Dry Matter Production Characteristics of Rice Cultivars with High Yield and High N Use Efficiency

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Online published: 2015-07-20

Abstract

Field experiments were conducted to study the combined increase of high yield and high N use efficiency of rice cultivar in 2013 and 2014 at Guiyang city, using two high yield and high N use efficiency cultivars Jiangyou 9527, Qyou 6 and two high yield and low N use efficiency cultivars Fengyan425 and Gangyou527 as materials. The results showed that, compared with the low N use efficiency cultivars, high N use efficiency cultivars have lower effective panicles, lower total dry matter accumulation, but higher grains per panicle, seed setting rate, 1000-grain weight and harvest index. The leaves area index of high N use efficiency cultivars at middle stage were lower than that of low N use efficiency cultivars, but were higher at mature stage, and the SPAD of flag leaf was higher in middle and late filling stage.

Cite this article

LI Min, LUO De-Qiang, JIANG Xue-Hai, ZHOU Wei-Jia-*, JI Guang-Mei, WANG Xue-Hong, LI Shu-Xing . Dry Matter Production Characteristics of Rice Cultivars with High Yield and High N Use Efficiency[J]. China Rice, 2015 , 21(4) : 65 -67 . DOI: 10.3969/j.issn.1006-8082.2015.04.013

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