摘要
在设施菜地条件下,研究不同有机肥施用水平(0～60thm-2)对不同肥力土壤的硝态氮垂直运移的影响。结果表明,土壤硝态氮的垂直运移过程受有机肥施用水平和土壤肥力的影响,施肥量低于20thm-2时不同肥力土壤未出现硝态氮显著累积现象,当施肥量为60thm-2时土壤硝态氮累积峰值随土壤肥力水平的提高而增加;40～150cm土壤剖面中硝态氮累积总量随有机肥施用量的增加而增加;不同肥力土壤在相同有机肥施用水平下40～150cm土壤硝态氮累积总量的变化量不同,土壤肥力越高土壤硝态氮累积总量的绝对增加量越大,说明相同的有机肥处理对高肥力土壤硝态氮累积和淋洗的影响更大;不同肥力的土壤具有不同的有机肥适宜施用量。
A field experiment was conducted in protected cultivation to study the effect of organic manure （0-60 t hm-2） on vertical distribution of NO3--N in different fertility soil depth profile. The result shows that, the organic manure and soil fertility had an effect on the vertical distribution of NO3--N in protected cultivation soil depth profile. When less than 20 t hm-2 organic fertilizer there was no NO3--N accumulation in different layers at different fertility soil, but when applied 60 t hm4 organic fertilizers the accumulation depth profile of NO3--N increased with the increase of the soil fertility. The soil NO3--N accumulation of 40-150 cm soil profile increased with the increase of the amount of organic manure applied. And there were different effects of different fertility soil on the soil NO3--N accumulation of 40-150 cm soil profile by the same amount of organic manure applied, the soil NO3--N accumulation in higher fertility soil was much more. So, it was more riskily to high fertility field to apply the same amount of organic manure than middle fertility field and low fertility field as there was more accumulation and distribution in depth profile of NO3--N; there were different amount of organic manure applied to different fertility soil.
出处
《土壤通报》
CAS
CSCD
北大核心
2009年第4期815-819,共5页
Chinese Journal of Soil Science
基金
国家科技支撑计划项目(2006BAD17B07)
中国科学院知识创新工程重要方向项目(KSCXZ-YW-N-037)资助
关键词
设施菜地
土壤肥力
有机肥
硝态氮
Protected cultivation
Soil fertility
Organic manure
NO3--N
