| 黄淮海平原三种土壤中优势流现象的试验研究 |
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| 引用本文： | 程竹华,张佳宝,徐绍辉.黄淮海平原三种土壤中优势流现象的试验研究[J].土壤学报,1999,36(2):154-161. |
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| 作者姓名： | 程竹华 张佳宝 徐绍辉 |
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| 作者单位： | 中国科学院南京土壤研究所,南京,210008 |
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| 基金项目： | 中国科学院资助项目，49671041， |
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| 摘 要： | 在黄淮海平原选择三种不同质地类型的土壤（砂壤土、淤土、风沙土），各设１．５ｍ×１．５ｍ两个小区，其中一个小区在试验开始前两癸灌水约５６ｋｇ，以获得不同的初始含水量。将１００ｍｍ含有染色剂亮蓝的水灌入小区，一天之后，开挖１ｍ×１ｍ的剖面拍照，进行图像分析处理，计算剖面中染色百分比随深度的变异，研究所形成的优势流的状况与土壤类型、土壤初始含水量的关系。结果表明：不同土壤发生优势流的程度不同，结构发育好
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| 关 键 词： | 染色示踪剂 优势流 初始含水量 土壤 黄淮海平原 |
| 收稿时间： | 1998/2/23 0:00:00 |
| 修稿时间： | 1998-02-23 |
EXPERIMENTAL STUDIES ON PREFERENTIAL FLOW IN THREE SOILS IN HUNAG-HUAI-HAI PLAIN |
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| Cheng Zhu-hu,Zhang Jia-bao and Xu Shao-hui.EXPERIMENTAL STUDIES ON PREFERENTIAL FLOW IN THREE SOILS IN HUNAG-HUAI-HAI PLAIN[J].Acta Pedologica Sinica,1999,36(2):154-161. |
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| Authors: | Cheng Zhu-hu Zhang Jia-bao and Xu Shao-hui |
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| Institution: | Institute of Soil Science, Academia Sinica, Nanjing 210008;Institute of Soil Science, Academia Sinica, Nanjing 210008;Institute of Soil Science, Academia Sinica, Nanjing 210008 |
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| Abstract: | Three soils with different texture(sandy loam,eolian sand,warp clay) were selected in Huang-Huai-Hai Plain.Each treatment consisted of two 1.5m by 1.5m plots,one of which had been irrigated with about 56kg water two days before the dye experiment to achieve different initial water contents.Brilliant Blue was chosen as the dye tracer.One day after the irrigation,a vertical lm by lm soil profile was prepared.Photographs were taken for graphics analysis.And the relations between the occurrence of preferential flow and soil type,initial water content were studied.The results showed that susceptibility of different soils to preferential flow was different Structured soils were more prone to produce bypass flow.The initial water content had a pronounced effect in sandy loam soil and eolian sand soil and no effect in warp clay soil according to the deepest transport depth of the dye.The preferential transports of paclobutrazol and Cl- were carried on sandy loam soil.Cl- was detected at every site where preferential flow existed and had a much higher content than soil background content Paclobutrazol could also be detected even at the deepest transport depth of the dye. |
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| Keywords: | Dye tracer Preferential flow Initial water content |
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