摘要
在25年长期定位试验研究基础上,分析了无肥、N、NP、NPK、N+有机肥和N+秸秆6个不同施肥处理的0～20cm土壤微量元素B、Fe、Mn、Cu和Zn的质量分数变化。结果表明:不同施肥处理的土壤有效B和有效Zn均为增加,分别是试验基础数值的2.9倍～4.7倍和1.0倍～4.7倍。N+有机肥处理质量分数最高,无肥处理最低。有效Fe、Mn、Cu的质量分数除N+有机肥处理的Fe和Cu增加了0.95mg·kg-1和0.43mg·kg-1以外,都呈现出下降的趋势。各处理的土壤全量Fe呈减少趋势,全量Mn、Cu和Zn除无肥处理和Cu除单施N肥处理稍有减少以外,都呈现增加的趋势。全量Cu和Zn以N+有机肥处理质量分数最高,N+秸秆和施用P肥处理次之。施用以垃圾、畜禽废弃物为原料的有机肥以及施用P肥等可以增加土壤微量元素,施肥是影响土壤微量元素质量分数变化的重要因素。
On the basis of 25-years study on long-term located experiments of fertilization, analysis is made on the change tendency of microelement B, Fe, Mn, Cu, and Zn content of 0 - 20 cm topsoil which are treated with six different fertilizer trails as the following： fertilizing with N, NP, NPK, N＋organic fertilizer, N＋ straw and no fertilizer. The results show that： Both available B and available Zn had increased in soil with different fertilization, with 2.9-4.7 times and 1.0-4.7 times of the background value, respectively. N＋ organic fertilizer treatment has the highest value, and the lowest value occurs in the treatment without fertilization. The contents of available Fe, Mn and Cu, except that 0.95 mg·kg^-1 and 0.43 mg·kg^-1 increased in Fe and Cu with N＋ organic fertilizer treatment, all show a tendency to decrease. Soil total Fe shows a reductive tendency. Except for a little decrease in Cu for no fertilization and N fertilization, total Mn, Cu and Zn show a tendency to increase. Total Cu and Zn have the highest value with N^＋ organic fertilizer treatment, N＋ straw＇stalk and P fertilizer treatment in the next place. Using organic fertilizer which are rubbish and rejected materials of livestock and poultry, as well as P fertilizer etc., shall increase the microelement contents of soil, and fertilization is important for influencing the change in microelement contents of soil.
出处
《生态环境》
CSCD
北大核心
2005年第6期921-924,共4页
Ecology and Environmnet
基金
天津市科技攻关项目(91120803010)
天津市财政局资助项目
关键词
长期定位施肥
潮土
微量元素
long-term located fertilization
fluvo-aquic soil
microelement
