草业学报 ›› 2025, Vol. 34 ›› Issue (11): 184-194.DOI: 10.11686/cyxb2024501
• 研究论文 • 上一篇
孙诗炫1(
), 王群森1, 杨志民1, 范宁丽1, 郝田1, 刘南清2, 于景金1(
)
收稿日期:2024-12-23
修回日期:2025-03-10
出版日期:2025-11-20
发布日期:2025-10-09
通讯作者:
于景金
作者简介:E-mail: jingjin_yu@126.com基金资助:
Shi-xuan SUN1(
), Qun-sen WANG1, Zhi-min YANG1, Ning-li FAN1, Tian HAO1, Nan-qing LIU2, Jing-jin YU1(
)
Received:2024-12-23
Revised:2025-03-10
Online:2025-11-20
Published:2025-10-09
Contact:
Jing-jin YU
摘要:
选育能够耐受夏季高温高湿的苇状羊茅是气候过渡带地区延长牧草青绿期、满足草牧业可持续发展的重要途径之一。本研究以前期通过杂交育种自主培育的3份多分蘖牧草型苇状羊茅新品种“南牧1号”“南牧2号”“南牧3号”为试验材料,以生产上广泛使用的商业品种飞度(Fit)为对照,利用人工气候室开展环境因素控制试验模拟热胁迫,探究热胁迫(38 ℃/33 ℃,日/夜)及热后恢复条件下各份材料的生理、生长及营养成分的变化。结果表明,热胁迫使4份材料的电解质渗漏率(EL)上升,叶片相对含水量(RWC)、叶绿素含量(Chl)、净光合速率(Pn)下降,但3个新品种相比于对照品种均显著抑制了EL的上升及RWC、Chl和Pn的下降,说明新品种的耐热能力优于对照品种,且同时具有较好的热后恢复能力。在产量和品质方面,3个新品种的分蘖多、叶量丰富、茎叶比低、适口性好、粗蛋白含量高、品质佳,其中“南牧2号”品质最优。综上可知,3个新品种均是耐热、分蘖多、叶量丰富的高产优质牧草,能够在江苏等气候过渡带地区种植栽培。
孙诗炫, 王群森, 杨志民, 范宁丽, 郝田, 刘南清, 于景金. 自主选育苇状羊茅新品种耐热及热后恢复能力评价[J]. 草业学报, 2025, 34(11): 184-194.
Shi-xuan SUN, Qun-sen WANG, Zhi-min YANG, Ning-li FAN, Tian HAO, Nan-qing LIU, Jing-jin YU. Evaluation of heat tolerance and post-heat recovery capacity of new varieties of tall fescue[J]. Acta Prataculturae Sinica, 2025, 34(11): 184-194.
图1 热胁迫及热后恢复对苇状羊茅电解质渗漏率和相对含水量的影响飞度(CK)、南牧1号(CK)、南牧2号(CK)、南牧3号(CK)表示对照温度组(25 ℃/20 ℃),飞度(H)、南牧1号(H)、南牧2号(H)、南牧3号(H)表示热胁迫处理组(38 ℃/33 ℃),re-3、re-6、re-9表示热后恢复天数,竖线代表不同处理间的最小差异(P<0.05),下同。Fit (CK), Nanmu NO.1 (CK), Nanmu NO.2 (CK), and Nanmu NO.3 (CK) represent the control groups (25 ℃/20 ℃); Fit (H), Nanmu NO.1 (H), Nanmu NO.2 (H), and Nanmu NO.3 (H) represent the treated groups (38 ℃/33 ℃); re-3, re-6 and re-9 indicate 3, 6, and 9 days of post-heat recovery, respectively. Vertical bars means the least significant difference (LSD) among treatments (P<0.05), the same below.
Fig.1 Effects of heat stress and post-heat recovery on electrolyte leakage and leaf relative water content in tall fescue
图3 热胁迫及热后恢复对苇状羊茅生长的影响不同小写字母代表不同品种间差异显著(P<0.05),下同。Different lowercase letters indicate significant differences among different varieties (P<0.05). The same below.
Fig.3 Effects of heat stress and post-heat recovery on plant growth in tall fescue
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