花荚期基因型不同的大豆品种症青发病程度评价及原因分析

大豆症青现象是近些年困扰黄淮海大豆生产的重要问题，但影响大豆症青发生的原因一直不是很明确。研究以16个花荚期进程不同的大豆品种为研究材料，分析了症青严重程度与花荚期天气、生育期进程的相关性。结果表明，在试验年度条件下，所有大豆品种均发生了严重的症青，品种间瘪荚率的差异达到显著或极显著水平。通过对症青株率与开花期和结荚期持续天数、高温日数、降水量、日照时数、平均湿度、每天14点平均气温、品种生育期等13项指标的相关性分析发现，除了症青株率与开花期降水量呈显著负相关外，与花荚期高温等其他因素均不相关。大豆生产上应防止花荚期干旱，以降低大豆症青的风险。

Evaluation of Staygreen Syndrome Severity in Soybean Varieties of Different Genotypes at Flowering and Podding Stages

The soybean staygreen syndrome(SGS) has becaome a significant challenge to soybean production in Huanghe-Huaihe-Haihe area. but the reasons for the occurrence of SGS was not clear. This study aims to investigate the severity of SGS in 16 soybean cultivars with varying processes at the flowering and podding stages and to analyze its correlation with weather and growth processes.The results showed that all soybean varieties suffered from severe SGS, with significant differences in the shriveled pod rate among the varieties. Through correlational analysis of the rate of SGS with thirteen indicators, including duration of flowering and podding setting, high temperature days, precipitation, sunshine hours, average humidity, average temperature at 2 p.m. daily, and variety growth period. After analyzing the data, we observed a significant negative correlation between the rate of SGS and precipitation during the flowering stage. However, no significant correlation was found between the rate of SGS and other factors such as high temperature during the flowering and podding stages. The study suggests that drought prevention during the flowering and podding stage is crucial in reducing the risk of SGS in soybean production..