土壤调理剂施用对植烟酸化土壤pH值和烤烟根系特性的影响  

Effects of soil conditioner application on pH value of acidified soil and root characteristics of flue-cured tobacco

作　　者：陈闺 周杰文 李海平 张发明 李春顺[4] 柳立 张毅[2] CHEN Gui;ZHOU Jiewen;LI Haiping;ZHANG Faming;LI Chunshun;LIU Li;ZHANG Yi(College of Resources & Environment, Hunan Agricultural University,Changsha 410128, China;College of Bioscience and Technology, Hunan Agricultural University, Changsha 410128, China;Baoshan City Branch of Yunnan Tobacco Company, Baoshan 678000, China;Jiangsu China Tobacco Industry Co., Ltd., Nanjing 210011, China;College of Agronomy, Hunan Agricultural University,Changsha 410128, China)

机构地区：[1]湖南农业大学资源环境学院,湖南长沙410128 [2]湖南农业大学生物科学技术学院,湖南长沙410128 [3]云南省烟草公司保山市公司,云南保山678000 [4]江苏中烟工业有限责任公司,江苏南京210011 [5]湖南农业大学农学院,湖南长沙410128

出　　处：《浙江农业学报》2021年第7期1275-1282,共8页Acta Agriculturae Zhejiangensis

基　　金：中国烟草总公司云南省公司项目(2018530000242017);江苏中烟工业有限责任公司项目。

摘　　要：为明确植烟酸化土壤施用调理剂后土壤pH值的动态变化,及其对烤烟根系特性的影响,以云南省保山市昌宁县、腾冲市的植烟酸化土壤为研究对象,采用盆栽试验,研究了石灰、木本泥炭基腐殖酸钾(腐殖酸钾)+水热法矿物钾肥(矿物钾肥)、腐殖酸钾+钙镁磷肥3种土壤调理剂组合,及硫酸钾施用对土壤pH值和烤烟根系特性的影响。结果表明:添加腐殖酸钾+矿物钾肥、腐殖酸钾+钙镁磷肥后60 d内,土壤pH值表现为先下降后逐步回升的趋势;短期内施用石灰对提高土壤pH值的效果最好,但长期来看有复酸风险。施用腐殖酸钾+矿物钾肥、腐殖酸钾+钙镁磷肥可显著(P<0.05)提高根际土壤有机酸含量、烤烟根系活力、根系ATP酶活性与地上部干物质量。在腾冲市供试土壤上,施用腐殖酸钾+矿物钾肥、腐殖酸钾+钙镁磷肥处理的烟株根系生物量较空白对照分别显著(P<0.05)增加46.09%、83.70%。结果表明,腐殖酸钾+矿物钾肥或腐殖酸钾+钙镁磷肥的土壤调理剂组合,能够减缓植烟酸化土壤继续酸化,且有利于烟株的生长发育。To clarify the dynamic variations of soil pH value and the effect on the root characteristics of flue-cured tobacco of soil conditioner application in acidified tobacco-planting soil,a pot experiment was conducted with soils of Changning County and Tengchong City,Baoshan City,Yunnan Province.The used soil conditioners consisted of lime,woody peat-based potassium humate(potassium humate for short)+hydrothermal mineral potassium fertilizer(mineral potassium fertilizer for short),potassium humate+calcium magnesium phosphate fertilizer.Also,potassium sulfate was used as one treatment besides the blank control(CK).The results showed that the soil pH value presented a trend of decreasing first and then gradually increasing after the addition of potassium humate+mineral potassium fertilizer and potassium humate+calcium magnesium phosphate fertilizer within 60 d.Lime application increased soil pH in a short time,yet it tended to become more acid for the long run.The application of potassium humate+mineral potassium fertilizer and potassium humate+calcium magnesium phosphate fertilizer significantly(P<0.05)increased the rhizosphere organic acid content,root activity,root ATPase activity and above-ground biomass of tobacco.In the soil of Tengchong City,compared with CK,root biomass was significantly(P<0.05)increased by 46.09%and 83.70%,respectively,after applying potassium humate+mineral potassium fertilizer and potassium humate+calcium magnesium phosphate fertilizer.In general,the application of potassium humate+mineral potassium fertilizer and potassium humate+calcium magnesium phosphate fertilizer could slow down the acidification of the acidified tobacco-planting soil,which is also beneficial for the growth and development of tobacco plants.

关 键 词：酸化土壤 土壤调理剂 烤烟 根系 钾 

分 类 号：S156.6[农业科学—土壤学]