Effects of low temperature and shading during flowering on the yield components in soybeans
Effects of low temperature and shading during flowering on the yield components in soybeans
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DOI：
10.1626/pps.6.17
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发表时间：
2003-03-01
影响因子：
2.5
通讯作者：
Yumoto, S
中科院分区：
文献类型：
--
作者：
Kurosaki, H;Yumoto, S
日本北方的北海道几乎每四年就有一次寒冷天气对农业造成的损害。寒冷天气对大豆的损害[Glycine max（L.）在开花期间尤其严重，是由低温和阳光不足引起的。因此，应从这两个方面来分析损害。分析了花期低温和遮荫对两个大豆品种（cv。耐冷性优良的品种早光和品种。将大豆植株暴露于18 ℃昼/13 ℃夜的低温下，在四周的花期期间，不进行低温处理而进行遮荫（50%），或在低温下进行遮荫。对照植物保持在正常条件下。结果表明，丰牧县低温冷害的主要原因是低温使单株荚数严重减少。然而，遮荫也减少了两个品种的单株荚数。所有的产量构成因素的审查，减少了寒冷的天气更严重的丰牧比早光。此外，遮荫结合低温处理造成更大的伤害，在早光和丰木森比任何一个单独的低温或遮荫处理。
Northern Japan, Hokkaido has cold weather damage in agriculture almost every four years. Cold weather damage to soybeans [Glycine max (L.) Merr] during flowering is especially severe and is caused by both low temperature and insufficient sunlight. Therefore, the damage should be analyzed from both aspects. We analyzed the effects of low temperature and shading during the flowering season on seed yield and yield components in two varieties of soybeans : cv. Hayahikari, an excellent cold weather tolerant variety, and cv. Toyomusume, a cold weather sensitive variety.The soybean plants were exposed to a low temperature of 18degreesC day/13degreesC night, shaded (50%) without low temperature treatment, or shaded at a low temperature, during the four-week flowering season. The control plants were kept under normal conditions. The results indicated that cold weather damage is mainly caused by the low temperature, which severely reduced the number of pods per plant, in Toyomusume. However, shading also reduced the number of pods per plant in both varieties. All of the yield components examined were reduced by cold weather more severely in Toyomusume than in Hayahikari. Furthermore, shading combined with low temperature treatment caused greater damage in both Hayahikari and Toyomusume than either a low temperature or shading treatment alone.