Impact of field-scale nighttime air temperatures during kernel development on rice milling quality
Impact of field-scale nighttime air temperatures during kernel development on rice milling quality
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DOI：
10.1016/j.fcr.2011.03.012
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发表时间：
2011-06-14
影响因子：
5.8
通讯作者：
Mauromoustakos, Andronikos
中科院分区：
文献类型：
--
作者：
Ambardekar, Amogh A.;Siebenmorgen, Terry J.;Mauromoustakos, Andronikos
最近的研究表明，夜间气温升高可能导致白垩增加，磨矿质量下降。本研究的目的是建立一种方法来量化nats升高对大田栽培水稻白垩形成和峰值产量（pHRY）的影响。为此，研究了孟加拉、朱庇特、柏树、拉格鲁、Wells和XL723品种生殖期NTAT频率的第95百分位（NT(95)）与2007 - 2009年收获季节白垩水平和pHRYs的相关性。在R7和R8阶段，白垩含量与NT（95）呈显著正相关，孟加拉品种除外。Cypress、LaGrue、Wells和XL723的HRYs峰值在R8期与NT（95）呈线性和负相关，而Bengal和Jupiter的HRYs峰值在任何r期均与NT（95）无显著相关。尽管在品种发育的R8阶段观察到白垩水平和pHRYs与NT（95）的强相关性，但据推测，在这一阶段的水稻植株实际上表现出许多发育滞后的籽粒，并存在于R6和R7灌浆阶段，在这一阶段，nats的升高被认为对白垩水平和碾磨质量有有害影响。(C) 2011年Elsevier B.V.出版
Recent research has shown that elevated nighttime air temperatures (NTATs) may contribute to increased chalk and reduced milling quality. The objective of this study was to develop a method to quantify the effects of elevated NTATs on chalk formation and peak head rice yield (pHRY) in field-grown rice cultivars. To do so, 95th percentiles of NTAT frequencies (NT(95)) occurring during reproductive (R) stages of Bengal, Jupiter, Cypress, LaGrue, Wells, and XL723 cultivars were correlated with chalk levels and pHRYs observed during the 2007 through 2009 harvest seasons. Chalk levels were strongly correlated with NT(95) during the R7 and R8 stages for all cultivars, except Bengal. Peak HRYs of Cypress, LaGrue, Wells, and XL723 were linearly and inversely related to NT(95) occurring during the R8 stage, while pHRYs of Bengal and Jupiter showed no significant correlations with this percentile at any R-stage. Although strong correlations of chalk levels and pHRYs with NT(95) were observed during the R8 stage of cultivar development, it is speculated that rice plants classified in this stage actually exhibit many kernels that lag in development and exist in the R6 and R7 grain-filling stages, where elevated NTATs are thought to have deleterious effects on chalk levels and milling quality. (C) 2011 Published by Elsevier B.V.