CAI Wan-tao,HUAI He-ju.Effects of N Application Rate on Cabbage Nitrogen Utilization andContent of Nitrate-Nitrogen in Soil[J].Northern Horticulture,2012,36(23):181-184.
施氮水平对大白菜氮素利用及土壤硝态氮含量的影响
- Title:
- Effects of N Application Rate on Cabbage Nitrogen Utilization andContent of Nitrate-Nitrogen in Soil
- 文章编号:
- 1001-0009(2012)23-0181-04
- Keywords:
- cabbage; N application rate; N uptake and utilization; yield; NO3-N
- 分类号:
- S 634.1
- 文献标志码:
- A
- 摘要:
- 以“北京新三号”大白菜为试材，研究了不同施氮水平对大白菜氮素利用及土壤硝态氮残留的影响，以期为氮肥合理利用提供科学依据。结果表明：施氮量与产量之间符合二次曲线关系；施氮水平150 kg/hm2为秋季大白菜最佳施氮量，当施氮水平低于该值时，土壤硝态氮残留保持在较低水平，表观损失量也很低；当施氮水平超过该值时，土壤中硝态氮的残留量和损失量均会显著增加；种植区域平均施氮量为300 kg/hm2时，通过改善施肥方法与灌溉方式，大幅度减少氮肥用量，仍可获得较高产量。
- Abstract:
- Taking ‘Beijing New No.3’ Chinese cabbage as material，the effect of different nitrogen levels on cabbage nitrogen utilization and residual soil nitrate were studied in this paper.The results showed that there existed the quadratic relationship between nitrogen application rate and yield；the optimal nitrogen rate for the season cabbage was the nitrogen levels of 150 kg/hm2;when nitrogen levels below this value，the soil nitrate residued maintained at a low level，the apparent loss was low；when nitrogen levels exceed the value，the residual nitrate in the soil and the loss in volume would increase significantly；the average nitrogen application rate of growing region was 300 kg/hm2，by improving fertilization and irrigation methods，reducing the nitrogen application rate，it still could obtain a higher yield.
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备注/Memo
第一作者简介：蔡万涛(1980-)，男，辽宁大连人，博士，助理研究员，现主要从事科研管理等工作。E-mail：wtcai1980@126.com.