Alteration in yield and oil quality traits of winter rapeseed by lodging at different planting density and nitrogen rates.
Alteration in yield and oil quality traits of winter rapeseed by lodging at different planting density and nitrogen rates.
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不同种植密度和氮肥用量下，冬油菜籽的产量和油质性状因虫害而发生变化。
DOI：
10.1038/s41598-017-18734-8
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发表时间：
2018-01-12
影响因子：
4.6
通讯作者：
Zhou G
中科院分区：
文献类型：
--
作者：
Khan S;Anwar S;Kuai J;Noman A;Shahid M;Din M;Ali A;Zhou G
倒伏是影响油菜产量、品质和收获能力的主要因素之一。本研究定量分析了不同施氮量和种植密度对油菜倒伏产量损失、脂肪酸组成和油质的影响。2014-2017年通过田间试验，研究了不同密度和施氮量下花后10、20和30 d人工诱导倒伏角度（0°、30°、60°和90°）的效应。施肥/密度组合N270D45的产量和种子质量最高。倒伏时机和倒伏角度对产量影响显著。开花后10 d诱导的90°倒伏对产量、生物量和光合作用的影响最大。高施氮量籽粒产量损失较大，以N360D45最大。倒伏通过增加硬脂酸和棕榈酸含量降低了籽油含量，改变了籽油脂肪酸组成，降低了亚油酸和亚麻酸含量，增加了芥酸和硫代葡萄糖苷含量，使籽油品质恶化。因此，选择适宜的施氮水平和种植密度可以减少倒伏导致的产量损失和含油量降低。
Lodging is a factor that negatively affects yield, seed quality, and harvest ability in winter rapeseed (Brassica napus L.). In this study, we quantified the lodging-induced yield losses, changes in fatty acid composition, and oil quality in rapeseed under different nitrogen application rates and planting densities. Field experiments were conducted in 2014–2017 for studying the effect of manually-induced lodging angles (0°, 30°, 60°, and 90°), 10, 20 and 30 d post-flowering at different densities and nitrogen application rates. The fertilization/planting density combination N270D45 produced the maximum observed yield and seed quality. Timing and angle of lodging had significant effects on yield. Lodging at 90° induced at 10 d post-flowering caused the maximum reduction in yield, biomass, and silique photosynthesis. Seed yield losses were higher at high N application rates, the maximum being at N360D45. Lodging decreased seed oil content and altered its fatty acid composition by increasing stearic and palmitic acid content, while decreasing linoleic and linolenic acid content, and deteriorating oil quality by increasing erucic acid and glucosinolate content. Therefore, lodging-induced yield loss and reduction in oil content might be reduced by selecting optimum N level and planting density.
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影响因子：
6.6
作者：
Hu, Qiong;Hua, Wei;Wang, Hanzhong
通讯作者：
Wang, Hanzhong
影响因子：
5.8
作者：
Berry, P. M.;Spink, J.
通讯作者：
Spink, J.
影响因子：
2.5
作者：
Hao, XY;Chang, C;Travis, GJ
通讯作者：
Travis, GJ
影响因子：
2.6
作者：
BAYLIS, AD;WRIGHT, ITJ
通讯作者：
WRIGHT, ITJ
影响因子：
2
作者：
Kadkhodaie, Azam;Razmjoo, Jamshid;Pessarakli, Mohammad
通讯作者：
Pessarakli, Mohammad