• ISSN 1008-505X
  • CN 11-3996/S
曹兵, 徐秋明, 任军, 边秀芝. 延迟释放型包衣尿素对水稻生长和氮素吸收的影响[J]. 植物营养与肥料学报, 2005, 11(3): 352-356. DOI: 10.11674/zwyf.2005.0311
引用本文: 曹兵, 徐秋明, 任军, 边秀芝. 延迟释放型包衣尿素对水稻生长和氮素吸收的影响[J]. 植物营养与肥料学报, 2005, 11(3): 352-356. DOI: 10.11674/zwyf.2005.0311
CAO Bing, XU Qiu-ming, REN Jun, BIAN Xiu-zhi. Effects of delayed release coated urea on rice growth and nitrogen absorption[J]. Journal of Plant Nutrition and Fertilizers, 2005, 11(3): 352-356. DOI: 10.11674/zwyf.2005.0311
Citation: CAO Bing, XU Qiu-ming, REN Jun, BIAN Xiu-zhi. Effects of delayed release coated urea on rice growth and nitrogen absorption[J]. Journal of Plant Nutrition and Fertilizers, 2005, 11(3): 352-356. DOI: 10.11674/zwyf.2005.0311

延迟释放型包衣尿素对水稻生长和氮素吸收的影响

Effects of delayed release coated urea on rice growth and nitrogen absorption

  • 摘要: 通过田间试验比较研究了普通尿素和延迟释放型包衣尿素在不同施用量、不同施肥方式(普通尿素为基肥+两次追肥;延迟释放型包衣尿素为接触施肥方式)条件下对移栽稻生长过程和氮素吸收的影响。结果表明,延迟释放型包衣尿素在比普通尿素施氮量(N150kg/hm2)减少30%(N105kg/hm2)和50%(N75kg/hm2)时,对水稻生长不会产生任何不良影响;由于包衣尿素在田间的养分释放动态与水稻对氮素的吸收规律吻合,施用包衣尿素的水稻产量、吸氮量和氮肥利用率均显著高于普通尿素处理,其中水稻产量增加12.7%~14.4%,吸氮量增加27.5%~32.7%;普通尿素和氮肥用量减少30%和50%的包衣尿素3个处理的氮肥利用率分别为19.9%、58.8%和89.9%。此外,施用包衣尿素比普通尿素水稻的子粒粗蛋白质含量提高9.2%~12.2%。

     

    Abstract: In order to increase crop production and maximize nitrogen utilization efficiency, field experiments were conducted to investigate the effect of urea and delayed release coated urea under different conditions (with different dose and applied methods) on the growth and nitrogen uptake of transplanted rice. Urea(U) was applied in conventional way (basal dressing plus twice topdressing) with the nitrogen application rate being 150 kg per hectare, while delayed release coated urea was applied with single basal in nursery bed using contact placement method with by single basal application and nitrogen application rate of two coated urea treatments(N0.5,N0.7) was 75 and 105 kg per hectare respectively. The results showed that there was no negative impact on rice growth using delayed release coated urea with contact placement. Coated urea increased rice yield, nitrogen absorption and nitrogen utilization efficiency significantly. Comparing the (effects) of coated urea with urea, rice yield increased by 12.7%14.4%, nitrogen absorption increased by 27.5%32.7%. The nitrogen utilization efficiency was 19.9%, 89.9%, 58.8% for urea, coated urea with 50% application reduction and 70% application reduction respectively. Meanwhile, grain protein content with coated urea promoted by 9.2%12.2%.

     

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