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农业科普:土壤的分类及功能

  • 2026-03-27 20:25:35
农业科普:土壤的分类及功能

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观察土壤

①土壤的含义及组成
利用视频和图片，依次介绍土壤的概念、分类以及组成特点。

②土壤的质地、颜色及分布

通过土壤分布图和土壤景观图片，介绍不同土壤的质地、颜色、发育条件和地区分布。
③土壤剖面探究

通过土壤剖面图，介绍土壤的垂直分层情况，并通过森林和草原的剖面图，对比两者土壤剖面的特点。

土壤的形成

①风化作用与土壤形成

通过视频，介绍风化作用对土壤形成的影响。
②探究影响土壤形成的其他因素

依次介绍成土母质的影响、气候中气温和降水、生物、时间以及人类活动对土壤形成的影响。谭老师地理工作室综合整理

③直观演示土壤形成过程
通过一组示意图，展示土壤形成过程中各个要素的影响。

土壤的功能

①土壤的功能和作用
利用景观图说明土壤的功能和作用，主要包括保水、蓄水、生产等功能。

来源：农业应用技术

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  1. CONNECT:[ UseTime:0.000397s ] mysql:host=127.0.0.1;port=3306;dbname=h_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000582s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000335s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000263s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000491s ]
  6. SELECT * FROM `set` [ RunTime:0.000241s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000501s ]
  8. SELECT * FROM `article` WHERE `id` = 496629 LIMIT 1 [ RunTime:0.000416s ]
  9. UPDATE `article` SET `lasttime` = 1774782421 WHERE `id` = 496629 [ RunTime:0.001634s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.001699s ]
  11. SELECT * FROM `article` WHERE `id` < 496629 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000397s ]
  12. SELECT * FROM `article` WHERE `id` > 496629 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001244s ]
  13. SELECT * FROM `article` WHERE `id` < 496629 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000779s ]
  14. SELECT * FROM `article` WHERE `id` < 496629 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001229s ]
  15. SELECT * FROM `article` WHERE `id` < 496629 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000709s ]
0.103102s