1 a生角果木幼苗对海水淹没时间的生长适应性研究

doi:10.13466/j.cnki.lczyyj.2025.01.010

摘要/Abstract

摘要： 为提高角果木苗木造林成活率,探究不同海水淹没时间对1 a生角果木幼苗的影响,采用海水淹没时间控制试验对1 a生角果木幼苗进行处理。角果木幼苗经0.00、4.00、6.00、8.00、10.00、12.00、14.00、16.00、18.00、20.00、22.00 h/d海水淹没处理后,测定其形态和生理指标,并采用主成分分析法探究较适宜1 a生角果木幼苗生长的海水淹没时间。结果表明:1)1 a生角果木幼苗苗高增长量(ΔH)、基径增长量(ΔD)、生物量干质量增长量(ΔW)均随海水淹没时间的延长而先增后减,其中8.00 h/d处理测得数值最大;2)叶绿素(a+b)[Chl(a+b)]、叶绿素(a)[Chl(a)]、叶绿素(b)[Chl(b)]含量随海水淹没时间的延长先增后减,其中8.00 h/d处理测得数值最大;3)丙二醛(MDA)含量、脯氨酸(PRO)含量均随海水淹没时间的延长先减后增,其中8.00 h/d处理测得数值最小;4)超氧化物歧化酶(SOD)活性随海水淹没时间的延长而增强;5)主成分分析表明,8.00 h/d处理综合得分最高,为3.361。因此,长时间或无海水淹没处理对1 a生角果木幼苗生长具有明显抑制作用,较适宜1 a生角果木幼苗生长的海水淹没时间为8.00 h/d。该研究结果揭示了适宜角果木幼苗生长的海水淹没时间,对角果木苗木造林具有一定的指导意义。

关键词: 角果木, 海水淹没时间, 形态指标, 生理指标, 主成分分析

Abstract:

In order to improve the survival rate of Ceriops tagal(Perr.)C.B.Rob.seedlings and explore the effects of different seawater submergence time on one-year-old C.tagal seedlings,one-year C.tagal seedlings were treated with seawater submergence time control experiments.C.tagal seedlings were submerged in seawater for 0.00,4.00,6.00,8.00,10.00,12.00,14.00,16.00,18.00,20.00,22.00 h/d.The morphological and physiological indexes of the seedlings were measured,and principal component analysis was used to analyze the suitable seawater submergence time for the growth of 1-year C.tagal seedlings.The results show that:1)The plantheight growth(ΔH),basal diameter growth(ΔD),and biomass dry weight growth(ΔW)of the seedlings increased first and then decreased with the prolongation of seawater submergence time,and the maximum values were measured at 8.00 h/d treatment.2)The Chl(a+b),Chl(a),and Chl(b)contents increased first and then decreased with the prolongation of seawater submergence time,and the maximum value was measured at 8.00 h/d treatment.3)The contents of malondialdehyde and proline decreased first and then increased with the prolongation of seawater submergence time,and the values measured at 8.00 h/d were the smallest.4)Superoxide dismutase activity increased with the extension of seawater submergence time.5)Principal component analysis showed that the comprehensive score of 8.00 h/d treatment was the highest,which was 3.361.It can be seen that long-term or no seawater submergence treatment has a significant inhibitory effect on the growth of 1-year C.tagal seedlings.Therefore,the suitable seawater submergence time for the growth of 1-year C.tagal seedlings was 8.00 h/d.The results revealed the suitable seawater submergence time for the growth of C.tagal seedlings,and had certain guiding significance for the afforestation of C.tagal seedlings.

Key words: Ceriops tagal, seawater submergence time, morphological indicators, physiological indicators, principal component analysis

中图分类号:

Q945.3

张方兰, 黎肇家, 吴少忠. 1 a生角果木幼苗对海水淹没时间的生长适应性研究[J]. 林草资源研究, 2025,(1): 84-94.

ZHANG Fanglan, LI Zhaojia, WU Shaozhong. Growth adaptability of one-year Ceriops tagal seedlings to seawater submergence time[J]. Forest and Grassland Resources Research, 2025,(1): 84-94.

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处理	H₀/cm	H₁/cm	ΔH/cm	D₀/mm	D₁/mm	ΔD/mm
CK	11.68±0.87a	34.73±1.13a	23.05±0.67abc	4.23±0.19a	6.26±0.32ab	2.03±0.31ab
T₄	12.62±0.52a	35.95±0.68a	23.33±0.64abc	4.12±0.09a	6.19±0.34ab	2.07±0.40ab
T₆	10.28±1.48a	34.96±2.71a	24.68±2.42ab	4.05±0.08a	6.75±0.23a	2.69±0.21a
T₈	8.85±1.48a	36.45±2.47a	27.60±2.43a	4.29±0.37a	7.07±0.34a	2.77±0.20a
T₁₀	9.53±1.41a	31.87±0.37ab	22.34±0.77bc	4.52±0.08a	7.05±0.36a	2.52±0.36a
T₁₂	8.09±1.08a	29.07±1.03b	20.98±0.40bc	4.08±0.08a	6.14±0.09ab	2.06±0.14ab
T₁₄	8.45±0.97a	28.76±1.72b	20.31±2.15bc	4.34±0.31a	6.49±0.16a	2.15±0.20ab
T₁₆	7.68±0.38a	27.48±0.32b	19.80±0.36bc	4.33±0.39a	6.47±0.17a	2.14±0.07ab
T₁₈	8.60±1.34a	29.42±1.62b	20.82±1.56bc	4.00±0.06a	6.15±0.28ab	2.15±0.25ab
T₂₀	7.75±0.31a	27.74±1.51b	19.99±1.46bc	3.94±0.18a	5.48±0.34b	1.53±0.23b
T₂₂	8.60±1.34a	27.41±0.71b	18.81±0.59c	3.89±0.04a	5.46±0.22b	1.57±0.21b

处理	W₀	W₁	ΔW
CK	11.162±0.741a	33.183±1.896bc	22.021±1.179bc
T₄	11.308±1.352a	32.203±3.713bc	20.895±2.418c
T₆	12.775±1.179a	43.166±0.597a	30.391±1.008ab
T₈	11.019±0.290a	44.530±4.349a	33.510±4.505a
T₁₀	12.638±0.769a	39.050±5.455ab	26.411±5.011abc
T₁₂	11.531±0.422a	30.553±4.123b	19.021±4.495c
T₁₄	10.883±0.503a	27.796±1.319bc	16.912±1.282cd
T₁₆	11.124±0.403a	27.960±1.735bc	16.835±1.415cd
T₁₈	10.736±0.466a	28.020±2.920bc	17.283±3.210cd
T₂₀	10.830±0.758a	19.516±2.076c	8.686±1.317d
T₂₂	10.739±0.294a	19.590±1.346c	8.850±1.269d

主成分	初始特征值 (C)	方差贡献率 (L)/%	累积方差贡献率(R)%
PC1	6.671	74.12	74.12
PC2	1.425	15.83	89.95

指标	PC1		PC2
指标	载荷 (A)	标准化变量系数(Y)	载荷 (A)	标准化变量系数(Y)
ΔH(X₁)	0.839	0.325	-0.260	-0.218
ΔD(X₂)	0.942	0.365	-0.021	-0.018
ΔW(X₃)	0.947	0.367	-0.213	-0.178
MDA含量(X₄)	-0.858	-0.332	0.214	0.179
SOD活性(X₅)	-0.663	-0.257	0.684	0.573
PRO含量(X₆)	-0.930	-0.360	0.032	0.027
Chl(a+b)含量(X₇)	0.896	0.347	0.426	0.357
Chl(a)含量(X₈)	0.654	0.253	0.743	0.622
Chl(b)含量(X₉)	0.955	0.370	0.250	0.209

处理	PC1得分(Z₁)	PC2得分(Z₂)	综合得分(B)
CK	-1.143	-3.453	-1.550
T₄	1.150	-0.415	0.875
T₆	3.070	0.379	2.597
T₈	4.026	0.250	3.361
T₁₀	2.163	0.098	1.799
T₁₂	0.663	0.536	0.640
T₁₄	-0.109	0.616	0.019
T₁₆	-0.884	0.326	-0.671
T₁₈	-1.115	0.186	-0.886
T₂₀	-3.319	0.849	-2.586
T₂₂	-4.503	0.628	-3.600