Effects of Additives on Straw Decomposition and Its Surrounding Soil Environment Under Different Returning Depths

QU Xiaojing; SUN Dayan; WU Nan; ZHANG Chong; ZHANG Xiaofeng

doi:10.13870/j.cnki.stbcxb.2020.02.037

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Effects of Additives on Straw Decomposition and Its Surrounding Soil Environment Under Different Returning Depths

更新时间：2025-03-12

- Effects of Additives on Straw Decomposition and Its Surrounding Soil Environment Under Different Returning Depths
- Vol. 34, Issue 2, Pages: 261-268(2020)
- 作者机构：
  
  1. 吉林市农业科学院,吉林,吉林,132101
  2. 吉林省农业机械研究院,长春,130022
  3. 上海创博土壤修复工程有限公司,上海,201101
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2020.02.037
  CLC： S154
- Published：2020
- 稿件说明：
移动端阅览
QU Xiaojing, SUN Dayan, WU Nan, et al. Effects of Additives on Straw Decomposition and Its Surrounding Soil Environment Under Different Returning Depths[J]. 2020, 34(2): 261-268.
DOI：

QU Xiaojing, SUN Dayan, WU Nan, et al. Effects of Additives on Straw Decomposition and Its Surrounding Soil Environment Under Different Returning Depths[J]. 2020, 34(2): 261-268. DOI： 10.13870/j.cnki.stbcxb.2020.02.037.

摘要

探讨添加剂对秸秆腐解及其形成的土壤环境的影响，以明确促进秸秆腐解的同时，利于土壤固碳的添加剂最佳配方。以玉米秸秆为供试材料，进行了150天的田间原位埋袋腐解试验，对比研究3种类型添加剂（尿素、生物菌腐解剂和微量元素调理剂）对15，30 cm还田秸秆腐解过程及其形成的土壤环境因素的影响。结果表明：（1）添加剂极显著影响碳损失量（p<0.01），直接影响秸秆腐解程度及其释放碳素在土壤中的固持，还田深度则通过影响含水量影响失重，含水量与失重显著负相关（r=-0.51），SOC与碳损失量接近于线性负相关（r=-0.94），与C/N极显著正相关（r=0.72），C/N与碳损失量极显著负相关（r=-0.53）；（2）微量元素添加剂既提高了前期土壤的含水量，又减缓了后期水分的散失，但添加剂有加速土壤酸化的趋势，15 cm还田时微量元素添加剂表现更明显，30 cm还田时生物菌添加剂表现更明显；（3）添加剂加速了秸秆的腐解，但减少了碳损失量，150天时，15，30 cm还田其碳损失量平均值分别比对照减少3.4%和4.8%，有利于土壤固碳，其中，生物菌添加剂更有利于15 cm还田秸秆的腐解，氮素添加剂有利于30 cm还田秸秆的腐解；（4）添加剂减缓了秸秆腐解产物的流失，尤其是生物菌添加剂和微量元素添加剂，15 cm还田时生物菌添加剂有利于土壤固碳，微量元素添加剂更利于有机碳的更新，而30 cm还田时则相反。

Abstract

In order to explore the optimum additive formula that promotes straw decomposition and soil carbon sequestration

the effects of additives on the straw decomposition and its surrounding soil environment were studied. We chose corn stalks as test materials to carry out the burial bag in-situ decomposition experiment for 150 days. The effects of three types of additives (urea

biological bacteria decomposition accelerator and trace element conditioner) on the decomposing process of 15 cm and 30 cm depth returning straw and the soil environmental factors were studied. The results showed that:(1) Additives significantly affected the amount of carbon loss (p<0.01)

directly affecting the degree of straw decomposing and the release of carbon in the soil. The depth of returning to the field affected the weight loss by affecting the water content

and the water content was significantly negatively correlated with the weight loss (r=-0.51). SOC and carbon loss were close to a linear negative correlation (r=-0.94)

and SOC was significantly positively correlated with C/N (r=0.72)

and C/N was significantly negatively correlated with carbon loss (r=-0.53). (2) The trace element additive not only improved soil water content in the early stage

but also slowed the loss of water in the later stage. However

the additive had the tendency to accelerate soil acidification. The effect of trace element additive was more obvious at the depth of 15 cm

but the biological additive worked better at 30 cm depth. (3) The additives accelerated the decomposition of the straw but reduced the carbon loss. After 150 days

the average carbon loss of 15 cm and 30 cm depth returning to the field were reduced by 3.4% and 4.8%

respectively

which was conducive to soil carbon sequestration. Among them

the biological bacteria additive was more conducive to the decomposing of 15 cm returning straw

and the nitrogen additive was more conducive to the decomposing of 30 cm depth returning straw. (4) The additives slowed down the loss of the straw decomposing products

especially the biological bacteria additives and trace element. When the 15 cm depth returning field was used

the biological bacteria additive was more conducive to soil carbon sequestration

and the trace element additive was more conducive to the renewal of organic carbon

while the 30 cm depth returning was the opposite.

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