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| 黄土高原不同降水类型区林地、草地与农田土壤干燥化效应比较 | |
| 引用本文： | 李军,陈兵,李小芳,赵玉娟,次仁央金,蒋斌,胡伟.黄土高原不同降水类型区林地、草地与农田土壤干燥化效应比较[J].土壤学报,2008,45(1):40-49. |
| 作者姓名： | 李军 陈兵 李小芳 赵玉娟 次仁央金 蒋斌 胡伟 |
| 作者单位： | 1. 西北农林科技大学农学院,陕西杨凌,712100;中国科学院水利部水土保持研究所,陕西杨凌,712100 2. 西北农林科技大学农学院,陕西杨凌,712100;海南农垦科技创新中心,海口,570206 3. 西北农林科技大学农学院,陕西杨凌,712100 4. 西北农林科技大学资源环境学院,陕西杨凌,712100 |
| 基金项目： | 国家自然科学基金项目（40371077和30471024）资助 |
| 摘 要： | 黄土高原人工林草地和旱作农田土壤干燥化问题十分突出,严重威胁着人工植被建设成效和旱作农业可持续发展。通过对黄土高原半湿润区、半干旱区和半干旱偏旱区53类林地、草地和农田深层土壤湿度的观测,分析比较了各类型区各类林地、草地和农田土壤湿度、土壤水分过耗量、土壤干燥化指数、土壤干层厚度等土壤干燥化效应指标。结果表明:(1)林地、草地和农田土壤湿度平均值依次为6.46%～12.57%、6.49%～11.52%和9.32%～16.00%,均以半湿润区最高,半干旱区居中,半干旱偏旱区最低,林地、草地和农田土壤水分过耗量平均值分别为521mm、491mm和30mm,林地土壤水分过耗量以半干旱区最高,草地以半湿润区和半干旱偏旱区最高,农田以半干旱偏旱区最高;(2)林地、草地和农田土壤干燥化指数平均值依次为39%、42%和96%,分别属于严重干燥化、严重干燥化和轻度干燥化强度,林地土壤干燥化程度以半干旱区和半干旱偏旱区最严重,草地以半湿润区和半干旱偏旱区最严重,农田以半干旱偏旱区最严重,林地、草地和农田土壤干层厚度平均值依次为881cm、836cm和336cm,林地土壤干层厚度以半干旱区和半干旱偏旱区最厚,草地和农田以半干旱偏旱区最厚。 |
| 关 键 词： | 黄土高原 林地 草地 农田 土壤湿度 土壤干燥化 土壤干层 |
| 收稿时间： | 2006-09-15 |
| 修稿时间： | 2007-01-19 |
SOIL DESICCATING EFFECTS OF FORESTLANDS,GRASSLANDS AND CROPLANDS IN ZONES DIFFERENT IN RAINFALL PATTERN ON THE LOESS PLATEAU |
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| Li Jun,Chen Bing,Li Xiaofang,Zhao Yujuan,Ciren Yangjin,Jiang Bin and Hu Wei.SOIL DESICCATING EFFECTS OF FORESTLANDS,GRASSLANDS AND CROPLANDS IN ZONES DIFFERENT IN RAINFALL PATTERN ON THE LOESS PLATEAU[J].Acta Pedologica Sinica,2008,45(1):40-49. | |
| Authors: | Li Jun Chen Bing Li Xiaofang Zhao Yujuan Ciren Yangjin Jiang Bin and Hu Wei |
| Institution: | Li Jun1,2 Chen Bing1,4 Li Xiaofang1 Zhao Yujuan3 Ciren Yangjin1 Jiang Bin3 Hu Wei1(1 College of Agronomy,Northwest A&F University,Yangling,Shaanxi 712100,China)(2 Institute of Soil , Water Conservation,CAS , MWR,China)(3 College of Resources , Environment,China)(4 Scientific , Technological Innovation Center of Farm Management of Hainan,Haikou 570206,China) |
| Abstract: | Soil desiccation is a prominent in artificial forestlands,grasslands and croplands on the Loess Plateau,seriously threatening the effects of revegetation and sustainable development of dryland farming.Based on observation of soil moisture in deep soil layers in 53 different kinds of forestlands,grasslands and croplands in semi-humid zone,semi-arid zone and semi-arid/arid zone of the Loess Plateau,soil moisture contents,soil water overuse rate,soil desiccation indexes and thickness of desiccated soil layers ... |
| Keywords: | The Loess Plateau Forestland Grassland Cropland Soil moisture Soil desiccation Desiccated soil layer |
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