摘要
以费乌瑞它为试验材料,通过田间试验研究不同施氮量(N0、86、124、161、248kg/hm^2)对马铃薯干物质累积规律、氮素累积规律、产量和氮肥利用率的影响。结果表明,在块茎膨大期和成熟期,随着施氮量的增加,马铃薯块茎的干物质、氮素累积均呈先增加后降低的趋势。马铃薯最高产量在施氮量为124kg/hm^2(N2处理),与N0处理相比,N2处理块茎产量显著增加了19.8%。通过曲线回归分析得出,马铃薯的最佳施氮量为137.6kg/hm^2。马铃薯氮素吸收利用率以施氮量124kg/hm^2处理最高,为37.1%,其氮肥偏生产力、氮肥农学利用效率和氮肥生理利用效率均以施氮量86kg/hm^2处理最高,分别为293.1、35.7、97.4kg/kg。在安徽稻茬田马铃薯生长中适宜施氮量应控制在130~150kg/hm^2。
Using “Favorite” varieties as material,a field experiment was carried out to investigate the effects of different nitrogen level (N 0,86,124,161,248 kg/hm 2 ) on dry matter accumulation,nitrogen accumulation,yield and nitrogen utilization efficiency of potato.The results showed that the dry matter and nitrogen accumulation of potato increased at first and then decreased with the increasing nitrogen fertilizer in the tuber bulking and maturity stage.The highest yield of potato was observed in nitrogen 124 kg/hm 2 level (N 2).Compared with N 0 treatment,the yield of N 2 treatment significantly increased 19.8%.Regression analysis showed that the best nitrogen application rate was 137.6 kg/hm 2.The highest N recover efficiency of potato was observed in nitrogen 124 kg/hm 2 level,about 37.1%.The highest partial factor productivity of applied N,N agronomic efficiency and N physiological efficiency of potato were observed in nitrogen 86 kg/hm 2 level,about 293.1,35.7,97.4 kg/kg,respectively.The nitrogen application rates should be controlled by 130-150 kg/hm 2 in potato production areas of Anhui rice stubble field.
作者
邬刚
廖华俊
袁嫚嫚
王家嘉
耿维
王家宝
张祥明
闫冲冲
孙义祥
WU Gang;LIAO Hua-jun;YUAN Man-man(Soil and Fertilizer Institute,Anhaui Academy of Agricultural Sciences,Hefei,Anhui 230031;Horticultural Research Institute,Anhui Academy of Agricultural Sciences,Hefei,Anhui 230031)
出处
《安徽农业科学》
CAS
2019年第16期184-186,195,共4页
Journal of Anhui Agricultural Sciences
基金
安徽省农业科学院科技创新团队项目(18C1021)
国家重点研发计划项目(2018YFD0200810)
关键词
马铃薯
稻茬田
氮肥
氮素累积
产量
Potato
Rice stubble fields
Nitrogen fertilizer
Nitrogen accumulation
Production
