摘要
为揭示隆回植烟土壤全钾含量偏高以及速效钾与缓效钾含量偏低的现象,并探索其影响因子,笔者采用传统统计法以及地统计学方法对隆回植烟土壤2012年各乡镇488份土样进行深入分析。结果表明:(1)隆回植烟土壤全钾平均含量为27.0 g/kg,处于"高"水平,速效钾与缓效钾平均含量分别为91.8、254.8 mg/kg,均处于"低"水平;(2)除中部广泛分布着"适宜"含量的缓效钾,其余大部分植烟乡镇处于偏低水平;(3)速效钾与缓效钾在不同质地土壤与不同类型土壤间存在极显著差异(P<0.01),且速效钾与有机质和p H间的回归方程分别为:Y速效钾=0.788X有机质+65.51,R2=0.9918**,Y速效钾=6.04Xp H+55.40,R2=0.9798**;(4)中粘土、中壤土、石灰土、红壤与水稻土钾肥肥力效果较好,且在适宜范围应尽量提高土壤有机质含量及p H。
In order to reveal the higher content of total soil potassium and the lower content of available K andslow available K of soil in Longhui, and explore the influencing factors, traditional statistical method andgeostatistics were adopted to analyze 488 soil samples in 2012. Results showed that：（1） the average content oftotal potassium in Longhui was 27.0 g/kg, which belonged to high level; and the average content of available Kand slow available K was 91.8 mg/kg and 254.8 mg/kg, respectively, which belonged to low level;（2） despitethe large distribution of suitable content of slow available K in the middle part of Longhui, most of the resttobacco planting towns had low level of slow available K;（3） available K and slow available K had a highlysignificant difference among different soil textures and types, the regression equation between available K,organic substance and p H was： Yavailable K=0.788 Xorganic substance＋65.51, R^2=0.9918＊＊and Yavailable K=6.04 Xp H＋55.40, R^2=0.9798＊＊, respectively;（4） K fertilizer effect was better in middle clay, loam soil, lime soil, red soil and paddysoil, and the content of soil organic matter and p H should be improved as much as possible in a suitable range.
出处
《中国农学通报》
2016年第7期140-146,共7页
Chinese Agricultural Science Bulletin
基金
湖南省科技厅"提高烟叶可用性的综合技术研发与示范"(合同号:011312800999)
关键词
隆回
植烟土壤
钾素
土壤质地
土壤类型
P
H
Longhui
tobacco planting soil
potassium
soil texture
agrotype
pH
作者简介
熊文晴，女，1990年出生，在读硕士，主要从事烟草成熟度技术研究。通信地址：410128湖南省长沙市芙蓉区湖南农业大学芷兰宿舍，E—mail：873472120@qq．com。
通讯作者：齐绍武，男，1966年出生，教授，博士，主要从事烟草成熟度技术研究。通信地址：410128湖南省长沙市芙蓉区湖南农业大学行政楼，E—mail：cs4618160@163．com。
