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[1]YAN Xiao-juan,ZHANG Sui-qi,WANG Zong-ren,et al.Responses of Root Growth and Water Use Efficiency to Planting Density for Winter Wheat Varieties from Different Eras in Semi-arid Region[J].Research of Soil and Water Conservation,2013,20(06):32-36.

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Responses of Root Growth and Water Use Efficiency to Planting Density for Winter Wheat Varieties from Different Eras in Semi-arid Region

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 20 Number of periods: 2013 06 Page number: 32-36 Column: Public date: 2013-12-28

Title:: Responses of Root Growth and Water Use Efficiency to Planting Density for Winter Wheat Varieties from Different Eras in Semi-arid Region

Author(s):: YAN Xiao-juan¹, ZHANG Sui-qi^1,2, WANG Zong-ren³, SUN Ying-ying¹; 1. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. Institute of Soil and Water Conservation, Chinese Academy of Sciences, Ministry of Water Resources, Yangling, Shaanxi 712100, China;
3. Zhujia Zhuang Agrotechnical Station of Qishan County, Shaanxi Province, Qishan, Shaanxi, 712000, China

Keywords:: winter wheat; root system; water use efficiency (WUE); planting density

CLC:: Q945.79

DOI:: -

Abstract:: Fine cultivar and suitable planting density are fundamentals for improving wheat yield. We tried to determine the influence of the planting density on the growth of root system, water use efficiency (WUE) and yields for winter wheat varieties from different eras in semi-arid region. Three cultivars introduced between 1960s and 2000s in the Loess Plateau were grown at three different planting density (100×10⁴ plants/hm², 250×10⁴ plants/hm² and 350×10⁴ plants/hm²) in the field. The results showed that the yields and WUE reduced along with the increase of planting density for the variety Fengchan3 in 1960s,; the yields and WUE were the highest at middle density for the variety-Xiaoyan6 in 1980s, followed by low density, and with the lowest at the maximum density; and the yields and WUE steadily increased along with the increase of planting density for the variety-Changhan58 in 2000s. We also found that the maximum yields and WUE of morden cultivar increased, but both root weight density and root length density reduced accordingly. Our findings suggest that there exists root redundancy, which is adverse for increasing yields and WUE in winter wheat in the Loess Plateau. However, this kind of redundancy reduced with varietal replacement and thus promotes the yields and WUE.

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