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 result 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 x 106/ha and 3. 48 x 106/ha,158. 7 ,158. 6,27. 9 27.2 g,respectively, 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 Xindaol8 was 3:7, giving a theoretical yield of 9 584. 7 kg/ha and high comprehensive quality.%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3.45×106/hm2和3.48×106/hm2,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9 584.7 kg/hm2,综合品质最优,是较为合理的一种氮肥基追模式.
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