新疆农业科学 ›› 2023, Vol. 60 ›› Issue (11): 2824-2832.DOI: 10.6048/j.issn.1001-4330.2023.11.026
侯钰荣(), 柯梅, 李超, 兰吉勇, 康帅, 靳俊鹏, 魏鹏()
收稿日期:
2023-03-21
出版日期:
2023-11-20
发布日期:
2023-12-07
通信作者:
魏鹏(1989-),男,新疆奇台人,助理研究员,博士,研究方向为草地生态修复,(E-mail)xkyweipeng@163.com
作者简介:
侯钰荣(1982-),女,新疆玛纳斯人,研究员,博士,研究方向为草地生态修复,(E-mail)houyurong0994@126.com
基金资助:
HOU Yurong(), KE Mei, LI Chao, LAN Jiyong, KANG Shuai, JIN Junpeng, WEI Peng()
Received:
2023-03-21
Online:
2023-11-20
Published:
2023-12-07
Correspondence author:
WEI Peng(1989-),male, native place:Qitai, Xinjiang.Research field:Ecological restoration of grassland,(E-mail)xkyweipeng@163.com
Supported by:
摘要:
【目的】 研究围栏封育和自由放牧对伊犁绢蒿(Seriphidium transiliense)生长规律和内源激素水平的影响,分析蒿属荒漠草地围栏封育效果,为退化的蒿属荒漠草地生态系统中植被恢复研究提供理论参考依据。【方法】 以围栏封育和自由放牧条件下的伊犁绢蒿为研究对象,利用植物学、植物生理学和草地管理学中有关植物形态、植物内源激素和“四度一量”方法,计数统计伊犁绢蒿高度PH、盖度PC、密度PD、生物量B、一级分枝PBN和二级分枝SBN,采取烘干法测定单株叶片干重、单株茎干重和单株根系干重,采取靶向测定内源激素(细胞分裂素IAA、脱落酸ABA、生长素CTK、赤霉素GAs、乙烯ETH)含量,每处理设置3条样线,每样线测定40个样方,对比分析各项指标,归纳总结伊犁绢蒿在两个处理下的生长规律和内源激素变化。【结果】 围栏封育条件下的伊犁绢蒿株高是自由放牧株高的2.57倍,生物量是自由放牧的29.73倍,一级分枝是自由放牧的7倍,单株叶片干重、茎干重和根系干重分别是自由放牧的7.87倍、5.21倍和5.64倍;围栏封育和自由放牧对伊犁绢蒿叶片CTK和ABA含量影响较大,且差异显著(P<0.05);对伊犁绢蒿茎内源激素含量除了赤霉素(GAs)在2个处理间差异不显著以外,其他指标在两个处理间差异均极显著(P<0.01)。围栏封育对伊犁绢蒿根系内源激素影响较小,仅ETH含量在二者之间差异显著(P<0.05)。【结论】 围栏封育4年,不仅使伊犁绢蒿形态特征、生长趋势与自由放牧的小型化和矮化形成鲜明对比,尤其叶片和茎的IAA和CTK含量与植株高度和一级分枝数之间关系更密切。
中图分类号:
侯钰荣, 柯梅, 李超, 兰吉勇, 康帅, 靳俊鹏, 魏鹏. 围栏封育和自由放牧对伊犁绢蒿生长规律和内源激素的影响[J]. 新疆农业科学, 2023, 60(11): 2824-2832.
HOU Yurong, KE Mei, LI Chao, LAN Jiyong, KANG Shuai, JIN Junpeng, WEI Peng. Effects of fencing and free grazing on growth patterns and endogenous hormones of Seriphidium transiliense[J]. Xinjiang Agricultural Sciences, 2023, 60(11): 2824-2832.
项目 Items | 高度 PH (cm) | 盖度 PC (%) | 密度 PD (株/m2) | 生物量 B (g/m2) | 一级分枝 PBN (个/株) | 二级分枝 SBN (个/株) | 叶片干重 (g/株) | 茎干重 (g/株) | 根系干重 (g/株) |
---|---|---|---|---|---|---|---|---|---|
围栏封育 Enclosure | 17.50±2.07 | 45±5.10 | 16±1.07 | 174.83±5.88 | 14±1.14 | 19±1.52 | 2.44±0.10 | 9.12±1.01 | 11.44±1.01 |
自由放牧 Free-grazing | 6.81±0.77 | ≤1±0.01 | 2±0.42 | 1.20±0.11 | 2±0.02 | 0±0.00 | 0.31±0.02 | 1.75±0.03 | 2.03±0.04 |
显著性(P) Significance | 0.001 | 0.000 | 0.001 | 0.000 | 0.001 | 0.000 | 0.001 | 0.001 | 0.000 |
表1 围栏封育和自由放牧下伊犁绢蒿生长趋势变化
Tab.1 Effects of fenced enclosure and free grazing on growth trend of Seriphidium transiliense
项目 Items | 高度 PH (cm) | 盖度 PC (%) | 密度 PD (株/m2) | 生物量 B (g/m2) | 一级分枝 PBN (个/株) | 二级分枝 SBN (个/株) | 叶片干重 (g/株) | 茎干重 (g/株) | 根系干重 (g/株) |
---|---|---|---|---|---|---|---|---|---|
围栏封育 Enclosure | 17.50±2.07 | 45±5.10 | 16±1.07 | 174.83±5.88 | 14±1.14 | 19±1.52 | 2.44±0.10 | 9.12±1.01 | 11.44±1.01 |
自由放牧 Free-grazing | 6.81±0.77 | ≤1±0.01 | 2±0.42 | 1.20±0.11 | 2±0.02 | 0±0.00 | 0.31±0.02 | 1.75±0.03 | 2.03±0.04 |
显著性(P) Significance | 0.001 | 0.000 | 0.001 | 0.000 | 0.001 | 0.000 | 0.001 | 0.001 | 0.000 |
图1 围栏封育和自由放牧下伊犁绢蒿叶片内源激素变化 注:不同小写字母表示差异显著(P<0.05),不同大写字母表示差异极显著(P<0.01)。下同
Fig.1 Effects of fencing and free grazing on endogenous hormones in leaves of Seriphidium transiliense Note: different lowercase letters represent significant difference (P < 0.05),Different uppercase letters represent extremely significant difference (P < 0.01).The same as below
图4 伊犁绢蒿叶片内源激素含量与植株生长趋势关联热图
Fig.4 Heat map of correlation between leaf blade endogenous hormone content and plant growth trend of Seriphidium transiliense
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