生物黑炭的施加对连云港滨海盐碱土的改良作用

为了了解生物黑炭的施入对连云港滨海盐碱土的改良效果，采用田间试验研究了生物黑炭施入量对盐碱土土壤性状及小麦温室气体排放量的影响。结果表明，生物黑炭施入对中度盐化滨海盐碱土具有改良作用，土壤pH从8．1降为7．78，同时土壤微生物生物量碳含量最高增加了81．80％。利用静态箱法测定了生物黑炭还田对小麦N2O排放的影响。结果表明，与单施化肥处理相比，添加8和32t·hm-2生物黑炭处理的麦田N2O的排放量分别降低了46．24％和48．39％。综上说明，生物黑炭施入对该研究选择的连云港滨海盐碱土具有改良作用，并且减少了麦田温室气体的排放，具有一定的生态环境效益。

Improvement of Biological BC in Coastal.Saline Soil of Lianyungang City

In order to understand the improvement of biological black carbon in the coastal saline soil of Lianyungang City, different biological black carbon was applied to the amount of saline-al- kali soil to test soil properties and wheat greenhouse gas emissions using field experiments meth- od. Results show that the selected moderate coastal saline soil salinization got ameliorated with the application of biological black carbon, the pH values of the soil dropped from 8.1 to 7.78, and the soil microbial biomass carbon content increased 81.80~ at most. Besides, the N20 emis- sions from biological BC imposed wheat field reduced by 48.39% compared with the single appli- cation of chemical fertilizer field. In conclusion, the application of biological black carbon can im- prove coastal saline soil of Lianyungang City, and reduce greenhouse gas emissions with environ- mental benefits.