草业学报 ›› 2022, Vol. 31 ›› Issue (7): 133-143.DOI: 10.11686/cyxb2021351
• 研究论文 • 上一篇
刘彩婷1,2, 毛丽萍1,2, 阿依谢木1,2,3, 于应文1,2,3, 沈禹颖1,2,3()
收稿日期:
2021-09-22
修回日期:
2022-01-27
出版日期:
2022-07-20
发布日期:
2022-06-01
通讯作者:
沈禹颖
作者简介:
E-mail: yy.shen@lzu.edu.cn基金资助:
Cai-ting LIU1,2, Li-ping MAO1,2, Ayixiemu1,2,3, Ying-wen YU1,2,3, Yu-ying SHEN1,2,3()
Received:
2021-09-22
Revised:
2022-01-27
Online:
2022-07-20
Published:
2022-06-01
Contact:
Yu-ying SHEN
摘要:
为探究混播群落中紫花苜蓿(MS)抗寒生长表型及对低温的响应特征,设置紫花苜蓿与垂穗披碱草4个混播比例(紫花苜蓿占比分别为100%、70%、50%和30%,即MS100%、MS70%、MS50%和MS30%)。在温室条件下,播种定苗经25 ℃育苗45 d后,转入15 ℃培养10 d,再转入5 ℃培养10 d,测定分析2个低温阶段混播群落中紫花苜蓿的生长抗寒生理指标。结果表明:从生长特征看,15 ℃阶段,MS70%紫花苜蓿叶宽长比最小,MS50%紫花苜蓿地上、地下和群落生物量最高,且紫花苜蓿根颈直径最大,分别较MS100%和MS70%高42.8%和46.8%;5 ℃阶段,紫花苜蓿地上、地下及群落生物量仍以MS50%最高,MS50%和MS30%下紫花苜蓿的株高、分枝数、根颈直径、主根长度等表现较佳。从生理特征看,紫花苜蓿的根系较叶片对低温敏感,15 ℃阶段,MS70%、MS50%和MS30%紫花苜蓿根系可溶性糖含量较MS100%提高13.1%、25.2%和14.0%,MS30%的根系脯氨酸含量比MS100%高32.9%;5 ℃阶段,MS50%紫花苜蓿根系可溶性糖含量最高,MS50%和MS30%可溶性蛋白及脯氨酸含量均高于MS100%和MS70%。基于紫花苜蓿生长生理特征综合评价及最优混播比例筛选得知,混播能提升紫花苜蓿生长生理特征对低温的适应,30%~50%的紫花苜蓿混播占比为研究区紫花苜蓿-禾草混播草地建植的适宜比例。
刘彩婷, 毛丽萍, 阿依谢木, 于应文, 沈禹颖. 紫花苜蓿与垂穗披碱草混播比例对其抗寒生长生理特征的影响[J]. 草业学报, 2022, 31(7): 133-143.
Cai-ting LIU, Li-ping MAO, Ayixiemu, Ying-wen YU, Yu-ying SHEN. Effects of alfalfa (Medicago sativa) proportion on growth and physiological characteristics of cold resistance in mixtures with Elymus nutans[J]. Acta Prataculturae Sinica, 2022, 31(7): 133-143.
图2 2个温度阶段紫花苜蓿在不同混播占比下的株高和分枝数不同小写字母表示同一温度处理下不同占比之间差异显著(P<0.05)。下同。
Fig.2 Plant height and branch number of alfalfa at two temperature stages under different mixed proportionDifferent lowercase letters indicate significant differences between different proportion for the same temperature treatment at the 0.05 level. The same below.
指标 Index | 处理Treatment | |||
---|---|---|---|---|
MS100% | MS70% | MS50% | MS30% | |
隶属值 Membership value | 0.26 | 0.37 | 0.62 | 0.53 |
排序 Ranking | 4 | 3 | 1 | 2 |
表1 不同紫花苜蓿占比下各指标综合评价隶属值
Table 1 Comprehensive evaluation membership value of each index under different proportion of alfalfa
指标 Index | 处理Treatment | |||
---|---|---|---|---|
MS100% | MS70% | MS50% | MS30% | |
隶属值 Membership value | 0.26 | 0.37 | 0.62 | 0.53 |
排序 Ranking | 4 | 3 | 1 | 2 |
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