保水剂种类及含量对土壤水分蒸发的影响  

Effects of water-retaining-agents species and concentrations on water evaporation quantity of soil

作　　者：王宇[1] 叶建仁[1] 

机构地区：[1]南京林业大学森林资源与环境学院,江苏南京210037

出　　处：《南京林业大学学报（自然科学版）》2008年第4期95-97,共3页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：国家"十一五"科技支撑专题(2006BAD08A1002)

摘　　要：通过室内模拟试验,研究了保水剂种类及施用浓度对土壤水分蒸发量的影响。结果表明,经过不同类型保水剂处理后,各处理土壤的水分蒸发量均随干旱胁迫时间的延长呈先上升后下降的变化趋势,且经过保水剂处理的土壤的水分蒸发量始终低于对照;各保水剂处理中,kh型保水剂处理后土壤的水分蒸发量始终比其他几种保水剂处理的低。在施用浓度上,保水剂质量分数为0.5%和0.3%两处理对土壤保持水分起较好效果,高浓度的保水剂反而不利于土壤水分的保持。说明施用保水剂能够有效地抑制土壤水分蒸发,且只有在生产中施用合适含量的保水剂才能充分发挥其保水效果。Based on the simulation tests, effects of water-retaining-agents and its concentrations on moisture evaporation in the soil were studied in lab. The results showed that moisture evaporation treated by different species of water- retaining-agents increased firstly, and then declined with water stress degree time extended. The moisture-preserved capacity of soil, treated by water-retaining-agents, became stronger than that without water-retaining-agents. Among all water-retaining-agents, the effect of ＂Kehan 98＂ was the best in reducing the evaporation during the whole process. Among 4 water-retaining-agents, the effect of treatment of 0.5% and 0.3% were better than the others. On the contrary, water-retaining-agents in high concentration was against moisture-preserved capacity in soil. The results showed that the water-retaining-agents could improve strong the moisture-preserved capacity in soil effectively. Only right concentration could make the water-retaining-agents work adequately.

关 键 词：保水剂 土壤水分蒸发 干旱胁迫 

分 类 号：S714.2[农业科学—林学] S152