Effects of Lodging at Different Filling Stages on Rice Grain Yield and Quality

doi:10.3969/j.issn.1001-7216.2011.04.010

Abstract

Abstract: The effects of lodging at different filling stages on grain yield and rice quality were investigated with a twoline hybrid rice Liangyoupeijiu and a conventional japonica rice CY6. The results showed that except for brown rice rate, ratio of length to width, gelatinization temperature and gel consistency, almost all indices for yield and rice quality were significantly influenced by lodging and thus deteriorated. Regression analysis suggested that, lodging of CY6 and Liangyoupeijiu one day earlier could cause 2.71% and 2.66% of yield loss, 1.8 and 2.1 percentage points decrease of seed setting rate, 0.32 and 0.26 g reduction of 1000grain weight, 0.097 and 0.155 percentage points decrease of milled rice rate, also it increased chalky grain rate by 0.13 and 0.27 percentage points, and protein content by 0.021 and 0.024 percentage points, and subsequently lowered the eating quality.

Key words: rice, lodging, filling stage, yield, rice quality

摘要： The effects of lodging at different filling stages on grain yield and rice quality were investigated with a twoline hybrid rice Liangyoupeijiu and a conventional japonica rice CY6. The results showed that except for brown rice rate, ratio of length to width, gelatinization temperature and gel consistency, almost all indices for yield and rice quality were significantly influenced by lodging and thus deteriorated. Regression analysis suggested that, lodging of CY6 and Liangyoupeijiu one day earlier could cause 2.71% and 2.66% of yield loss, 1.8 and 2.1 percentage points decrease of seed setting rate, 0.32 and 0.26 g reduction of 1000grain weight, 0.097 and 0.155 percentage points decrease of milled rice rate, also it increased chalky grain rate by 0.13 and 0.27 percentage points, and protein content by 0.021 and 0.024 percentage points, and subsequently lowered the eating quality.

关键词: rice, lodging, filling stage, yield, rice quality

CLC Number:

S511.01

LANG You-Zhong*, YANG Xiao-Dong, WANG Mei-E, ZHU Qing-Sen. Effects of Lodging at Different Filling Stages on Rice Grain Yield and Quality[J]. Chinese Journal of Rice Science, 2011, 25(4): 407-412.

郎有忠*, 杨晓东, 王美娥, 朱庆森 . 结实阶段不同时期倒伏对水稻产量及稻米品质的影响[J]. 中国水稻科学, 2011, 25(4): 407-412.

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