水土保持学报2018，Vol.32Issue(2)：306-311,6.DOI:10.13870/j.cnki.stbcxb.2018.02.045
枯草芽孢杆菌对盐碱土面蒸发及水盐分布的影响
Effects of Bacillus subtilis on Evaporation of Soil Surface and Water and Salt Dsitritution in Saline-alkali Soil
摘要
Abstract
In this paper,five different contents of Bacillus subtilis (0,1,3,5,7 g/kg) were setted,aimed to study the effect of B.subtilis on evaporation of soil surface and water and salt distribution in saline-alkali soil.The results showed that:(1) With the application of B.subtilis,the cumulative evaporation and evaporation rate in saline-alkali soil decreased obviously,comparing to that in control soil columns,especially after the initial 2 days.The cumulative evaporation and evaporation rate of soil with different B.subtilis content (0,1,3,5,7 g/kg) was smaller than that without B.subtilis application,and reached smallest when B.subtilis content was 3 g/kg.In the 41st day after evaporation,the cumulative evaporation of treatments with 1,3,5 and 7 g/kg B.subtilis were decreased by 16.63％,21.39％,11.26％ and 5.96％ compared with that in 0 g/kg,and the variations between the treatments were significant (P＜0.05).(2) Both Black and Rose model could fit soil evaporation process well with different B.subtilis contents.For the Black evaporation model,with the increase of B.subtilis contents,evaporation parameter B firstly decreased and then increased compared with the control treatment (P＜0.05).For the Rose evaporation model,with the increase of B.subtilis contents,stable evaporation parameters C and moisture diffusion parameter D firstly decreased and then increased,which were obviously less than the treatment received 0 g/kg B.subtilis (P＜ 0.05).When the B.subtilis was 3 g/kg,the minimum values of C and D were obtained,which further confirmed that B.subtilis could increase soil water holding capacity.When the B.subtilis content were 1,3,5 and 7 g/kg,the water contents were greater than that in the control.(3) At the depth of 6 cm,the water content in the treatments with B.subtilis of 1,3,5 and 7 g/kg increased by 28.24％,37.40％,20.00％,6.87 ％ respectively,compared with that in the control.(4) Soil salt contents were also significantly decreased with the application of B.subtilis.The salt content in the treatments with B.subtilis of 1,3,5 and 7 g/kg decreased by 32.26％,46.89％,26.34％,14.65％ respectively,compared to that in the control.(5) After applying B.subtilis,the soil residual water content θr,saturated water content θs and coefficient associated with intake value α were all increased and shape coefficient n was decreased in van Genuchten equation.In summary,application of 3 g/kg B.subtilis could inhibit salt and improve soil water holding capacity in saline-alkali.关键词
枯草芽孢杆菌/盐碱土/蒸发/水盐分布/水分特征曲线Key words
Bacillus subtilis/saline-alkali soil/evaporation/water and salt distribution/soil water characteristic curve分类
农业科技引用本文复制引用
侯亚玲,周蓓蓓,王全九..枯草芽孢杆菌对盐碱土面蒸发及水盐分布的影响[J].水土保持学报,2018,32(2):306-311,6.基金项目
国家自然科学基金重点项目(51239009,41371239) （51239009,41371239）
陕西省科技支撑项目(2013KJXX-38) （2013KJXX-38）
西安理工大学特色研究计划项目(2016TS013) （2016TS013）
