| 红壤地区典型农田土壤水力学特性及土壤水库容研究 |
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| 引用本文： | 方堃,陈效民,张佳宝,黄晶,王伯仁,杜臻杰.红壤地区典型农田土壤水力学特性及土壤水库容研究[J].土壤通报,2010(1). |
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| 作者姓名： | 方堃 陈效民 张佳宝 黄晶 王伯仁 杜臻杰 |
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| 作者单位： | 南京农业大学资源与环境科学学院;农业部环境保护科研监测所;中国科学院土壤研究所;中国农科院祁阳红壤实验站; |
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| 基金项目： | 国家重点基础研究发展计划(973计划)(2005CB121103); 中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室开放课题(0751010015)资助 |
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| 摘 要： | 针对红壤地区普遍存在的季节性干旱问题,研究了红壤的水力学特性及土壤库容状况,结果如下:红壤旱地土壤各层的有效水含量变化不大,变化区间为61.00gkg-1～73.77gkg-1,作物可利用的有效水区间较小,不利于作物生长;水田中土壤剖面有效水含量变化明显,变化区间为75.27gkg-1～170.80gkg-1,其中表层和犁底层的有效水含量远大于其它各层次。土壤的饱和含水量主要受容重的影响,粘粒含量主要影响高吸力下的水田土壤含水量。旱地红壤表层总库容和死水库容较高,有效水库容较低,为17.71mm;水田土壤表层死水库容较小,有效水库较高,达到30.74mm。红壤季节性干旱的主要原因是土壤本身理化性质导致的有效水含量较低,难以被作物吸收利用。
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| 关 键 词： | 红壤 水力学特征 土壤库容 |
The Hydraulic Characteristics and Soil Reservoir of Typical Farmland in Red Soil Region |
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| FANG Kun ,CHEN Xiao-min ,ZHANG Jia-bao ,WANG Bai-ren ,HUANG Jing ,DU zhen-jie.The Hydraulic Characteristics and Soil Reservoir of Typical Farmland in Red Soil Region[J].Chinese Journal of Soil Science,2010(1). |
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| Authors: | FANG Kun CHEN Xiao-min ZHANG Jia-bao WANG Bai-ren HUANG Jing DU zhen-jie |
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| Institution: | FANG Kun 1,2,CHEN Xiao-min 1,ZHANG Jia-bao 3,WANG Bai-ren 4,HUANG Jing 4,DU zhen-jie 1 (1.College of Resources , Environmental Sciences,Nanjing Agricultural University,Nanjing 210095,China,2.Agro-Environmental Protection Institute,Ministry of Agriculture,Tianjin 300191,3.Institute of Soil Science,Chinese Academy of Sciences,Nanjing 21008,4.Red Soil Research Station,Chinese Academy of Agricultural Sciences,Qiyang,Hunan 426182,China.) |
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| Abstract: | Soil water content is an essential factor that can affect crop growth.In red soil region of China,the seasonal water shortage should be a mainly problem to agricultural development.Hydraulic characteristics and soil reservoir of red soil were studied in this paper to find out the reason of seasonal water shortage.The results were as follows:there were no obvious differences of available water content between different layers in soil profile of upland red soil,which variation range was from 61.00 to 73.77 g ... |
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| Keywords: | Red soil region Hydraulic characteristics Soil reservoir |
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