苗期不同土壤水分状况的秋黄瓜生理反应

对苗期不同土壤水分状况下秋黄瓜的生理反应和前期产量进行了研究。结果表明 ,苗期不同土壤水分状况显著影响了秋黄瓜的生长动态。土壤含水量为 60 %～ 75 %田间持水量 (θF)的植株叶片蒸腾和光合速率均居于较高水平 ,前期产量最高 ;5 0 %～ 60 % (θF)的植株与前者差异不显著 ,但均显著高于 75 %～ 85 % (θF)和 85 %～ 95 % (θF)的处理 ,其离体叶片在 1 .5～ 2 .0 h之间的失水速率最低。 75 %～ 85 % (θF)植株生长迅速 ,前期产量较低 ;85 %～ 95 % (θF)植株生长受限。

The Physiological Reaction of Different Soil Water Status During Seedling Stage on Autumn Cucumber

The field experiment of the physiological reaction and prophase yields under different soil water status during seedling of autumn cucumber was carried out at shangqiu experimental area.The results showed that the different soil water status remarkably influenced the growth dynamics of autumn cucumber. At soil water content 60%～75% field water capacity ( θ F ), the transpiration rate and photosynthetic rate of plants were higher then others, and the prophase yields were the highest. The differences of the plants at 50%～60%( θ F ) from the former were not marked, but all remarkably higher than those at 75%～85%( θ F )and 85%～95%( θ F ).The leaf water deviate rate of leaves parting from plants was the lowest during 1.5～2.0 h.The plants at 75%～85%( θ F )growled rapidly, but the prophase yields were lower. Those at 85%～95%( θ F )were limited at growth.