施氮水平对燕麦产量与养分吸收的影响

Effects of Fertilizer N on Yield and Nutrients Uptake of Oat

以青引1号燕麦为材料,研究了不同施氮水平对燕麦产量与养分吸收的影响。结果表明:施氮对燕麦的穗数、穗长、穗重、穗粒数、草产量和种子产量均有显著影响(P<0.05);氮肥用量为75kg/hm2时,穗数、穗长、穗重、穗粒数、草产量和种子产量达最大值,分别为626.84个/m2、17.54cm、2.95g/穗、31.31粒/穗、20.71×103kg/hm2、6.49×103kg/hm2;燕麦植株氮、磷、钾含量随生育进程呈下降趋势,同一生育期氮、磷、钾含量随施氮量的增加而增加;氮肥的农学效率、生理效率和当季回收率均随氮肥施用量的增加而下降。

The effect of nitrogen application on the yield and nutrients uptake of Avena sativa cv. Qingyin No. 1 was studied. The results showed that fertilizer N significantly increased ear number, ear length, ear weight, seed number/ear, hey yield and seed yield（P〈0.05）. The ear number, ear length, seed weight/ear, seed number/ear, hey yield and seed yield of Qingyin No. 1 oats at 75kg N/hm2 reached the maimum, 626.84 ears/m2, 17.54cm, 2.95g/ear, 31.31grains/ear, 20.71×103kg/hm2, 6.49×103kg/hm2 respectively. The content of N, P, K in Qingyin No. 1 oat increased with the rate of N applied. Agronomic efficiency, physiological efficiency and recovery efficiency decreased with the increase amount of N applied.