摘要
【目的】探明贵州植烟土壤pH值和速效钾含量剖面分布规律,为优质烟叶生产提供科学指导。【方法】选取贵州省36个典型烟田,挖掘宽1.0 m×深1.2 m的标准剖面,依据形态特征分层并采集各层土样,测定土壤pH值和速效钾含量,分析剖面变化模式及其影响因素。【结果】贵州植烟土壤pH值介于6.29~6.60,变异系数介于14.30%~15.33%(中度变异)。剖面分布模式分为递增型、递减型、先增后减型、先减后增型和均一型5种,以递增型为主,占比53.13%。速效钾含量介于133.02~314.03 mg/kg,变异系数介于29.74%~68.18%(中度变异)。剖面分布模式分为递减型、先增后减型、先减后增型和不规则型4种,以递减型为主,占比59.38%。pH值和速效钾剖面分布模式均受复合环境要素的影响。【结论】根据植烟土壤pH值和速效钾主要剖面分布模式及可能形成原因,在施肥和土壤保育上需结合植烟土壤实际情况有针对性的采取措施。
【Objective】The profile distribution of soil pH and available potassium content in the Guizhou tobacco growing area was studied,providing scientific guidance for the production of high quality tobacco.【Method】Standard soil pits(width:1.0 m×deepth:1.2 m)in 36 typical tobacco fields in Guizhou Province were selected,soil samples of each layer were collected according to the morphological characteristics,soil pH value and available potassium content were measured,and the pattern of profile change and its influencing factors were analyzed.【Result】The pH value of typical soils in different depths ranged from 6.29 to 6.60,and the coefficient of variation ranged from 14.30%to 15.33%(moderate variation).There are five types of profile models:increasing type,decreasing type,increasing and then decreasing type,decreasing and then increasing type and uniform type.The increasing type is the main type,accounting for 53.13%.The soil available potassium content ranged from 133.02 mg/kg to 314.03 mg/kg,and the coefficient of variation ranged from 29.74%to 68.18%(moderate variation).Its profile distribution pattern can be divided into four types:decreasing type,increasing first and then decreasing type,decreasing first and then increasing type and irregular type.Most of them were decreasing type,accounting for 59.38%.Both the pH value and the profile distribution pattern of available potassium were affected by combined environmental factors.【Conclusion】According to the distribution patterns and possible causes of soil pH value and available potassium,targeted fertilization and soil conservation measures need to be taken in combination with the actual situation of tobacco growing soils.
作者
高维常
蔡凯
李寒
朱经伟
刘艳霞
姜超英
GAO Weichang;CAI Kai;LI Han;ZHU Jingwei;LIU Yanxia;JIANG Chaoying(Guizhou Academy of Tobacco Science,Upland Flue‐cured Tobacco Quality&Ecology Key Laboratory of China Tobacco,Guiyang 550081,China;Guizhou Tobacco Corporation,Guiyang 550004,China)
出处
《甘肃农业大学学报》
CAS
CSCD
2023年第2期101-108,共8页
Journal of Gansu Agricultural University
基金
中国烟草总公司项目(110202102038)
贵州省科技计划项目(黔科合平台人才[2020]6020、黔科合基础[2019]1212)
中国烟草总司贵州省公司科技项目(2020XM08,201910,201933,201722)。
关键词
烟田
PH
速效钾
剖面分布模式
环境因素
贵州
tobacco field
pH
available K
profile distribution pattern
environmental factor
Guizhou Province
