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| 河北滨海盐碱区暗管改碱技术的降雨有效性评价 | |
| 引用本文： | 马凤娇,谭莉梅,刘慧涛,于淑会,刘宏娟,元媛,刘金铜.河北滨海盐碱区暗管改碱技术的降雨有效性评价[J].中国生态农业学报,2011,19(2):409-414. |
| 作者姓名： | 马凤娇 谭莉梅 刘慧涛 于淑会 刘宏娟 元媛 刘金铜 |
| 作者单位： | 1. 中国科学院遗传与发育生物学研究所农业资源研究中心,石家庄050022;中国科学院研究生院,北京100049 2. 中国科学院遗传与发育生物学研究所农业资源研究中心,石家庄050022;中国科学院地理科学与资源研究所,北京,100101 3. 中国科学院遗传与发育生物学研究所农业资源研究中心,石家庄,050022 |
| 基金项目： | 国家科技支撑计划项目(2009BAC55B04)资助 |
| 摘 要： | 在河北滨海盐碱荒地和盐碱低产田开展暗管改碱技术面临淡水资源严重短缺、灌溉条件差的问题,降水资源的利用对于该区域暗管改碱技术实施效果的影响很大。本文以河北省黄骅市为研究区域, 对河北滨海盐碱区的降水特征及其对暗管改碱技术的影响进行分析。结果表明: 当土壤含盐量<0.3%时, 年内次降水量可完全满足土壤初次淋洗脱盐过程需要; 当土壤盐分含量>0.3%但<0.5%时, 在较容易淋洗的土壤上, 暗管埋深合适时, 脱盐需要的次降水量仍可基本满足; 但当土壤含盐量达到0.5%左右时, 仅靠自然降水不能保证土壤脱盐需要。暗管埋设条件下, 雨季(6~9 月)降水量对大面积的轻度盐碱地淋洗脱盐效果非常显著; 但重度盐碱地却不能达到理想脱盐效果。从年降水量的变化情况看, 研究区域降水量逐年降低的趋势比较明显, 干旱年份多于洪涝年份, 且旱情较为严重。因此未来推广实施暗管改碱工程时有必要考虑亏缺灌溉对自然降水淋盐的补充效果。 |
| 关 键 词： | 滨海盐碱区 河北省 暗管改碱 降雨 淋洗 脱盐 有效性评价 |
| 收稿时间： | 7/2/2010 12:00:00 AM |
| 修稿时间： | 2010/12/9 0:00:00 |
Evaluation of the rainfall effectiveness for reclaim of saline soil by subsurface pipe drainage system in coastal saline regions of Hebei Province |
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| MA Feng-Jiao,TAN Li-Mei,LIU Hui-Tao,YU Shu-Hui,LIU Hong-Juan,YUAN Yuan and LIU Jin-Tong.Evaluation of the rainfall effectiveness for reclaim of saline soil by subsurface pipe drainage system in coastal saline regions of Hebei Province[J].Chinese Journal of Eco-Agriculture,2011,19(2):409-414. | |
| Authors: | MA Feng-Jiao TAN Li-Mei LIU Hui-Tao YU Shu-Hui LIU Hong-Juan YUAN Yuan and LIU Jin-Tong |
| Institution: | Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang 050022, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China;Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang 050022, China; Institute of Geographical Sciences and Natural Resources, Chinese Academy of Sciences, Beijing 100101, Ch;Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang 050022, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China;Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang 050022, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China;Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang 050022, China;Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang 050022, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China;Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang 050022, China |
| Abstract: | Shortage of fresh water and bad irrigation facilities limited reclamation of saline soil by using subsurface pipe drainage system in coastal regions of Hebei Province with saline-alkali wastelands and low-yield farmlands. This made the utilization of rainfall a significant production practice in the region. Using Huanghua City as a case, this paper analyzed the rainfall features and effects of rainfall on the subsurface pipe drainage for saline soil reclamation in the coastal saline regions of Hebei Province. The study showed that at soil salt content below 0.3%, precipitation induced soil leaching and absolute desalinization. At soil salt content above 0.3% and below 0.5%, precipitation only induced soil leaching and desalinization when pipes were buried at proper depths and soils readily leachable. At soil salt contents above 0.5%, soil leaching and desalinization never occurred under whatever precipitation level. Under the current pipe conditions, precipitation in rain season of June through September induced significant leaching of slight saline-alkali soils. In severe saline-alkali soil regions, precipitation in the rainy season was not sufficient to leach and desalinize the soils. Based on rainfall analysis, there was a decreasing trend in annual precipitation. The frequency of drought also increased against that of flood. Application of long-term subsurface pipe drainage for saline soil reclamation should consider deficit irrigation to supplement rainfall and induce leaching in saline-alkali soils. |
| Keywords: | Coastal saline region Hebei Province Subsurface pipe drainage for saline soil reclaim Rainfall Leach Desalinization Effectiveness evaluation |
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