土壤保水剂含量对喷播基质物理性质及抗冲性能的影响  

Influence of Water Holding Agent on Physical Properties and Anti-scour Ability of Spray Seeding Matrix

作　　者：王丽[1] 张金池[1] 张小庆[1] 李玥[1] 梦丽[1] 张波[1] 

机构地区：[1]南京林业大学森林资源与环境学院,南京210037

出　　处：《水土保持学报》2010年第2期79-82,共4页Journal of Soil and Water Conservation

基　　金：国家林业局“948”项目:破坏山体植被恢复长期维持技术引进(2008-4-40);江苏省社会发展项目:破坏山体植被恢复长期维持技术示范(BS200763)

摘　　要：通过盆栽试验研究保水剂含量对喷播基质物理性质及抗冲性能的影响。结果表明:不同保水剂含量处理中,保水剂含量与黑麦草出苗率及盖度、容重、孔隙度及抗冲性4种基质效应指标之间不是简单的线性关系,而是符合二次多项式的回归关系。随保水剂含量增加,黑麦草出苗率及盖度、基质孔隙度及抗冲指数呈现先增加后减小的变化趋势;而基质容重随着保水剂的增加而减少。说明保水剂对植物的生长和基质改良作用是在一定的含量范围内,否则就会产生负作用。基质结构转折点是保水剂含量为0.3%,但保水剂含量为0.30%时,黑麦草出苗率和盖度分别最高(55%和0.48),当保水剂含量超过0.3%以后,基质容重会明显偏低(小于0.9),基质的非毛管孔隙度和抗冲指数呈现明显下降趋势。因此,基质中保水剂含量应控制在0.3%以下,有利于形成良好的土壤基质结构,喷播基质具有较高保水效应的保水剂含量应在0.15%～0.30%之间。Effects of different water holding agent content on the physical properties and anti-scour ability of spray seeding matrix with a pot plant experiment.Results showed that its function was obviously different in different holding agent content.With increasing holding agent content,expect density reduced all along,the seeding rate,density,porosity and anti-scour ability were increased firstly and reduced.The relation with them not only sample linear relation,but was polynomial regress relation.It showed that the water holding agent can improve the spray seeding matrix in state range,or else can made negative function.The turning point was on 0.3% water holding agent content.Wile the water holding agent content was more than 0.3%,the spray seeding matrix wan on the low side obviously,and the porosity and anti-scour ability reduced obviously.So control the water holding agent content under 0.3% can be good for spray seeding matrix structure and among 0.15%～0.30%,spray seeding matrix has strong holding water effects.

关 键 词：喷播基质 保水剂 物理性质 抗冲性 

分 类 号：S152.5[农业科学—土壤学] S152.7[农业科学—农业基础科学]