【摘要】 为筛选适宜西北葡萄园遮荫地区栽培的紫花苜蓿品种,设置R0、R1、R2、R3(即全光照、全光照的60%、30%、10%)4个遮荫梯度,对国内外7个不同紫花苜蓿品种进行了地上部生长及生理特性的比较研究。结果表明:遮荫处理的苜蓿品种间株高存在较大差异;叶面积、叶片干重和叶片数随光照减弱而显著下降(P<0.05);相对生长速率、可溶性糖含量、叶绿素a/b值随遮荫强度的增大而降低;头茬产草量随遮荫强度的增大而大幅降低,巨人和皇后降幅较小。综合分析,在与试验地生境相似的西北遮荫地区,适宜种植的紫花苜蓿品种有皇后、巨人、苜蓿王等,但其耐荫有相对性,遮荫强度以不超过50%为宜。更多还原

【Abstract】 In order to select the suitable alfalfa varieties for the shade areas in vineyard of Northwest, R0,R1,R2,R3(full light,60% of full light,30% of full light,10% of full light)four levels of shading intensity were set in the experiment to study the growth and physiological characteristics of seven domestic and foreign alfalfa varieties.The results showed that:there was a big difference in height of alfalfa among cultivars under shading;Leaf area,leaf dry weight and leaves number reduced significantly with the decrease of light intensity;relative growth ratio,soluble sugar content,chlorophyll a/b decreased with the increase of shading intensity.The first crop of grass yield decreased significantly with the increasing of shading,AmeriStand and Queen declined less than others.In summary,the suitable alfalfa cultivar for plantation were Queen,Alfaking and AmeriStand in the northwest area where habitat was similar with habitat of experimental site,but the shading ability is relative and the shading intensity could not exceed 50%.更多还原