的综合作用。据此,完成相关任务。 

    (1)该学说认为,各成土因素之间相互影响、相互制约,对成土过程产生综合作用。结合所学知识,试举例说明。 

    (2)在教材所论述的成土因素中,道库恰耶夫没有考虑哪一个因素?结合自己所学,简述该因素对土壤形成的深刻影响。

活动目标

    1.运用综合思维分析影响土壤形成的因素及土壤特性。

    2.了解黄河三角洲、青藏高原、江南丘陵等特定区域的土壤类型及其对应的自然环境特征。

    3.了解土壤是漫长的自然历史产物,树立珍惜和保护土壤资源的意识。

活动建议

    1.引导学生关注“收入”与“支出”平衡变化。返回到土壤生物量和外源搬运沉积是“收入”,微生物分解和降雨会淋失养分是“支出”。

    2.注意区别土壤肥沃程度与土壤发育程度。

参考答案

    1.没有道理。土壤中物理、化学过程的性质与强度,既与温度有关,又与降水有关。高温多雨的热带雨林地带,化学与生物风化作用强,风化壳厚,因而土壤层厚度较大;但少雨干旱的热带地区,风化壳薄,发育的土壤层也较薄。另外在常年温暖湿润的气候条件下,微生物活动旺盛,全年都能分解有机质,这将降低土壤中的有机质含量。

    2.黄河三角洲冲积土好于江南丘陵红壤和青藏高原寒漠土。黄河三角洲冲积土是黄河携带来的大量泥沙在入海口处堆积,黄河三角洲地形平坦,土层深厚、肥沃,发育程度较好。江南丘陵地区地形坡度较大,流水作用强烈,地表物质迁移速度较快,很难发育成深厚的土壤。青藏高原形成时间短,地势高,气温低,形成发育程度较差的寒漠土。

    3.(1)海南岛黄壤成土过程分析:黄壤分布在海南岛中部山地,当地气温较低。又因中部山地对夏季风有较强的抬升作用,故降水较多,土壤水分充足,使土壤中的氧化铁水化而导致土壤颜色变黄,表现为淀积层中土壤颜色为黄棕色。当地木本植物居多,少部分有机物以枯枝落叶方式归于土壤表层,所以枯枝落叶层较厚。另外土壤中的蚯蚓等动物也可以改善土壤结构。

    (2)没有考虑人类活动因素。人类活动因素对土壤的作用表现为人类在利用土壤时对土壤的影响。若合理利用,则土壤向良性方向发展;若利用不合理,则容易引起土壤退化。如在南方丘陵红壤区,植树造林可以防止水土流失,针对土壤的酸性特征,可以种植茶树等;若乱砍滥伐,则会引起水土流失、土壤退化。

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  1. CONNECT:[ UseTime:0.000456s ] mysql:host=127.0.0.1;port=3306;dbname=c_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000724s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000312s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000261s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000445s ]
  6. SELECT * FROM `set` [ RunTime:0.000207s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000468s ]
  8. SELECT * FROM `article` WHERE `id` = 464777 LIMIT 1 [ RunTime:0.000354s ]
  9. UPDATE `article` SET `lasttime` = 1775534351 WHERE `id` = 464777 [ RunTime:0.022869s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.004942s ]
  11. SELECT * FROM `article` WHERE `id` < 464777 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000590s ]
  12. SELECT * FROM `article` WHERE `id` > 464777 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000475s ]
  13. SELECT * FROM `article` WHERE `id` < 464777 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000737s ]
  14. SELECT * FROM `article` WHERE `id` < 464777 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000812s ]
  15. SELECT * FROM `article` WHERE `id` < 464777 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000796s ]
0.102391s