杨若琪 王亚娟 周佳铭 谭国娟 张艺桐 张淑艳

摘 要：为研究沙生冰草与黄花苜蓿适宜的播种比例，将沙生冰草与黄花苜蓿按照3∶1、5∶1、7∶1的比例交叉混播，以单播为对照，观测沙生冰草的株高等生长动态。结果表明：混播沙生冰草株高显著高于单播，其中7∶1的株高最高;枝条重以单播的沙生冰草最高，其次是7∶1，混播顯著低于单播;混播5∶1的枝条叶面积最高，显著高于其他各比例的沙生冰草;混播比例对沙生冰草的生长影响显著。

关键词：混播;沙生冰草;株高;枝条重;叶面积

中图分类号 S54  文献标识码 A文章编号 1007-7731（2021）18-0081-03

Effects of Mixed Planting Ratio on the Growth of Agaricum Sargassum

YANG Ruoqi et al.

（Agricultural College of Inner Mongolia University for nationalities， Tongliao 028000）

Abstract： In order to study the suitable sowing ratio between agropyron desertorum and alfalfa， cross sowing of agropyron desertorum and alfalfa was carried out according to the mixed planting ratio of 3：1， 5：1 and 7：1， and the growth dynamics of plant height of agropyron desertorum was observed with single sowing as control. The results showed that the plant height of mixed sowing was significantly higher than that of single sowing， and the plant height at 7：1 was the highest. The branch weight of monoculturing agropyron desertorum was the highest， followed by 7：1， and the branch weight of mixed planting was significantly lower than that of monoculturing. The branch and leaf area of mixed planting 5：1 was the highest， which was significantly higher than that of other proportions. Mixed-planting ratio had a significant effect on the growth of Agaricum sargassum.

Key words： Mixed seeding; Agropyron desertorum; Plant height; Heavy branches; Leaf area

混播体系的优点是生态位分布广泛，可以将环境资源充分利用，极大缓解资源压力，同时合理利用环境资源也可以获得较高生产力[1]，因此，禾本科牧草和豆科牧草混播，可以获得优质高产的牧草[2]。豆科植物和根瘤菌共生固氮的作用能改良混播草地土壤，提高人工草场的价值[3-5]，使豆科植物与禾本科植物混播草地具有高产、优质和稳定的特点，豆禾混播已成为人工草地的重要发展方向[6]。

混播比例是建立混播草地的关键技术之一，混播比例适当才能发挥混播优势。牧草特性及种植地区的差异，牧草所表现出来的生产性能有所不同[7]，使不同牧草种类混播适宜的比例有较大差别。本研究以沙生冰草（Agropyron desertorum（Fisch.）Schult.）为试验材料，探究在科尔沁沙地与黄花苜蓿（Medicago falcata L.）按不同比例混播对其生长发育规律的影响，为选择适合本地区的耐寒、耐旱混播组合提供依据，研究结果对本地区沙化退化草地修复具有现实意义。……