摘要
【目的】本文探索了成都平原-山地过渡带不同高程影响下耕地土壤养分变异特征。【方法】选择彭州市为研究区,在不同高程下采集1142个耕层土样,运用传统统计、相关性分析、方差分析、半变异函数模型优化以及协同克里格插值等方法对其养分数据进行分析。【结果】高程与速效钾、有机质呈极显著正相关关系,并与碱解氮、有效磷呈极显著负相关关系。碱解氮、有效磷含量随高程的升高而降低,再在>913 m的区域明显回升;速效钾、有机质含量随高程升高而增加。碱解氮、有效磷、有机质含量相对较低的区域主要集中分布在地带过渡性最大的高程范围内。【结论】研究结果有助于为成都平原-山地过渡带的耕地地力提升、土壤利用与保护提供一定参考,对促进耕地资源可持续利用和保障我国西南地区粮食安全具有重要意义。
【Objective】This paper aimed to investigate the variation characteristics of soil nutrients of cultivated land at different elevation in the transition zone between plain and mountain of Chengdu.【Method】Pengzhou city as the study area was chosen,1142 topsoil samples at different elevation were collected,and the nutrient data were analyzed with traditional statistics,correlation analysis,variance analysis,semi-variogram model optimization and Co-kriging interpolation.【Result】The correlation relationship between available potassium(AK),soil organic matter(SOM)and elevation were overwhelmingly positive,and the correlation relationship between alkali-hydrolyzable nitrogen(AN),available phosphorus(AP)and elevation were overwhelmingly negative.The content of AN and AP decreased with elevation in-creasing and then obviously rebounded at the area above 913 m,the content of AK and SOM increased with elevation.The area with relative-ly low content of AN,AP and SOM was mainly concentrated in the zone of the most transitional elevation.【Conclusion】The result of this study could be helpful for the improvement of the productivity of cultivated land,soil utilization and protection in the transition zone between plain and mountain of Chengdu,which was of great significance for promoting the sustainable utilization of the resource of cultivated land and ensuring southwest China's grain security.
作者
钟文挺
李浩
谢丽红
孙娟
何玉亭
王科
ZHONG Wen-ting;LI Hao;XIE Li-hong;SUN Juan;HE Yu-ting;WANG Ke(Agricultural Technology Popularization Station of Chengdu,Sichuan Chengdu 610041,China)
出处
《西南农业学报》
CSCD
北大核心
2020年第3期575-583,共9页
Southwest China Journal of Agricultural Sciences
基金
成都市科技转化与推广服务基金项目(2130106)。
关键词
高程
耕地土壤养分
变异
成都平原-山地过渡带
Elevation
Soil nutrients of cultivated land
Variation
Transition zone between plain and mountain of Chengdu
作者简介
钟文挺(1984-),男,四川成都人,硕士,主要从事土壤肥力与环境、地理信息系统研究,E-mail:158921696@qq.com。
