摘要
通过对日光温室黄瓜幼苗不同根区温度的处理 [适温 (CK) 2 1- 2 3℃、亚适温 14 - 16℃、低温 8- 10℃ ],结果表明 ,与适温处理 (CK)相比 ,亚适温和低温处理 ,(1)降低了黄瓜幼苗的株高、茎粗、叶面积、地上部干重、全株干重 ,而增加了地下部干重和根冠比 ;(2 )降低了黄瓜幼苗叶片光合色素含量、光合速率 (Pn)、气孔导度 (Gs)、胞间CO2 浓度(Ci) ,增加了叶绿素a b值。品种津春 3号 (J3)比津春 2号 (J2 )
Experiments of different root zone temperature treatments(optimal temperature CK is 21-23℃; sub-optimal temperature is 14-16℃; low temperature is 8-10℃)were carried out at seedling stage of cucumber(cucumis sativus L.) in solar greenhouse. Comparison of sub-optimal and low temperature treatments with optimal temperature treatment(CK) indicated that (1) plant height, stem thickness, leaf area, dry weight of shoot, and total dry weight of cucumber seedlings were decreased, while dry weight of root and root:shoot ratio of cucumber seedlings were increased; (2) photosynthetic pigment content, photosynthetic rate (Pn), stomatal conductance (Gs), and intercellular CO 2 concentration (Ci) of cucumber seedling leaf were decreased,but the value of chla/b increased. Cultivar Jinchun No.3(J3) showed more root resistance to low temperature stress than that of cultivar Jinchun No.2(J2).
出处
《山东农业大学学报（自然科学版）》
CSCD
北大核心
2003年第1期64-67,73,共5页
Journal of Shandong Agricultural University：Natural Science Edition
基金
山东省自然科学基金资助项目
