摘要
该研究旨在探讨以植穴控制体作为调控水分运移的基本单元,以提高盐渍土造林成效及土地使用价值。结合土柱微宇宙试验控制技术,选取植穴控制体(PHCB)的结构因子(木本植物、植穴袋材料、覆膜材料配比、填充材料配比及填料厚度)和环境因子(地下水矿化度、土壤质地、补水量)为影响因素,设计U12(12×43×34)的混合均匀试验。经回归分析筛选出PHCB最佳结构设计参数,建立植穴控制体结构因子和环境因子与含水率间关系的预测方程。分析结果显示:当每次补水量达到5.06mm,土壤质地为轻黏土的环境条件下,木本植物选择紫叶李、植穴袋材料为麻布、PVA(polyvinyl alcohol)/VAE(vinyl acetate-ethylene copolymer emulsion)/蒙脱石的体积比按100︰20︰10配制成覆膜材料,秸秆、枯枝落叶和木屑以质量比1︰1︰2混合制成填料,可使植穴袋内的土壤含水率提高48.83%。而环境因子的地下水矿化度及结构因子填料厚度对植穴内水分运移的影响均不显著。PHCB可以有效调控盐渍土水分运移过程,是一种盐渍土生态修复方法。
In order to make a plant hole into a basic unit to regulate soil water movement,improve the forestation survival rate and land-using value of saline soil,the authors selected structure factors（including woody plant,material used for planting-hole bag,dispensation radio of membrane material,dispensation radio and thickness of filling material） of planting hole control body（PHCB） and environment factors（including groundwater mineralization,soil texture and supplementary water capacity） as influencing factors,combined microcosm experiment technology,and used a hybrid homogeneous design U12（12×4^3×3^4） to arrange the experiments for obtaining the optimal configuration parameters and establishing a predictive equation which could show the relationships between influencing factors and soil moisture. The results of regression analysis indicated that：on condition that the supplementary water capacity was up to 5.06 mm,and light clay soil as soil texture,prunus cerasifera as woody plant,linen used for material of the plant hole,membrane material made of PVA（polyvinyl alcohol） ,VAE（vinyl acetate-ethylene copolymer emulsion） and montmorillonite with volume ratio of 100︰20︰10,and filler made from straw,litter and wood chips with mass ratio of 1︰1︰2,soil moisture could be increased 48.83% inside the planting hole. While the groundwater mineralization and thickness of filler material were not significant influences on water movement in the plant hole. PHCB is able to be used to regulate the process of soil water movement effectively,which is a method for ecological restoration of saline soil.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2010年第3期32-37,共6页
Transactions of the Chinese Society of Agricultural Engineering
基金
天津科技支撑计划重点项目(08ZCGYSF02500)
关键词
土壤水分
回归分析
滨海区
生态
修复
盐渍土
植穴控制体
微宇宙
soil moisture
regression analysis
coastal zones
ecology
restoration
saline soil
planting hole control body（PHCB）
microcosm
作者简介
文科军（1957-），男，江西永新人，博士，教授，主要从事水土污染控制与生物修复研究。天津天津城市建设学院环境与市政工程系，300384。Email：wenkejun@126．com
通信作者：杨栩（1983-），男，浙江诸暨人，主要研究方向：水土环境的生态修复工程。天津天津城市建设学院环境与市政工程系，300384。Email：yangxu1009@163.com
