WANG Shining,XIE Xueguo,YUAN Lei,et al.Application of a Dilution Model for Critical Nitrogen Concentration in Pigmented Peppers Under Staged Nitrogen Reduction[J].Northern Horticulture,2023,(05):1-9.[doi:10.11937/bfyy.20222976]
阶段性减氮色素辣椒临界氮浓度稀释模型应用
- Title:
- Application of a Dilution Model for Critical Nitrogen Concentration in Pigmented Peppers Under Staged Nitrogen Reduction
- Keywords:
- pigment pepper; biomass; nitrogen content; nitrogen nutrition index; critical nitrogen dilution curve
- 文献标志码:
- A
- 摘要:
- 以新疆主栽色素辣椒“红龙23号”为试材，在苗期、坐果期、果实膨大期、果实成熟期分别进行N0（不施氮）、N100（足量氮）、N60（减氮40%）、N20（减氮80%）减氮处理，研究减氮处理对4个时期地上部和叶片的生物量和全氮含量的影响，构建模型，并以N80（减氮20%）、N40（减氮60%）2个处理进行验证应用，确定色素辣椒的氮素临界浓度，以期为新疆地区色素辣椒氮肥精确管理提供参考依据。结果表明：构建的色素辣椒临界氮浓度稀释曲线模型均符合负幂指关系。“红龙23号”辣椒的苗期、坐果期、果实膨大期在N80施肥条件下地上部氮含量位于稀释曲线的周围，NNI（氮素营养指数）接近于1，辣椒能保持较好的氮素供应水平，说明这3个时期在传统氮肥用量的基础上可减少20%氮肥；但果实成熟期由于氮素稀释过快，NNI多低于1，因此该时期不建议减少氮肥用量。
- Abstract:
- ‘Red Dragon 23’ of the main pigmented pepper in Xinjiang was used as the test material.N0 (no N application),N100 (full N),N60 (40% N reduction) and N20 (80% N reduction) were applied at seedling,fruit set,fruit expansion and fruit ripening stages.The effects of N reduction on aboveground and leaf biomass and total N content in the latter four periods were studied,and a model was constructed to model the critical N concentration dilution curve of pigmented peppers,in order to provide reference for the precise management of nitrogen fertilizer for pigment pepper in Xinjiang.The results showed that the dilution curves of the critical nitrogen concentration of pigmented peppers were all in accordance with the negative power index relationship.The aboveground N content of ‘Red Dragon 23’ pepper at the seedling,fruit set and fruit set stages was around the dilution curve under N80 fertilization.This means that these three periods could be reduced by 20% on the basis of the traditional N fertiliser dosage;however,the NNI was mostly below 1 during the fruit ripening period due to the rapid dilution of N,so a reduction in N fertiliser dosage was not recommended for this period.
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备注/Memo
第一作者简介：王世宁（1997-），男，硕士研究生，研究方向为园艺抗逆。E-mail:1466567607@qq.com.责任作者：吉雪花（1978-），女，博士，副教授，现主要从事蔬菜抗逆及种质创新等研究工作。E-mail:lilysnowjxh@163.com.基金项目：国家自然科学基金资助项目（31860548，32060676）。收稿日期：2020-07-20