干旱胁迫和播种方式对小扁豆生化指标与生物量的影响

Effect of drought stress and different planting models on some physiological characteristics and biomass of lentil

采用盆栽试验,对不同播种方式和水分处理下2个小扁豆品种叶片中丙二醛、脯氨酸含量及生物量进行了初步研究。结果表明,随着水分处理时间增加,2种水分处理下小扁豆叶片中丙二醛和脯氨酸含量均呈增加趋势,且从水分处理开始,低水处理小扁豆叶片中的丙二醛和脯氨酸含量均高于高水处理。播种方式对小扁豆叶片中丙二醛、脯氨酸含量也有一定影响,单播方式下,两品种小扁豆叶片中丙二醛、脯氨酸含量变化趋势基本相似,且品种龙泉的含量稍大于清水;混播方式下,品种龙泉的丙二醛含量大于清水,但脯氨酸含量则相反,为品种清水大于龙泉。地上生物量及籽粒产量在不同处理下,以品种清水显著高于龙泉,表明品种清水水分利用效率高于龙泉。通过试验分析可知,品种清水抗旱性强于龙泉,且品种清水混播优于单播,而龙泉单播优于混播。

Pot experiments of two cultivars lentils were treated with soil drying at four-six leaves under different planting models,then MDA,Pro content and biomass in leaves of lentil were measured. The experiments indicate that MDA and Pro content increase gradually with the increase of drought stress time, and MDA and Pro content under drought-stressed are higher than those under well-watered after water treatment. The variety of MDA and Pro content are distinct between two plantings. At monoculture,MDA and Pro content are close to each other;at mixture, MDA content of Longquan＇s is higher than Qingshui＇s, but the content of Pro is lower. The shoot dry weight and grain yield of Qingshui are higher than those of Longquan＇s at different treatment,so the water use efficiency of Qingshui is higher than Longquan＇s. The experiment shows the capacity of escaping drought of Qingshui is better than Longquan＇s,and the mixture is more suitable than monoculture to Qingshui, but the monoculture is more suitable than mixture to Longquan.