Effects of Bacillus subtilis on Evaporation of Soil Surface and Water and Salt Dsitritution in Saline-alkali Soil

HOU Yaling1; ZHOU Beibei1

doi:10.13870/j.cnki.stbcxb.2018.02.045

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Effects of Bacillus subtilis on Evaporation of Soil Surface and Water and Salt Dsitritution in Saline-alkali Soil

更新时间：2025-03-12

- Effects of Bacillus subtilis on Evaporation of Soil Surface and Water and Salt Dsitritution in Saline-alkali Soil
- Vol. 32, Issue 2, Pages: 306-311(2018)
- 作者机构：
  
  1. 西安理工大学西北旱区生态水利工程国家重点实验室培育基地,西安,710048
  2. 中国科学院水利部水土保持研究所，黄土高原土壤侵蚀与旱地农业国家重点实验室，陕西杨凌,712100
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2018.02.045
  CLC： S156.4;S152.7+3
- Published：2018
- 稿件说明：
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HOU Yaling1, ZHOU Beibei1. Effects of Bacillus subtilis on Evaporation of Soil Surface and Water and Salt Dsitritution in Saline-alkali Soil[J]. 2018, 32(2): 306-311.
DOI：

HOU Yaling1, ZHOU Beibei1. Effects of Bacillus subtilis on Evaporation of Soil Surface and Water and Salt Dsitritution in Saline-alkali Soil[J]. 2018, 32(2): 306-311. DOI： 10.13870/j.cnki.stbcxb.2018.02.045.

摘要

基于室内模拟土面蒸发试验和土壤持水性能试验，设置5种不同含量枯草芽孢杆菌（0，1，3，5，7 g/kg）处理，研究不同含量枯草芽孢杆菌对盐碱土面蒸发及水盐分布的影响。结果表明：（1）施加枯草芽孢杆菌后，土壤累积蒸发量、蒸发速率均显著降低，在蒸发开始后2天，枯草芽孢杆菌的保水性能显现，枯草芽孢杆菌含量为0，1，3，5，7 g/kg的累积蒸发量和蒸发速率均小于0 g/kg，在3 g/kg时累积蒸发量和蒸发速率最小，蒸发后41天，处理为1，3，5，7 g/kg累积蒸发量较0 g/kg分别减少了16.63%，21.39%，11.26%，5.96%，且不同处理间差异极显著（P＜0.05）。（2）枯草芽孢杆菌同样影响Black和Rose蒸发模型，对于Black蒸发模型，随着枯草芽孢杆菌含量的增大，蒸发参数B呈现先减后增的趋势，与0 g/kg相比较为显著（P＜0.05）；对于Rose蒸发模型，随着枯草芽孢杆菌含量的增大，稳定蒸发参数C和水分扩散参数D均呈现先减少后增大的趋势，其中在含量为3 g/kg时取得最小值，并且各处理差异性较为显著。（3）枯草芽孢杆菌能增加土壤的保水性能，在6 cm深度处，施加量为1，3，5，7 g/kg相比0 g/kg的剖面含水量分别增加了28.24%，37.40%，20.00%，6.87%。（4）枯草芽孢杆菌的添加使土壤的含盐量显著减少，枯草芽孢杆菌施加量为1，3，5，7 g/kg相比0 g/kg的处理分别降低了32.26%，46.89%，26.34%，14.65%。（5）当枯草芽孢杆菌含量为3 g/kg时，van Genuchten公式中土壤的滞留含水率θr、饱和含水率θs和与进气值有关的参数α最大，形状系数n最小，且各处理差异显著。综上，在盐碱土中施加3 g/kg的枯草芽孢杆菌，可使盐碱土壤抑盐，提高土壤的持水性能。

Abstract

In this paper

five different contents of Bacillus subtilis (0

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

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

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

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

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

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.

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