摘要
采用野外调查采样与室内分析相结合的方法,对沈阳市东陵区和苏家屯区典型耕地棕壤土壤养分现状及变化趋势进行了研究,并根据养分等级作空间分布图,从而更好反映该地区养分丰缺状况。试验结果表明:沈阳地区耕地棕壤氮素含量处于较丰富等级,速效磷含量为(23.57±14.94)mg·kg-1,与二次土壤普查数据相比呈大幅度上升趋势,而速效钾含量为(76.10±26.81)mg·kg-1,下降幅度达29.54%,缺乏较严重,有机质含量和CEC处于中等水平。土壤中各养分均处于中等变异强度,不同养分空间分布状况有较大差异。土壤pH值平均为5.61,有酸化趋势。
A survey was made with the methods of sampling and analysis on soil nutrients and evolutionary trends of the typical arable brown soil in Dongling and Sujiatun Districts of Shenyang. The spatial distribution was also made based on the nutrient classification. The contents of total and available nitrogen were quite high. The content of available phosphorus was 23.57±14.94mg·kg^-1, much higher than that of the second soil general survey. The content of available potassium was 76.10±26.81mg·kg^-1, 29.54% lower than that of the second soil general survey, showed absence. The content of organic matter and CEC were in medium level. The variation of soil nutrients was not high and the spatial distribution of different nutrient items was not consistent. Soil pH was 5.61, with a trend of acidification.
出处
《沈阳农业大学学报》
CAS
CSCD
北大核心
2009年第2期178-182,共5页
Journal of Shenyang Agricultural University
基金
辽宁省教育厅高校创新团队计划资助项目(2006T121)
关键词
棕壤
养分现状
养分分级
空间分布
变化趋势
arable brown soil
soil nutrients
nutrient classification
spatial distribution
evolutionary trends
