摘要
通过9个大田试验研究了氮肥用量对甜荞麦产量、养分含量、养分累积量及氮肥利用率的影响。结果表明,施氮(N)30、60和90kg/hm2与不施氮相比平均子粒产量分别增加52.6%、83.0%和63.7%,子粒含氮量增加7.0%、10.8%和6.9%,植株地上部氮素总累积量提高66.9%、119.3%和109.5%。说明施氮能提高甜荞麦子粒产量,提高甜荞麦对氮素吸收和累积,甜荞麦氮素生理效率、氮素收获指数、氮素利用率、氮肥农学利用率、氮肥效率和氮肥生理利用率均随氮肥用量的增加而下降。综合结果表明,内蒙古通辽市库伦旗甜荞麦高产高效生产的氮肥推荐使用量为N 30～60kg/hm2。
Nine field experiments were carried out to study the effects of nitrogen （N） application rate on F. esculentum Moench yield and N fertilizer utilization efficiency in Kulun of Longliao in 2010. Compared to no N application ,the yield of N treatments （ as 30,60 and 90kg/hmz ） increased by 52.6% ,83.0% and 63.7% respectively. N content increased by 7.0% ,10.8% and 6.9%, and total N absorbed by above ground parts increased by 66.9%, 119.3 % and 109.5% respectively. The results demonstrated that N application significantly promoted growth, yield and N accumulation. With increased N application rate, N physiological efficiency, N harvest index, N utilization efficiency, N fertilizer agronomic utilization efficiency, N fertilizer efficiency, and physiological utilization efficiency of F. esculentum Moench were decreased significantly. Based on F. esculentum Moeneh yield and N utilization efficiency, the optimum N fertilizer application rate recommended was 30 - 60kg/hm^2 at Kulun of Tongliao.
出处
《作物杂志》
CAS
CSCD
北大核心
2013年第1期102-105,共4页
Crops
基金
内蒙古自然科学基金资助项目(20080404MS0607)
内蒙古民族大学科学研究项目(NMD1112)
关键词
氮肥用量
甜荞麦
产量
氮素利用率
F. esculentum Moench
Nitrogen application rate
Yield
Nitrogen utilization efficiency
