Yield, Protein, and Remobilization of Water Soluble Carbohydrate and Nitrogen of Three Spring Wheat Cultivars as Influenced by Nitrogen Input
Yield, Protein, and Remobilization of Water Soluble Carbohydrate and Nitrogen of Three Spring Wheat Cultivars as Influenced by Nitrogen Input
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DOI：
10.2134/agronj2010.0424
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发表时间：
2011-05-01
期刊：
影响因子：
2.1
通讯作者：
Westcott, Malvern
中科院分区：
文献类型：
--
作者：
Chen, Chengci;Han, Guoqiang;Westcott, Malvern
植物育种者尝试利用延长绿叶持续时间（EGLD）性状来提高蒙大拿州春小麦（Triticum aestivum L.）的产量。本研究的目的是调查两个具有 EGLD 的春小麦品种（Vida 和 Reeder）和一个不具有 EGLD 的春小麦品种（Outlook）的产量、蛋白质、收获指数 (HI)、水溶性碳水化合物的再利用 (WSCRM) 和氮 (NRM)、氮吸收、氮收获指数 (NHI) 和籽粒氮回收 (NRG)，这些品种受旱地和灌溉环境氮输入率的影响。 Vida 是从 Reeder 和 Scholar 杂交中选出的，与 Reeder 和 Outlook 相比，其籽粒产量更高，但蛋白质含量更低；这种产量优势可能是由于灌溉下 Vida 的 HI 较高以及花后生物量 (PABM) 积累较多所致。灌溉地的产量优势（23%）比旱地的产量优势（7-12%）更大。在旱地和灌溉地，WSCRM 对粮食产量（WSCCGY）的平均贡献度（WSCCGY）为 8% 和 12%，NRM 对粮食氮素（NRCGN）的平均贡献度分别为 67% 和 60%。没有证据表明 Reeder 和 Vida 的 WSCCGY 或 NRCGN 高于 Outlook。 WSCRM 和NRM 受到氮输入率的影响。 Vida 中的谷物蛋白质含量低于 Reeder 和 Outlook 的原因是秸秆中氮含量较高，并且 Vida 的生物量产量较高，尽管 Vida 从土壤中吸收了更多的氮。高施氮量降低了旱地和灌溉环境中所有品种的 NHI 和 NRG。
Plant breeders have attempted to use extended green leaf duration (EGLD) traits for spring wheat (Triticum aestivum L.) yield improvement in Montana. The objective of this study was to investigate the yield, protein, harvest index (HI), remobilization of water-soluble carbohydrate (WSCRM) and nitrogen (NRM), N uptake, nitrogen harvest index (NHI) and nitrogen recovery in grains (NRG) of two spring wheat cultivars with EGLD (Vida and Reeder) and one without the traits (Outlook) as influenced by N input rates at dryland and irrigated environments. Vida, selected from a cross between Reeder and Scholar, exhibited a greater grain yield but lower protein content compared with Reeder and Outlook; this yield advantage likely resulted from higher HI, as well as greater postanthesis biomass (PABM) accumulation of Vida under irrigation. The yield advantage was greater at the irrigated site (23%) than at dryland (7-12%). The average contribution of WSCRM to grain yield (WSCCGY) was 8 and 12%, and NRM to grain N (NRCGN) was 67 and 60% at the dryland and irrigated site, respectively. No evidence showed Reeder and Vida had a greater WSCCGY or NRCGN than Outlook. The WSCRM and NRM were influenced by N input rates. Lower grain protein contents in Vida than in Reeder and Outlook was attributed to higher N contents in the straw and greater biomass yields of Vida even though Vida took up more N from soil. High N application rates reduced the NHI and NRG for all cultivars at both dryland and irrigated environments.