摘要
为了解辽宁省不同土层速效养分的空间分布特征,辽宁省气象局在59个农业气象站对148个采样点进行0~20 cm和20~40 cm两层土壤取样,利用GPS对采样点进行定位,对各采样点土壤速效养分状况与分布进行了研究。结果表明,土壤剖面分布中,土壤表层（0~20 cm）速效养分含量均高于下层（20~40 cm）。普通克里格插值法分析表明,碱解氮从东至西呈明显的递减趋势,铵态氮和硝态氮无明显的空间趋势分布规律;速效磷为东部较高;速效钾在盘锦含量最高,在辽宁东部较低。农田土壤速效养分的空间分布特征为农田管理提供了理论依据。
The available nutrients content and distribution of soil samples collected from two soil layers with 0~20cm and 20~40cm depth of 148 sampling sites allocated by GPS to the spatial distribution characteristic of available nutrients in different soil layers in Liaoning province.The results showed that the content of available nutrients in the upper soil layer was higher than that in the soil layer with 20～40cm depth,the content of alkaline hydrolysis nitrogen presented a obvious gradual reduction trend from east to west,there was no obvious spatial distribution regulation in the content of ammonium nitrogen and nitrate nitrogen,the available phosphorus content in the east was higher and the available potassium content in Panjin was the highest.The spatial distribution characteristic of soil available nutrients provides a theoretical basis for farmland management in Liaoning province.
出处
《贵州农业科学》
CAS
北大核心
2010年第6期121-125,共5页
Guizhou Agricultural Sciences
基金
公益性行业(气象)科研专项经费项目"耦合生态系统动态的森林雷击火预报评估系统研制"(GYHY200706021)
科技部公益性项目"气候变化对东北森林生态系统及典型流域水资源影响评估预研究"(SYKYYW200903)
关键词
速效养分
空间分布
土壤剖面
辽宁
available nutrient
spatial distribution
soil profile
Liaoning
