生物炭对盐碱土壤理化性质、生物量及玉米苗期生长的影响

发布时间：2018-03-07 06:16

本文选题：玉米秸秆　切入点：生物炭　出处：《江苏农业科学》2017年16期 　论文类型：期刊论文

【摘要】：采用实验室模拟和玉米盆栽种植试验相结合的方法,研究了添加不同用量的玉米秸秆生物炭后,盐碱土中基础养分含量、p H值、CEC含量、水溶性盐含量、土壤酶活性、微生物生物量及玉米苗期生长的变化,以期为玉米秸秆生物炭在盐碱土壤改良中的应用提供参考。结果表明,随着生物炭用量的增加,盐碱土壤中有机碳含量明显提高,是原土含量的1.35~1.51倍,矿质态氮、有效磷及速效钾含量变化较小;p H值降低幅度不大;水溶性盐含量降低明显;添加玉米秸秆生物炭能够显著提高土壤中阳离子交换量及酶活性;生物炭的加入显著提高了土壤微生物生物量,添加生物炭处理的土壤微生物生物量碳、氮含量分别比对照高6.50%~96.67%和42.86%~162.96%。同时,生物炭使土壤代谢熵分别降低了2.13%、8.51%、15.60%;生物炭能够促进玉米苗期的生长,对玉米株高、茎粗都有促进作用。总的来说,生物炭对盐碱土壤具有良好的改良效果。
[Abstract]:By means of laboratory simulation and pot planting experiment of maize, the content of basic nutrients (CEC), water soluble salt and soil enzyme activity in saline-alkali soil were studied after adding different amounts of corn straw biochar. The changes of microbial biomass and maize seedling growth in order to provide a reference for the application of corn straw biochar in the improvement of saline-alkali soil. The results showed that the organic carbon content in saline-alkali soil increased with the increase of the amount of biochar. The content of mineral nitrogen, available phosphorus and available potassium decreased slightly, the content of water soluble salt decreased obviously, and the addition of biochar from corn straw could significantly increase the cationic exchange capacity and enzyme activity in the soil. The addition of biochar significantly increased soil microbial biomass, and the nitrogen content of soil microbial biomass carbon increased by 6.50% 96.67% and 42.86%, respectively. Biochar reduced the soil metabolic entropy by 2.13% 8.51% 15.600.Biochar could promote the growth of maize seedlings, promote the plant height and stem diameter of maize. In general, biochar had a good effect on the improvement of saline-alkali soil.
【作者单位】：四川农业大学环境学院;
【基金】：四川省科技计划(编号:2014FZ0056)
【分类号】：S156.4;S513

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