Delayed Planting Affects Seed Yield, Biomass Production, and Carbohydrate Allocation in Canola (Brassica napus)
文献类型: 外文期刊
作者: Hua, Shuijin 1 ; Lin, Baogang 1 ; Hussain, Nazim 3 ; Zhang, Yaofeng 1 ; Yu, Huasheng 1 ; Ren, Yun 2 ; Ding, Houdong 1 ; Z 1 ;
作者机构: 1.Zhejiang Acad Agr Sci, Inst Crop & Nucl Technol Utilizat, Hangzhou, Zhejiang, Peoples R China
2.Huzhou Acad Agr Sci, Huzhou 313000, Peoples R China
3.Zhejiang Univ, Key Lab Crop Germplasm Resources Zhejiang Prov, Coll Agr & Biotechnol, Hangzhou 310058, Zhejiang, Peoples R China
关键词: Biomass;Carbohydrate allocation;Planting date;Yield
期刊名称:INTERNATIONAL JOURNAL OF AGRICULTURE AND BIOLOGY ( 影响因子:0.822; 五年影响因子:0.906 )
ISSN: 1560-8530
年卷期: 2014 年 16 卷 4 期
页码:
收录情况: SCI
摘要: Delayed planting causes substantial reduction in crop yield; however, information on physiological regulation of yield reduction is scarce. A field experiment was conducted using four planting dates as treatments, namely, early (September 15); optimal (September 25); late (October 25); and very late (November 15) in 2011 and 2012 to unravel the impact of delayed planting date on canola yield and physiological indexes, including tissue dry matter and carbohydrate profile partitioning. Optimal planting date was considered as a control. Results showed that canola seed yields on late and very late planting dates were severely decreased by 30% and 70%, respectively, compared with those on the optimal planting date because of a decrease in the number of branches and siliques per plant and seed weight. Delayed sowing reduced the inflorescence productivity due to less biomass from initial flowering. Inflorescence sugar profile including fructose, glucose, and sucrose showed more content on the late planting than that on the early and optimal planting date at 28 days after anthesis (DAA) (peak point) indicating they were possibly assigned to gain more biomass. However, starch content in the inflorescence on the early and optimal planting date was much higher than that in the late plantation at 28 DAA, indicating that the photoassimilates were mainly used as seed reserves such as lipids. (C) 2014 Friends Science Publishers
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