北盘江三叠系飞仙关组紫色砂岩风化土壤保水性改良研究  

Study on Water Retention Improvement of Purple Sandstone Weathered Soil in Feixianguan Formation of Triassic in Beipanjiang

作　　者：刘丽[1] 魏晓 文雪峰[1] 彭益书 周发 杨昌隆 LIU Li;WEI Xiao;WEN Xue-feng;PENG Yi-shu;ZHOU Fa;YANG Chang-long(College of Agriculture,Guizhou University,Guiyang 550025,Guizhou China;College of Tea,Guizhou University,Guiyang 550025,Guizhou,China)

机构地区：[1]贵州大学农学院,贵州贵阳550025 [2]贵州大学茶学院,贵州贵阳550025

出　　处：《贵州地质》2022年第2期152-158,共7页Guizhou Geology

基　　金：国家自然科学基金项目(42167032、41473027);环境地球化学国家重点实验室开放课题(SKLEG2021212);贵州省自然科学基金项目(黔科合基础-ZK[2021]232)。

摘　　要：为厘清保水剂和生物炭对紫色土保水性的影响,通过室内土柱实验,设置添加保水剂和生物炭处理,研究不同处理对土壤吸水倍数、土壤水分蒸发率及保水性能的影响。结果显示不同改良措施均可提高紫色土的吸水倍数,保水剂对紫色土吸水倍数的提升比生物炭更加显著。施用保水剂可适当延缓紫色土的水分蒸发速率,然而施用生物炭则会促进紫色土水分的蒸发。绝大多数处理与空白对照(control check,CK)相比都能够不同程度改善紫色土的保水能力,而且高含量配比处理的改良效果明显优于低含量配比的处理,其中P2B2(0.3%的保水剂和3.0%的生物炭)处理可以使紫色土的保水性能达到最高。保水剂与生物炭利于低热河谷区紫色土的水分改良。本研究可为低热河谷区紫色土的水分管理提供参考。In order to understand the effect of water retention agent and biochar on the water retention of purple soil.The effects of different treatments on soil water absorption ratio,soil water evaporation rate and water retention performance were studied by indoor soil column experiment,adding water retaining agent and biochar treatment.The results showed that the water absorption ratio of purple soil was improved by different ameliorations,and the improvement of water retaining agent was more effective than that of biochar.Water retaining agent can delay the evaporation rate of purple soil,while the biochar can promote the evaporation rate of purple soil.Compared with control check(CK),most treatments can improve the water retention ability of purple soil to varying degrees,and the improvement effect of high content ratio treatment is obviously better than that of low content ratio treatment.P2B2(0.3%water retention agent and 3.0%biochar)treatment can make the purple soil achieve the highest water retention performance.Water retaining agent and biochar will benefit the water improvement of purple soil in low heat valley.This study can provide reference for water management of purple soil in low-heat valley.

关 键 词：北盘江 三叠系 飞仙关 土壤改良 砂岩风化 

分 类 号：S159[农业科学—土壤学]