生物质炭对盐土改良效应研究

采用小麦、糜子连续盆栽种植试验方法,研究了添加不同用量的生物质炭后,盐土中基础养分含量、Ph值、阳离子交换量、水溶性盐及其他盐分离子含量的变化,以期为生物质炭在盐土改良中的应用提供参考.结果表明:随生物质炭用量的增加,盐土中有机碳含量明显提高,矿质态氮、有效磷及速效钾变化很小；Ph值略有降低,但各处理间差异不显著；阳离子交换量大幅度增加；水溶性盐含量降低明显,其中Na+、K+、Mg2+及Ca2+降低幅度较大,C1-和SO42-含量也显著降低.在该盆栽试验中,生物质炭对盐土具有良好的改良效果.

Effects of biochar on saline soil improvement

By planting wheat and proso continually, a pot experiment was conducted to evaluate the changes of basic nutrient content, pH value, cation exchange capacity, water-soluble salts and other salt ions after adding different amount of biochar to the saline soil. The results showed that: with the amount of biochar increasing, the content of organic carbon in the saline soil was significantly improved, while the mineral nitrogen, available phosphorus and available potassium changed very little; the pH value was slightly lowered, but there was no significant differences among the treatments; the CEC increased substantially; the content of soluble salts decreased significantly, especially for Na⁺, K⁺, Mg²⁺ and Ca²⁺, and the content of Cl^- and SO₄^2- also decreased remark ably. In conclusion, the saline soil was improved effectively by the biochar.