A Preliminary Study on Nitrogen Use Efficiency of Hybrid Rice Combinations Derived from CMS Line Rong 18A  

蓉18A系列杂交水稻品种氮肥利用特性的初步研究（英文）

作　　者：徐敬洪[1] 蔡良俊[1] 沈超[1] 张帆[1] 王富全[1] 文勇[1] 袁亚章[1] 李志义[1] 杨震[1] 

机构地区：[1]成都市农林科学院作物研究所,四川温江611130

出　　处：《Agricultural Science & Technology》2016年第9期2070-2073,2089,共5页农业科学与技术（英文版）

基　　金：Supported by Key Project for Rice Breeding of Sichuan Province(YZGG2014-1)~~

摘　　要：In order to investigate characteristics of nitrogen use efficiency of CMS line Rong 18A, four hybrid rice combinations （Rong18 You188, Rong18 You198, Rong18 You662, Rong18 You908） derived from CMS line Rong 18A were used as experimental materials with Ⅱ You838 and Gangyou725 as controls. A split-plot experimental design was performed with four nitrogen fertilizer application rates to analyze the effects of different nitrogen fertilizer application rates on the yield and yield component factors of rice. The results showed that nitrogen fertilizer could significantly increase effective panicle number to improve rice yield. The increment in rice yield per unit nitrogen fertilizer application rate demonstrated a descending trend with the increase of nitrogen fertilizer application rate. Under low nitrogen levels, hybrid rice combinations derived from Rong 18A exhibited relatively high nitrogen use efficiency and showed remarkably high nitrogen use efficiency under low nitrogen levels.为探究蓉18A系列杂交水稻品种的氮肥利用特性,选用4个蓉18A代表性品种蓉18优188、蓉18优198、蓉18优662、蓉优908,以Ⅱ优838、冈优725为对照,采用裂区设计,设置4个氮肥梯度,研究不同氮肥用量对产量及产量因素的影响。结果表明,氮肥增产的主要原因是促进有效穗的显著增加,单位施氮量的增产幅度均随施氮水平的增加而递减,在低氮水平下,蓉18A系列品种的氮肥利用率较高,具有明显的低氮高效特性。

关 键 词：Rong 18A Hybrid rice Nitrogen fertilizer Use efficiency 

分 类 号：S511[农业科学—作物学]