摘要： 为了探讨水稻新品种新稻18适宜的基肥与追肥比例，通过对新稻18氮肥不同基追处理3年的试验研究，结果表明，该品种作为水稻中熟中粳高产水稻的代表，氮肥基肥与追肥在4：6和3：7时穗数分别达到3．45×10^6／hm^2和3．48×10^6／hm^2，穗粒数分别达到158．7，158．6粒，千粒质量达到27．9，27．2g，与其他4个处理相比差异显著，产量优势明显；同时氮肥基肥与追肥在3：7的比例下整精米率较高，垩白度和直链淀粉含量均较低，胶稠度较长，表现出较好的碾米品质和外观品质。因此，在氮肥基追比为3：7时，理论产量为9584．7kg／hm^2，综合品质最优，是较为合理的一种氮肥基追模式。

关键词: 新稻18, 无机氮, 基追比, 产量, 品质

Abstract: In order to confirm the proper ratio of base fertilizer to topdressing for new rice variety Xindao 18 cultivation, the inorganic fertilizer experiment was conducted for 3 years with 6 treatments of different ratios. The re- sult showed that,when the ratio of base fertilizer to topdressing was 4 ： 6 and 3 ： 7, the spike number, grain number per spike and 1000-grain weight reached to 3.45 × 10^6/ha and 3.48 × 10^6/ha, 158.7,158.6,27.9 27.2 g, respec- tively, the yield advantage being obvious compared to other four treatments. Besides, Xindao 18 had good milling and appearance quality when the N ratio of base fertilizer to topdressing was 3 ： 7,and also presented the high head rice rate,low chalkiness degree and amylose content, and thick gel consistency. It was concluded that the appropriate N ratio of base fertilizer to topdressing for Xindao18 was 3 ： 7, giving a theoretical yield of 9 584.7 kg/ha and high comprehensive quality.

Key words: Xindao 18 Inorganic, N Ratio of base fertilizer to topdressing, Yield Quality

中图分类号: 

• S143