Chinese Journal OF Rice Science

Chinese Journal OF Rice Science >

2011 , Vol. 25 >Issue 1: 79 - 85

DOI: https://doi.org/10.3969/j.issn.1001-7216.2011.01.012

研究报告

Effects of RowSpacing on Yield of SuperHighYielding Early and Late Rice

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  • 1Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education/Key Laboratory of Physiology, Ecology and Cultivation of Double Cropping Rice, Ministry of Agriculture, Jiangxi Agricultural University, Nanchang 330045， China; 2Jiangxi Academy of Agricultural Sciences, Nanchang 330200, China; *Corresponding author， E-mail: xhuapan@163.com

Received date: 1900-01-01

  Revised date: 1900-01-01

  Online published: 2011-01-10

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Abstract

With the same planting density（3×105hills/hm2 for early rice and 2.5×105 hills/hm2 for late rice）, the effect of rowspacing on the yield of superhighyielding rice was studied at three nitrogen application levels with early rice Ganxin 203 and Luliangyou 996 and late rice Tianyouhuazhan and Ganxin 688 as materials. Narrow rowspacing was favorable for higher yield of the four tested materials with no nitrogen application. With the same nitrogen application levels, medium rowspacing produced higher yield for Ganxin 203, wide or narrow rowspacing for Luliangyou 996 and Tianyouhuazhan, and narrow rowspacing for Ganxin 688. Number of effective panicles was the main factor responsible for the effect of rowspacing on yield for both Luliangyou 996 and Tianyouhuazhan, but number of grains per panicle for Ganxin 203, and seedsetting rate for Ganxin 688. Different responses to rowspacing among different materials could be attributed to the number of grains per panicle and panicle forming rate, which were lower for Ganxin 203 and higher for Luliangyou 996 and Tianyouhuazhan, and to higher leaf area index for Ganxin 688. The appropriate rowspacing was 33.0 cm×10.0 cm or 20.6 cm×16.0 cm for early rice Luliangyou 996, 25.4 cm×13.0 cm for early rice Ganxin 203, 40.0 cm×10.0 cm or 20.0 cm×20.0 cm for late rice Tianyouhuazhan, and 20.0 cm×20.0 cm for late rice Ganxin 688.

Key words： superhigh-yielding rice; early rice; late rice; rowspacing; plant density; yield; nitrogen use efficiency

Cite this article

LIN Hong-xin,PAN Xiao-hua,SHI Qing-hua,PENG Chun-rui,WU Jian-fu,LEI Xiang-liang . Effects of RowSpacing on Yield of SuperHighYielding Early and Late Rice[J]. Chinese Journal OF Rice Science, 2011 , 25(1) : 79 -85 . DOI: 10.3969/j.issn.1001-7216.2011.01.012

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