摘要
为探究石膏对苏打盐碱土土壤理化性质的影响,通过室内模拟实验的方法,研究了土壤施用不同用量(0、0.6%、1.2%和2.4%)石膏及灌排水对土壤絮凝作用、上清液pH、上清液离子含量、土壤交换性离子含量、土壤碱化度、石膏利用率的影响。结果表明,施用石膏显著降低苏打盐碱土上清液pH及土壤碱化度,增加土壤水溶性中盐分离子含量;灌排水显著降低土壤盐分离子含量和土壤碱化度。各处理加入石膏后,上清液pH由10.31先降至8.19~8.55后又缓慢增加;第5天时,0.6%、1.2%和2.4%石膏用量处理上清液pH分别为9.53、8.52和8.34,土壤碱化度分别下降至50.40%、33.00%和25.23%,石膏利用率分别为52.59%、58.1%和40.99%。由此可见,在试验范围内,综合土壤改良效果及石膏利用率,1.2%石膏用量为试验最优用量。
In order to explore the effects of gypsum dosage on physical and chemical properties of soda alkali-saline soil under irrigation and drainage conditions,a laboratory simulation experiment was conducted to study the supernatant pH,supernatant ions,soil exchangeability ions,soil alkalinity,gypsum utilization rate under different dosage of gypsums(0,0.6%,1.2%and 2.4%).The results showed that the application of gypsum could significantly decrease pH and exchangeable sodium percentage(ESP)of soda alkali-saline soil,but increase the content of water-soluble salt ions in soil;irrigation and drainage could reduce the content of water-soluble salt ions and ESP of soil.After the application of gypsum,pH of upper liquid decreased firstly from 10.31 to 8.55~8.19,and then slowly increased over time.The soil pH values of 0.6%,1.2%and 2.4%gypsum treatments were 9.53,8.52 and 8.34,respectively,at the 5^(th) day.The ESP decreased along with the irrigation and drainage.After 5 days,the ESPs of 0.6%,1.2%and 2.4%gypsum treatments decreased to 50.40%,33.00%and 25.23%,respectively.The utilization rates of gypsum were 52.59%,58.1%and 40.99%under different dosage of gypsum treatments(0.6%,1.2%and 2.4%).In consideration of the integrated soil improvement and gypsum utilization,the best dosage of gypsum was 1.2%.
作者
黄艳飞
陈君梅
辛亚宁
吴庆丽
HUANG Yanfei;CHEN Junmei;XIN Yaning;WU Qingli(Chengdu Agricultural College,Chengdu 611130,China)
出处
《中国农业科技导报》
CAS
CSCD
北大核心
2021年第11期139-146,共8页
Journal of Agricultural Science and Technology
基金
四川省科技计划项目(2018JY0358)
成都农业科技职业学院院级科研基金项目(CNY19-17,CNY19-13)。
关键词
石膏
苏打盐碱地
土壤改良
土壤理化性质
gypsum
soda saline-alkaline land
soil improvement
physical and chemical properties of soil
