摘要
针对山西省大同盆地干旱、半干旱性气候下的苏打盐化土,采用山西灵石风化煤作为改良材料进行田间试验,研究了风化煤不同施用量情况对土壤p H、电导率（EC）、碱化度（ESP）和作物生物量的影响。试验结果表明：0~10 cm表层土壤p H相对降低率随风化煤施用量的加大呈规律性增加,10 cm以下土壤p H并未表现出显著性增加。土壤电导率（EC）和碱化度（ESP）在施用风化煤量不大的情况下与对照相比并未表现出显著性差异,当风化煤施用量达到60 t/hm2的情况下,EC和ESP显著降低。风化煤施用量在60 t/hm2的情况下,土壤0~10、10~20、20~40 cm土层p H相对降低率分别为8.9%、5.3%、2.5%,0~10 cm表层土壤的EC值降低了0.13 m S/cm,同时土壤的ESP从26%下降到13%。结果表明,在山西大同盆地苏打盐化土改良中,风化煤的最佳施用量为60 t/hm2。
Aiming at soda-saline soil in Shanxi Datong basin under arid and semiarid climate conditions, Shanxi Lingshi weathered coal was used as modified material, field experiment was conducted, and soil pH, electrical conductivity （EC）, exchange sodium percentage （ESP） and crop biomass were measured under different application amounts of weathered coal. The results showed that the relative reduction rate of soil pH of 0-10 cm increased with the increase of the application amount of weathered coal, while soil pH below 10 cm had no significant increase. When the application amount of weathered coal was small, EC and ESP had no significant difference compared with that of CK. EC and ESP reduced significantly under the application amount of 60 t/hm^2. The relative reduction rate of soil pH of 1-10, 10-20 and 20-40 soil layers was 8.9%, 5.3% and 2.5% respectively under the application amount of 60 t/hm^2. EC reduced 0.13 mS/cm in the soil layer of 1-10 cm, and ESP reduced from 26% to 13%. The results showed that in the improvement of soda-saline soil in Shanxi Datong, the best application amount of weathered coal was 60 t/hm^2.
出处
《中国农学通报》
2015年第24期199-203,共5页
Chinese Agricultural Science Bulletin
基金
山西省构建新型农业社会化服务体系建设项目"雁门关生态畜牧区改碱-种草-循环农业社会化服务体系"
山西省农业综合开发项目"大同盆地盐碱地改良技术示范与推广"
山西省科技援疆项目"新疆盐碱土壤综合改良利用技术应用研究"(2014072003)
关键词
风化煤
苏打盐化土
大同盆地
土壤改良剂
weathered coal
soda-saline soil
Datong basin
soil conditioner
