南京林业大学学报(自然科学版) ›› 2021, Vol. 45 ›› Issue (4): 67-75.doi: 10.12302/j.issn.1000-2006.202104011
刘俊涛1(), 仲静1, 刘济铭1, 罗水晶2, 王冕之1, 范嘉霖1, 贾黎明1,*()
收稿日期:
2021-04-08
接受日期:
2021-06-03
出版日期:
2021-07-30
发布日期:
2021-07-30
通讯作者:
贾黎明
基金资助:
LIU Juntao1(), ZHONG Jing1, LIU Jiming1, LUO Shuijing2, WANG Mianzhi1, FAN Jialin1, JIA Liming1,*()
Received:
2021-04-08
Accepted:
2021-06-03
Online:
2021-07-30
Published:
2021-07-30
Contact:
JIA Liming
摘要:
【目的】了解无患子无性系人工林初果期C、N、P化学计量差异及其养分元素间相互作用。【方法】以福建省建宁县无患子无性系媛华人工林为研究对象,选择其初果期具有代表性的地段,分别设置3块20 m×10 m样地,测定了土壤(有机碳、全氮、全磷、全钾、有效磷、有效钾、碱解氮)和叶片(碳、氮、磷、钾)养分含量,并计算土壤和叶片的碳、氮、磷元素计量比(记为C/N、C/P、N/P),分析处于初果期的无患子人工林土壤和叶片养分含量及化学计量特征。【结果】无患子无性系媛华人工林土壤有机碳、全氮、全钾、有效磷含量在初果期随林龄增大而增加,土壤全磷变化不明显且含量较低(0.36 g/kg);土壤C/N随林龄增加逐步减小,而C/P和N/P有一定增加趋势;叶片碳和磷含量随林龄增加而逐渐增大,氮含量逐渐降低,钾含量无显著变化,其人工林叶片C/N有一定程度升高,C/P和N/P随林龄增加出现逐渐降低的趋势。此外,无患子人工林土壤有机碳和全氮含量具有显著正相关;无患子叶片碳与氮之间呈负相关,但碳与磷、钾呈正相关。同时,无患子无性系人工林叶片C含量与土壤有机碳含量在0~20和≥40~60 cm的土层呈显著正相关,在≥20~40 cm的土层中呈极显著正相关;叶片磷P含量与土壤有机碳含量在0~20 cm呈极显著正相关,在≥20~40和≥40~60 cm的土层中呈显著正相关;N/P与土壤有机碳含量在0~20 和≥40~60 cm呈极显著负相关,在≥20~40 cm土层中呈显著负相关。【结论】在无患子人工林初果期,土壤养分主要受P的限制,因此,苗木定植后的结果初期,可适当增加磷肥的投入。
中图分类号:
刘俊涛,仲静,刘济铭,等. 无患子初果期人工林土壤和叶片C、N、P化学计量特征[J]. 南京林业大学学报(自然科学版), 2021, 45(4): 67-75.
LIU Juntao, ZHONG Jing, LIU Jiming, LUO Shuijing, WANG Mianzhi, FAN Jialin, JIA Liming. Stoichiometric characteristics of soil and leaves in Sapindus mukorossi plantation at an early fruiting stage[J].Journal of Nanjing Forestry University (Natural Science Edition), 2021, 45(4): 67-75.DOI: 10.12302/j.issn.1000-2006.202104011.
表2
无患子初果期不同林龄人工林叶片养分含量及化学计量比"
树龄/a age | c(C)/ (g·kg-1) | c(N)/ (g·kg-1) | c(P)/ (g·kg-1) | c(K)/ (g·kg-1) | C/N | C/P | N/P |
---|---|---|---|---|---|---|---|
5 | 493.61±7.59 b | 21.23±0.95 a | 0.95±0.06 b | 18.45±2.83 a | 23.29±1.37 a | 514.49±39.98 a | 22.36±0.75 a |
6 | 507.49±7.27 a | 20.56±0.93 a | 1.06±0.07 b | 17.65±5.22 a | 24.71±1.38 a | 478.61±29.03 ab | 19.44±2.15 ab |
7 | 512.00±2.60 a | 19.40±1.55 a | 1.19±0.05 a | 18.70±0.49 a | 26.53±2.06 a | 430.15±19.49 b | 16.28±1.57 b |
均值mean | 504.63 | 20.40 | 1.06 | 18.27 | 24.85 | 474.42 | 19.35 |
表3
无患子初果期人工林土壤养分含量及化学计量比的相关性"
土壤养分 soil nutrient | SOC | TN | TP | TK | AK | AP | AHN | C/N | C/P | N/P |
---|---|---|---|---|---|---|---|---|---|---|
SOC | 1 | |||||||||
TN | 0.891** | 1 | ||||||||
TP | 0.447* | 0.182 | 1 | |||||||
TK | 0.250 | 0.521** | -0.243 | 1 | ||||||
AK | 0.604** | 0.306 | 0.636** | -0.256 | 1 | |||||
AP | 0.913** | 0.871** | 0.344 | 0.151 | 0.485* | 1 | ||||
AHN | 0.890** | 0.736** | 0.475* | 0.140 | 0.632** | 0.826** | 1 | |||
C/N | -0.123 | -0.540** | 0.317 | -0.659** | 0.370 | -0.261 | -0.005 | 1 | ||
C/P | 0.957** | 0.912** | 0.222 | 0.374 | 0.454* | 0.881** | 0.811** | -0.207 | 1 | |
N/P | 0.772** | 0.963** | -0.080 | 0.618** | 0.124 | 0.768** | 0.612** | -0.648** | 0.852** | 1 |
表5
初果期无患子人工林叶片和土壤养分含量及计量比相关性"
土层/cm layer | 土壤养分 soil nutrient | 叶片养分leaf nutrient | |||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
C | N | P | K | C/N | C/P | N/P | |||||||||||||||||||
0~20 | SOC | 0.783* | -0.704* | 0.853** | -0.126 | 0.763* | -0.775* | -0.899** | |||||||||||||||||
TN | 0.788* | -0.669* | 0.881** | -0.037 | 0.739* | -0.825** | -0.905** | ||||||||||||||||||
TP | -0.359 | 0.101 | -0.757* | -0.257 | -0.192 | 0.774* | 0.585 | ||||||||||||||||||
TK | 0.619 | -0.793* | 0.527 | 0.015 | 0.810** | -0.443 | -0.673* | ||||||||||||||||||
AK | -0.154 | 0.296 | -0.375 | -0.204 | -0.312 | 0.356 | 0.355 | ||||||||||||||||||
AP | 0.707* | -0.379 | 0.840** | 0.008 | 0.483 | -0.813** | -0.785* | ||||||||||||||||||
AHN | 0.667* | -0.106 | 0.339 | 0.033 | 0.210 | -0.175 | -0.298 | ||||||||||||||||||
C/N | -0.672* | 0.496 | -0.760* | -0.124 | -0.570 | 0.756* | 0.753* | ||||||||||||||||||
C/P | 0.755* | -0.612 | 0.934** | -0.019 | 0.687* | -0.871** | -0.916** | ||||||||||||||||||
N/P | 0.763* | -0.601 | 0.911** | 0.020 | 0.681* | -0.860** | -0.897** | ||||||||||||||||||
土层/cm layer | 土壤养分 soil nutrient | 叶片养分leaf nutrient | |||||||||||||||||||||||
C | N | P | K | C/N | C/P | N/P | |||||||||||||||||||
≥20~40 | SOC | 0.827** | -0.563 | 0.784* | 0.149 | 0.656 | -0.683* | -0.790* | |||||||||||||||||
TN | 0.793* | -0.628 | 0.888** | -0.020 | 0.706* | -0.817** | -0.888** | ||||||||||||||||||
TP | -0.105 | 0.325 | 0.001 | 0.149 | -0.286 | -0.109 | 0.067 | ||||||||||||||||||
TK | 0.781* | -0.571 | 0.948** | -0.057 | 0.669* | -0.872** | -0.924** | ||||||||||||||||||
AK | -0.409 | 0.420 | -0.783* | -0.177 | -0.475 | 0.812** | 0.724* | ||||||||||||||||||
AP | 0.810** | -0.491 | 0.643 | 0.013 | 0.596 | -0.528 | -0.661 | ||||||||||||||||||
AHN | 0.587 | -0.724* | 0.720* | -0.393 | 0.752* | -0.611 | -0.804** | ||||||||||||||||||
C/N | -0.725* | 0.610 | -0.811** | 0.148 | -0.671* | 0.763* | 0.830** | ||||||||||||||||||
C/P | 0.722* | -0.598 | 0.673* | 0.054 | 0.659 | -0.548 | -0.698* | ||||||||||||||||||
N/P | 0.747* | -0.643 | 0.851** | -0.030 | 0.708* | -0.769* | -0.855** | ||||||||||||||||||
≥40~60 | SOC | 0.793* | -0.722* | 0.734* | 0.096 | 0.811** | -0.639 | -0.832** | |||||||||||||||||
TN | 0.702* | -0.359 | 0.742* | 0.267 | 0.458 | -0.642 | -0.660 | ||||||||||||||||||
TP | 0.084 | -0.135 | -0.251 | -0.007 | 0.099 | 0.290 | 0.121 | ||||||||||||||||||
TK | 0.839** | -0.531 | 0.872** | 0.001 | 0.640 | -0.784* | -0.856** | ||||||||||||||||||
AK | 0.050 | 0.214 | -0.325 | -0.168 | -0.192 | 0.356 | 0.275 | ||||||||||||||||||
AP | 0.131 | -0.365 | 0.077 | 0.162 | 0.376 | -0.024 | -0.190 | ||||||||||||||||||
AHN | 0.208 | -0.479 | 0.344 | -0.447 | 0.472 | -0.314 | -0.427 | ||||||||||||||||||
C/N | -0.454 | 0.027 | -0.414 | -0.329 | -0.107 | 0.335 | 0.283 | ||||||||||||||||||
C/P | 0.730* | -0.706* | 0.857** | -0.051 | 0.783* | -0.804** | -0.923** | ||||||||||||||||||
N/P | 0.558 | -0.249 | 0.663 | 0.241 | 0.342 | -0.585 | -0.559 |
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