LIU Lu,ZHANG Qingwen,PAN Yinghua,et al.Effects of Soil Amendments on Hydraulic Conductivity of Salinized Chao Soil[J].Research of Soil and Water Conservation,2019,26(03):66-71.
改良剂对盐化潮土饱和导水率的影响
- Title:
- Effects of Soil Amendments on Hydraulic Conductivity of Salinized Chao Soil
- Keywords:
- salinized chao soil; saturated hydraulic conductivity; polyacrylamide; bamboo charcoal organic compound fertilizer; bacteria organic compound fertilizer
- 分类号:
- S152
- 摘要:
- 土壤导水性是影响土壤水分入渗、淋溶等过程的重要性质，而饱和导水率是在土壤为水饱和后影响土壤渗透能力、地表径流发生程度、盐分淋洗状况的重要参数。以室内土柱试验为主要手段，以盐化潮土为研究对象，探究聚丙烯酰胺（PAM）、竹炭型土壤调理剂（BC）、菌型有机复合肥（BO）对盐化潮土饱和导水率的影响。（1）盐化潮土饱和导水率随着BC用量增加而增大，BC用量为20 g/kg时盐化潮土饱和导水率为0.041 cm/min，较CK增加32.3%；盐化潮土的饱和导水率随PAM用量的增加而减小，PAM施用量为1 g/kg土壤饱和导水率为0.0127 cm/min，较CK降低59.0%；文中选取的BO各处理对土壤饱和导水率的影响效果较小，各用量间无显著差异。（2）与CK相比，BC和BO各处理所需的渗透时间均较短，7 h的累计出流量较大；PAM各处理所需的渗透时间较长，7 h的累计出流量较小。不同改良剂对盐化潮土导水性能的作用效果不同，本研究可为改良剂的选择与用量提供数据支持。
- Abstract:
- Soil Hydraulic conductivity is an important characteristic which affects soil water infiltration, leaching process and so on. And saturated hydraulic conductivity is the one of soil water parameters which influences soil infiltration capacity, surface runoff, salt leaching. In this paper, with the indoor soil column experiments and salinized chao soil, the effects of different soil amendments such as polyacrylamide (PAM), bamboo charcoal soil conditioner (BC) and bacterial organic compound fertilizer (BO) on soil water conductivity was investigated. The results show that:(1) the saturated hydraulic conductivity of salinized chao soil increases with the increase of BC dosage; when BC dosage is 20 g/kg, the saturated hydraulic conductivity of salinized chao soil is 0.041 cm/min, which is 32.3% higher than CK; the saturated hydraulic conductivity of soil decreases with the increase of PAM dosage; The PAM application rate is 1 g/kg, soil saturated hydraulic conductivity is 0.012 7 cm/min, which is 59.0% lower than CK; the BO treatment selected in this paper is saturated with soil, the effect of water rate is small, and there is no significant difference between the amounts; (2) compared with CK, the permeation time required for each treatment of BC and BO is shorter, and the cumulative outflow at 7 hours is larger; the permeation time required for each treatment of PAM is longer, and the cumulative outflow at 7 hours is smaller. Different amendments have different effects on the water conductivity of salinized chao soil. This study can provide data support for the selection and dosage of soil modifiers.
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备注/Memo
收稿日期:2018-10-19;改回日期:2018-12-05。
基金项目:国家水体污染控制与治理科技重大专项（2015ZX07203-007）；山东省高等学校优势学科人才团队培育计划：“蓝黄两区滨海资源与环境团队”项目；山东省自然科学资助项目（ZR2013DM010）
作者简介:刘璐(1992-),女,山东潍坊人,硕士研究生,研究方向:区域水土资源利用与调控研究。E-mail:liulu110143@163.com
通讯作者:张晴雯(1975-),女,宁夏中宁人,博士,研究员,主要从事农业面源污染物迁移转化及调控研究。E-mail:zhangqingwen@caas.cn;潘英华(1973-),女,黑龙江讷河人,博士,教授,主要从事区域水土资源利用与调控研究。E-mail:panxingxing@126.com