Li Wen-jun, Xia Yong-qiu, Yang Xiao-yun, Guo Miao, Yan Xiao-yuan
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
Ying Yong Sheng Tai Xue Bao. 2011 Sep;22(9):2331-6.
A field experiment was conducted in the Taihu Lake region of southern Jiangsu to study the effects of applying nitrogen (N) fertilizer and fertilizer additive on the rice yield and the rice plant N uptake, translocation, and utilization. Applying N fertilizer had significant positive effects on the rice yield, accumulative absorbed N at all growth stages and at each growth stage, and N translocation rate after anthesis (P < 0.01). However, when the N application rate exceeded 200 kg x hm(-2), its yield-increasing effect was not significant (P > 0.05). The N translocation rate after anthesis and the N fertilizer use efficiency decreased with increasing N application rate. Applying fertilizer additive further improved the rice yield, accumulative absorbed N, N translocation rate after anthesis, and N fertilizer use efficiency, and this effect was more evident when the N application rate was equal to or greater than 200 kg x hm(-2). Relatively high rice yield and N use efficiency were achieved when applying 150 kg x hm(-2) of N fertilizer without the application of fertilizer additive.
在苏南太湖地区进行了一项田间试验，以研究施用氮肥和肥料添加剂对水稻产量以及水稻植株氮素吸收、转运和利用的影响。施用氮肥对水稻产量、各生育阶段累积吸氮量和各生育期吸氮量以及花后氮素转运率均有显著的正向影响（P < 0.01）。然而，当施氮量超过200 kg·hm⁻²时，其增产效果不显著（P > 0.05）。花后氮素转运率和氮肥利用效率随施氮量增加而降低。施用肥料添加剂进一步提高了水稻产量、累积吸氮量、花后氮素转运率和氮肥利用效率，当施氮量等于或大于200 kg·hm⁻²时，这种效果更为明显。在不施用肥料添加剂的情况下，施用150 kg·hm⁻²氮肥时可获得相对较高的水稻产量和氮素利用效率。
