南京林业大学学报(自然科学版) ›› 2024, Vol. 48 ›› Issue (5): 147-155.doi: 10.12302/j.issn.1000-2006.202210003
收稿日期:
2022-10-01
修回日期:
2022-12-17
出版日期:
2024-09-30
发布日期:
2024-10-03
作者简介:
孙慧珍(sunhz-cf@nefu.edu.cn),副教授。
基金资助:
SUN Huizhen(), LI Shan, LIU Shanshan, WANG Xingchang
Received:
2022-10-01
Revised:
2022-12-17
Online:
2024-09-30
Published:
2024-10-03
摘要:
【目的】探究东北地区生态习性各异的山杨(Populus davidiana)、水曲柳(Fraxinus mandshurica)和东北红豆杉(Taxus cuspidata)地上地下器官氮(N)、磷(P)养分分配模式,为深入揭示树种间养分分配策略与权衡关系提供理论参考。【方法】以野外山杨、水曲柳和东北红豆杉成年植株为研究对象,对比分析3个树种地上器官叶片枝条和地下器官粗根细根N、P含量以及叶与枝、根N、P分配比例,采用标准主轴回归斜率检验3个树种地上、地下器官N与P元素之间及地上与地下器官养分双向运输N、P同一元素的增长关系。【结果】①山杨与水曲柳叶片N、P含量接近,山杨与水曲柳叶片N、P含量分别显著高于、低于东北红豆杉针叶相应数值(P<0.05);东北红豆杉枝条N、P含量最高;3个树种粗根N含量接近,水曲柳粗根P含量及细根N、P含量均最高。②水曲柳叶片与枝条、山杨叶片与粗根N、P含量比均最高,水曲柳叶片与细根N、P含量比最低。③山杨和东北红豆杉地上器官、地下器官N与P含量分别为异速、等速关系,且地下器官N与P元素间的变化斜率仅为地上部分的1/2;而水曲柳地上器官、地下器官两元素之间的变化斜率相似,均为显著大于1的异速增长关系。山杨地上与地下双向P、东北红豆杉上行方向P含量斜率均为相应N含量的一半,东北红豆杉下行方向N、P关系均不显著,水曲柳上行方向N、P含量斜率相似,下行方向P含量斜率是N的2/3左右。【结论】与山杨和东北红豆杉相比,水曲柳倾向于将N和P养分分配到代谢活跃的叶片和细根,且其地上(地下)器官N与P含量、地上与地下N、P含量变化速率具有协调一致性。
中图分类号:
孙慧珍,李杉,刘珊珊,等. 东北地区3个树种不同器官氮磷含量及计量特征[J]. 南京林业大学学报(自然科学版), 2024, 48(5): 147-155.
SUN Huizhen, LI Shan, LIU Shanshan, WANG Xingchang. Nitrogen, phosphorus contents and stoichiometric characteristics in different organs of three tree species in northeast China[J].Journal of Nanjing Forestry University (Natural Science Edition), 2024, 48(5): 147-155.DOI: 10.12302/j.issn.1000-2006.202210003.
表1
3个树种叶性状参数特征"
树种 species | 叶面积/cm2 LA | 叶质量/g M | 比叶面积/(cm2·g-1) SLA | 含水率/% LWC |
---|---|---|---|---|
山杨 Populus davidiana | 16.00±0.76 b | 0.111 3±0.006 2 b | 144.86±3.41 b | 57.03±0.46 b |
水曲柳 Fraxinus mandshurica | 27.58±1.39 a | 0.159 2±0.010 8 a | 180.97±14.87 a | 69.23±1.15 a |
东北红豆杉 Taxus cuspidata | 0.39±0.03 c | 0.006 5±0.000 4 c | 59.76±2.59 c | 66.90±0.69 a |
表2
3个树种0~20 cm土壤C、N、P含量及计量比特征"
土壤深度/cm soil depth | 树种 species | 养分含量/ (mg·g-1) nutrient content | C/N | C/P | N/P | ||
---|---|---|---|---|---|---|---|
C | N | P | |||||
山杨 P. davidiana | 92.72±4.95 b | 7.90±0.46 a | 1.67±0.04 a | 12.30±1.19 b | 55.81±3.19 b | 4.77±0.30 bc | |
0~10 cm | 水曲柳 F. mandshurica | 72.34±7.86 c | 7.97±0.62 a | 1.36±0.08 bc | 9.18±0.84 bc | 53.24±5.35 b | 5.84±0.32 ab |
东北红豆杉 T. cuspidata | 157.47±6.88 a | 9.04±1.08 a | 1.37±0.03 bc | 18.27±1.47 a | 116.68±4.93 a | 6.59±0.74 a | |
山杨 P. davidiana | 47.15±2.94 d | 5.34±0.21 b | 1.44±0.05 b | 8.91±0.59 bc | 32.89±1.86 c | 3.73±0.12 c | |
>10~20 cm | 水曲柳 F. mandshurica | 38.30±3.79 d | 4.86±0.39 b | 1.21±0.09 cd | 7.86±0.39 c | 32.18±2.46 c | 4.07±0.20 c |
东北红豆杉 T. cuspidata | 46.86±4.93 d | 5.57±0.70 b | 1.04±0.10 d | 10.01±2.86 bc | 47.35±7.55 b | 5.44±0.65 b |
图1
3个树种组织器官N和P含量及计量比 L.叶片leaf;Tb.枝条皮twig bark;Tx.枝条木质部twig xylem;T.枝条twig;Crb.粗根皮coarse root bark;Crx.粗根木质部coarse root xylem;Cr.粗根coarse root;Fr.细根fine root。图中数据均为平均值±标准误。下同。不同大写和小写字母分别代表种间同一组织器官差异显著和同种植株组织器官差异显著(P<0.05)。The data in the figure are mean ± standard error. The same below. Different uppercase and lowercase letters mean significant differences between species within same tissues/organs and tissues/organs within same species (P<0.05)."
表3
山杨、水曲柳和东北红豆杉N-P关系及N、P含量的标准化主轴回归分析"
指标 index | 地上-地下部分 above-and below-ground | 树种 species | n | 斜率(95%置信区间) b(95%CI) | R2 | 斜率多重比较 multiple comparison of slope | ||
---|---|---|---|---|---|---|---|---|
山杨 P. davidiana | 水曲柳 F. mandshurica | |||||||
N-P关系 N-P relation | 地上 aboveground | 山杨 P. davidiana | 24 | 2.16**(1.68, 2.77) | 0.67 | |||
水曲柳 F. mandshurica | 24 | 1.83**(1.50, 2.25) | 0.79 | |||||
东北红豆杉 T. cuspidata | 16 | 2.48*(1.55, 3.97) | 0.28 | |||||
地下 belowground | 山杨 P. davidiana | 24 | 1.03**(0.85, 1.24) | 0.81 | ||||
水曲柳 F. mandshurica | 24 | 1.77**(1.31, 2.38) | 0.53 | ** | ||||
东北红豆杉 T. cuspidata | 16 | 1.05**(0.75,1.48) | 0.64 | * | ||||
整体 total | 山杨 P. davidiana | 48 | 1.59** (1.40, 1.81) | 0.81 | ||||
水曲柳 F. mandshurica | 48 | 1.82** (1.53, 2.16) | 0.66 | |||||
东北红豆杉 T. cuspidata | 32 | 1.28**(1.07, 1.53) | 0.77 | ** | ** | |||
N含量 N content | 上行(N↑) upward | 山杨 P. davidiana | 24 | 1.50**(1.33, 1.68) | 0.93 | |||
水曲柳 F. mandshurica | 24 | 1.18**(1.04, 1.34) | 0.92 | ** | ||||
东北红豆杉 T. cuspidata | 16 | 0.86**(0.77, 0.96) | 0.96 | ** | ** | |||
下行(N↓) downward | 山杨 P. davidiana | 24 | 2.09**(1.56, 2.80) | 0.55 | ||||
水曲柳 F. mandshurica | 24 | 0.96**(0.87, 1.06) | 0.95 | ** | ||||
东北红豆杉 T. cuspidata | 16 | 0.75 (0.44, 1.29) | 0.03 | |||||
地上地下 above- and below-ground | 山杨 P. davidiana | 24 | 1.70**(1.41, 2.06) | 0.81 | ||||
水曲柳 F. mandshurica | 24 | 1.08**(0.97, 1.21) | 0.94 | ** | ||||
东北红豆杉 T. cuspidata | 16 | 0.94**(0.68, 1.31) | 0.66 | ** | ||||
P含量 P content | 上行(P↑) upward | 山杨 P. davidiana | 24 | 0.71**(0.57, 0.89) | 0.75 | |||
水曲柳 F. mandshurica | 24 | 1.27**(0.95, 1.71) | 0.55 | ** | ||||
东北红豆杉 T. cuspidata | 16 | 0.44**(0.30, 0.64) | 0.56 | * | ** | |||
下行(P↓) downward | 山杨 P. davidiana | 24 | 1.04**(0.78, 1.38) | 0.57 | ||||
水曲柳 F. mandshurica | 24 | 0.69**(0.58, 0.82) | 0.85 | * | ||||
东北红豆杉 T. cuspidata | 16 | 0.47 (0.27, 0.82) | 0 | |||||
地上地下 above- and below-ground | 山杨 P. davidiana | 24 | 0.81**(0.63, 1.04) | 0.69 | ||||
水曲柳 F. mandshurica | 24 | 1.05**(0.83, 1.32) | 0.71 | |||||
东北红豆杉 T. cuspidata | 16 | 0.40 (0.23, 0.69) | 0.02 |
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