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黄土高原旱地肥料长期定位试验研究——氮磷化肥利用率与硝态氮累积
STUDY OF LONG-TERM FERTILIZER LOCATED TEST IN DRY LAND OF LOESS PLATEAU-USING RATE OF N P AND NO3-N ACCUMULATION
【Author】 Hao Mingde Fan Jun Dang yanhui Guo shengli (Institute of Soil and Water conservation, CAS, Yangling , Shared 712100)
【机构】 中国科学院水利部水土保持研究所；
【摘要】 本文研究了我国黄土高原早地长期定位施肥对小麦产量及氮、磷养分利用率的影响。结果表明,长期施用化肥能大幅度提高小麦产量,其幅度与降水有密切关系;氮磷配合能提高氮磷化肥利用效率,并能显著降低土壤剖面的硝态氮含量。大量施用氮肥在土壤剖面140cm处形成明显的硝态氮累积峰。控制硝态氮累积将是施用氮磷化肥时应密切关注的问题。
【Abstract】 Effects of long-term located fertilization on wheat yield and using rate of N, P nutrient were studied in dry land of loess plateau in the paper . The results show fertilizer increased that wheat yield greatly. The range connected with precipitation . Using rate of fertilizer was impressed because of N. P coordination and NO3-N contents of soil profile were reduced. NO3-N would be accumulated in 100 - 180cm of soil profile under condition that lots of N was used.The question of NO3-N accumulation should be paid attention.
【Key words】 Long-term located fertilization； NO3-N accumulation； using rate of fertilizer；
- 【会议录名称】 青年学者论土壤与植物营养科学——第七届全国青年土壤暨第二届全国青年植物营养科学工作者学术讨论会论文集
- 【会议名称】第七届全国青年土壤暨第二届全国青年植物营养科学工作者学术讨论会
- 【会议时间】2000-09
- 【会议地点】中国北京
- 【分类号】S143
- 【主办单位】中国土壤学会青年工作委员会、中国植物营养与肥料学会青年工作委员会