不同灌溉施肥模式下土壤湿胀干缩特征曲线及其滞后效应
采用淹灌、间歇灌2种灌溉模式与不施氮肥、含氮复合肥、缓控释氮肥、有机无机氮肥4种施肥模式配成8个处理开展水稻种植田间试验,研究了不同灌溉施肥模式下土壤湿胀干缩特征曲线及其滞后效应。结果表明：指数模型能较好地描述不同灌溉施肥模式下的土壤收缩过程与土壤膨胀过程;各模式下土壤干缩特征曲线与湿胀特征曲线指数模型中的a值（干土的比容积,即干土体积质量的倒数）和b值（单位含水量变化时土壤比容积变化的自然对数单位值）存在差异;土壤干缩曲线与湿胀曲线不完全重合,二者的b值及其差异也不同,存在滞后现象;土壤湿胀干缩效应受多种土壤性质的影响,其中主要通过土壤孔隙结构与持水性质的影响体现。...
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| Published in | 农业工程学报 Vol. 29; no. 11; pp. 78 - 84 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
水资源与水电工程科学国家重点实验室,武汉 430074%武汉理工大学机电工程学院,武汉 430070%江西省灌溉试验中心站,南昌 330096
2013
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1002-6819 |
| DOI | 10.3969/j.issn.1002-6819.2013.11.010 |
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| Abstract | 采用淹灌、间歇灌2种灌溉模式与不施氮肥、含氮复合肥、缓控释氮肥、有机无机氮肥4种施肥模式配成8个处理开展水稻种植田间试验,研究了不同灌溉施肥模式下土壤湿胀干缩特征曲线及其滞后效应。结果表明：指数模型能较好地描述不同灌溉施肥模式下的土壤收缩过程与土壤膨胀过程;各模式下土壤干缩特征曲线与湿胀特征曲线指数模型中的a值（干土的比容积,即干土体积质量的倒数）和b值（单位含水量变化时土壤比容积变化的自然对数单位值）存在差异;土壤干缩曲线与湿胀曲线不完全重合,二者的b值及其差异也不同,存在滞后现象;土壤湿胀干缩效应受多种土壤性质的影响,其中主要通过土壤孔隙结构与持水性质的影响体现。 |
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| AbstractList | S123; 采用淹灌、间歇灌2种灌溉模式与不施氮肥、含氮复合肥、缓控释氮肥、有机无机氮肥4种施肥模式配成8个处理开展水稻种植田间试验,研究了不同灌溉施肥模式下土壤湿胀干缩特征曲线及其滞后效应.结果表明:指数模型能较好地描述不同灌溉施肥模式下的土壤收缩过程与土壤膨胀过程;各模式下土壤干缩特征曲线与湿胀特征曲线指数模型中的a值(干土的比容积,即干土体积质量的倒数)和b值(单位含水量变化时土壤比容积变化的自然对数单位值)存在差异;土壤干缩曲线与湿胀曲线不完全重合,二者的b值及其差异也不同,存在滞后现象;土壤湿胀干缩效应受多种土壤性质的影响,其中主要通过土壤孔隙结构与持水性质的影响体现. 采用淹灌、间歇灌2种灌溉模式与不施氮肥、含氮复合肥、缓控释氮肥、有机无机氮肥4种施肥模式配成8个处理开展水稻种植田间试验,研究了不同灌溉施肥模式下土壤湿胀干缩特征曲线及其滞后效应。结果表明：指数模型能较好地描述不同灌溉施肥模式下的土壤收缩过程与土壤膨胀过程;各模式下土壤干缩特征曲线与湿胀特征曲线指数模型中的a值（干土的比容积,即干土体积质量的倒数）和b值（单位含水量变化时土壤比容积变化的自然对数单位值）存在差异;土壤干缩曲线与湿胀曲线不完全重合,二者的b值及其差异也不同,存在滞后现象;土壤湿胀干缩效应受多种土壤性质的影响,其中主要通过土壤孔隙结构与持水性质的影响体现。 |
| Abstract_FL | Farmland soil is often in alternating wet and dry state, which seriously affected the change of soil composition and properties, and thus changed soil hydraulic properties. During the course of alternation of wetting and drying, along with the change of water content, soil bulk density would change accordingly. The experimental investigations of this paper were carried out in irrigation field of Jiangxi province irrigation experiment station. The rice planting field trials were launched by employing experimental treatment with two irrigation modes including flooding, intermittent irrigation and four fertilization mode including no nitrogen fertilizer, nitrogen-containing compound fertilizer, controlled-release nitrogen fertilizer, organic and inorganic nitrogen fertilizer. Through analyzing change of soil specific volume with water content of all the tested soil undisturbed soil, the method of statistical analysis was used to fit the soil quality index curve model of water content and soil specific volume relationship. And main influence factors of soil wetting expansion and drying shrinkage were obtained by gray correlation analysis. The results showed that the index model can be used to describe the soil expansion process and shrinkage process under different irrigation and fertilization modes. a (dry soil, reciprocal of dry soil volume mass) and b (the natural logarithm unit value of soil specific volume change when unit water content change) values in soil shrinkage characteristics curve index models of different irrigation and fertilization mode were not the same with responding expansion curve index models. Soil shrinkage curve and expansion curve were two mutually non-coincident curves, b values and their differences in two curves were also different and lag phenomenon was existed. Soil wet expansion and dry shrinkage characteristics were affected by a variety of soil properties, which was mainly reflected through the effect of pore structure in soil and water holding properties. |
| Author | 陈祯 崔远来 刘方平 |
| AuthorAffiliation | 水资源与水电工程科学国家重点实验室,武汉430074 武汉理工大学机电工程学院,武汉430070 江西省灌溉试验中心站,南昌330096 |
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| DocumentTitleAlternate | Soil wet expansion and dry shrinkage characteristic curve and hysteresis effect under different irrigation and fertilization mode |
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| Keywords | 滞后效应 wet expansion and dry shrinkage 灌溉 irrigation 湿胀干缩特征曲线 hysteresis effect 肥料 soils 水稻土 fertilizer 土壤 paddy |
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| Notes | 11-2047/S Chen Zhen, Cui Yuanlai, Liu Fangping （1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan 430074, China; 2. School of Mechanical and Electronic Engineering of Wuhan University of Technology, Wuhan 430070, China; 3. Jiang Xi Province Irrigation Experiment Station, Nanehang 330096, China） Farmland soil is often in alternating wet and dry state, which seriously affected the change of soil composition and properties, and thus changed soil hydraulic properties. During the course of alternation of wetting and drying, along with the change of water content, soil bulk density would change accordingly. The experimental investigations of this paper were carried out in irrigation field of Jiangxi province irrigation experiment station. The rice planting field trials were launched by employing experimental treatment with two irrigation modes including flooding, intermittent irrigation and four fertilization mode including no nitrogen fertilizer, nitrogen-containing compound fertil |
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| SubjectTerms | 土壤 水稻土 湿胀干缩特征曲线 滞后效应 灌溉 肥料 |
| Title | 不同灌溉施肥模式下土壤湿胀干缩特征曲线及其滞后效应 |
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