摘要
采用正交组合设计,研究了各生育期不同淹水处理对水稻的产量及产量构成因素的影响.结果表明:水稻开花期对洪涝胁迫最敏感,减产最为严重;其次是灌浆期和幼穗分化期;而分蘖期和成熟期淹水对产量影响相对较小.水稻在各生育期受淹,其减产程度与淹水深度、淹水天数呈极显著正相关.淹水对产量的影响主要表现为降低水稻结实率、有效穗数和每穗总粒数.
The effects of flooding on the grain yield,the yield components of rice at different growing stages (V46 and Xiangzaoxian 7) have been studied in experiments of orthogonal combination.The results are as follows:the plants flooded at flowering stage are found to be affected most severly,preceeding the panicle initiation and milky maturity stages. The damage at maximum tillering and ripening stages is found to be relatively slight.Moreover,the reduction in yield has significant positive correlations with depth and duration of flooding treatment at all developing stages. The reduction of grain yield is due to the flooding which decreases the percentage of ripened grain, the number of earbearing tillers and the number of spikelets per ear.
出处
《湖南农业大学学报(自然科学版)》
CAS
CSCD
1997年第1期50-54,共5页
Journal of Hunan Agricultural University(Natural Sciences)
基金
本研究系湖南省保险公司委托课题