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Journal of Integrative Agriculture  2020, Vol. 19 Issue (6): 1577-1585    DOI: 10.1016/S2095-3119(19)62724-3
Special Issue: 麦类耕作栽培合辑Triticeae Crops Physiology · Biochemistry · Cultivation · Tillage
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The effects of intraspecific competition and light transmission within the canopy on wheat yield in a wide-precision planting pattern
LIU Xin*, WANG Wen-xin*, LIN Xiang, GU Shu-bo, WANG Dong
College of Agronomy, Shandong Agricultural University/State Key Laboratory of Crop Biology, Ministry of Science and Technology/Key Laboratory of Crop Ecophysiology and Farming System, Ministry of Agriculture, Tai’an 271018, P.R.China
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The wide-precision planting pattern has become widely used in the North China Plain as a practice for increasing wheat yield.  However, the effects of tillering development and light transmission within canopy on wheat yield under different sowing widths have not been clearly described.  Therefore, a two-year experiment was conducted, including four different seeding widths (6 cm, W6; 8 cm, W8; 10 cm, W10; 12 cm, W12) and the traditional planting pattern with seeding width of 4 cm (W4).  The results indicated mainly positive effects by the reduced intraspecific competition, specifically all three yield components of W6 and W8 were higher than those for W4.  The configurations with more than 10-cm seeding width were mainly affected by the negative effect of a relative homogeneous canopy, leading to the weakened light transmission, leaf senescence, and reduced grain number per spike.  Finally, the yields of W6 and W8 were significantly higher than that of W4, whereas the yield in W12 was lower (though not significantly) than W4.  In wheat production, therefore, the appropriate seeding width of 6–8 cm is recommended for farmers, whereas the too wide seeding width, with more than 10 cm, should be avoided.
Keywords:  light transmission        seeding width        tillers number        winter wheat        yield components  
Received: 21 January 2019   Accepted:
Fund: This work was supported by the Special Fund for Agro-scientific Research in the Public Interest, China (201503130).
Corresponding Authors:  Correspondence WANG Dong, Tel: +86-538-8240096, Fax: +86-538-8242226, E-mail:    
About author:  * These authors contributed equally to this study.

Cite this article: 

LIU Xin, WANG Wen-xin, LIN Xiang, GU Shu-bo, WANG Dong. 2020. The effects of intraspecific competition and light transmission within the canopy on wheat yield in a wide-precision planting pattern. Journal of Integrative Agriculture, 19(6): 1577-1585.

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