植物研究 ›› 2024, Vol. 44 ›› Issue (4): 590-601.doi: 10.7525/j.issn.1673-5102.2024.04.011
• 生理与生态 • 上一篇
李艺雪1, 叶冬梅1, 郝龙飞1(), 刘婷岩2, 段嘉靖3, 聂正英4
收稿日期:
2023-10-28
出版日期:
2024-07-20
发布日期:
2024-07-09
通讯作者:
郝龙飞
E-mail:haolongfei_00@126.com
作者简介:
李艺雪(2000—),女,硕士研究生,主要从事林木菌根技术研究。
基金资助:
Yixue LI1, Dongmei YE1, Longfei HAO1(), Tingyan LIU2, Jiajing DUAN3, Zhengying NIE4
Received:
2023-10-28
Online:
2024-07-20
Published:
2024-07-09
Contact:
Longfei HAO
E-mail:haolongfei_00@126.com
摘要:
基于土壤微生物可增强植物对全球变化的适应性,研究氮沉降背景下土壤微生物对根际土壤微生境生态化学计量特征的影响,进而探明生态化学计量特征变化对根际土壤微生物养分限制的调控规律。在土壤灭菌处理(灭菌土(+S)和非灭菌土(-S))基础上,对1年生柠条(Caragana korshinskii)盆栽苗木进行2种苗木接种AM真菌处理((接菌(+M)和未接菌(-M)),并设置氮添加处理(不施氮(CK)、低氮(LN,3 g·m-2·a-1)、高氮(HN, 6 g·m-2·a-1))。以非灭菌土未接菌条件下土壤原有微生物群落组成为基础,探究不同处理下微生境生态化学计量特征与微生物养分限制的关联性。结果如下:(1)灭菌土处理中,柠条菌根苗根际土壤中真菌相对丰度较非菌根苗在CK、LN和HN处理下分别显著提高了82.20%、25.00%和59.84%。(2)非灭菌土处理中,LN处理的柠条非菌根苗根际土壤微生物生物量碳磷比较CK处理降低了46.28%(P<0.05),而柠条菌根苗微生物生物量碳磷比较CK增加了56.76%(P<0.05)。(3)各氮添加处理下,灭菌土处理的柠条非菌根苗根际土壤与碳、氮相关土壤酶活性计量比,与碳、磷相关土壤酶活性计量比和向量长度均显著低于菌根苗(P<0.05)。(4)PLS-PM路径分析发现,微生物调控对微生物养分限制的总效应系数大于氮添加处理。综上,土壤原生菌和菌根真菌协同调节根际土壤酶化学计量比,进而增强土壤微生物养分限制对氮添加的适应。
中图分类号:
李艺雪, 叶冬梅, 郝龙飞, 刘婷岩, 段嘉靖, 聂正英. 土壤灭菌、AM真菌接种与氮添加对柠条根际土壤的影响[J]. 植物研究, 2024, 44(4): 590-601.
Yixue LI, Dongmei YE, Longfei HAO, Tingyan LIU, Jiajing DUAN, Zhengying NIE. The Responses of Rhizosphere Soil of Caragana korshinskii under Soil Sterilization, AM Fungi Inoculation and N Addition[J]. Bulletin of Botanical Research, 2024, 44(4): 590-601.
表2
土壤灭菌、苗木接菌和氮添加处理对柠条苗木根际土壤微生物生物量及化学计量特征的影响
处理 Treatments | MBC/(mg·kg-1) | MBN/(mg·kg-1) | MBP/(mg·kg-1) | MBC∶MBN | MBC∶MBP | MBN∶MBP | ||
---|---|---|---|---|---|---|---|---|
+S | -M | CK | 95.12±12.78cd | 1.81±0.02f | 2.28±0.41bcd | 52.50±7.26a | 42.69±2.84bc | 0.86±0.18ef |
LN | 73.29±8.28d | 3.87±0.84def | 1.89±0.49cd | 19.81±2.16cde | 41.79±5.81bc | 2.09±0.09de | ||
HN | 70.85±14.74d | 2.63±0.53def | 2.95±0.40bcd | 26.91±0.51c | 23.66±1.99d | 0.88±0.07ef | ||
+M | CK | 85.03±14.15d | 2.19±0.25ef | 3.34±0.32b | 38.72±3.19b | 25.24±2.10d | 0.65±0.02f | |
LN | 90.60±8.69cd | 5.27±0.80cdef | 3.13±0.46bcd | 17.55±1.54cdef | 29.59±3.23cd | 1.68±0.05def | ||
HN | 166.17±3.16a | 7.24±1.29cd | 3.46±0.24b | 24.48±4.36cd | 48.33±2.35b | 2.07±0.28de | ||
-S | -M | CK | 142.28±24.25a | 14.17±3.66b | 1.75±0.25d | 10.85±1.94efg | 81.77±7.45a | 7.83±1.02a |
LN | 136.70±6.34ab | 19.25±0.69a | 3.15±0.28bc | 7.10±0.16g | 43.92±3.33b | 6.18±0.39b | ||
HN | 157.94±10.83a | 17.28±1.23ab | 3.04±0.61bcd | 9.16±0.35fg | 55.13±8.12b | 6.01±0.78b | ||
+M | CK | 100.79±3.79bcd | 16.73±1.09ab | 3.49±0.26b | 6.05±0.23g | 29.05±1.29cd | 4.80±0.04c | |
LN | 127.76±9.01abc | 6.77±1.47cde | 2.93±0.57bcd | 20.31±3.54cde | 45.54±4.85b | 2.31±0.24d | ||
HN | 129.19±14.33abc | 8.89±1.62c | 5.03±0.50a | 14.90±1.21defg | 25.62±0.40d | 1.75±0.17def | ||
灭菌处理Sterilization treatment(S) | *** | *** | NS | *** | *** | *** | ||
接菌处理Inoculation treatment(M) | NS | * | *** | NS | *** | *** | ||
氮添加处理Nitrogen addition(N) | * | NS | ** | *** | NS | * | ||
灭菌处理×接菌处理(S×M) | *** | *** | NS | ** | *** | *** | ||
灭菌处理×氮添加处理(S×N) | NS | * | NS | *** | * | *** | ||
接菌处理×氮添加处理(M×N) | ** | ** | NS | ** | *** | NS | ||
灭菌处理×接菌处理×氮添加处理(S×M×N) | * | ** | NS | NS | *** | NS |
表3
土壤灭菌、苗木接菌和氮添加处理对柠条苗木根际土壤酶活性及化学计量特征的影响
处理Treatments | EC/(nmol·g-1·h-1) | EN/(nmol·g-1·h-1) | EP/(nmol·g-1·h-1) | EC∶EN | EC∶EP | EN∶EP | VL | VA/(°) | EC∶EN∶EP | ||
---|---|---|---|---|---|---|---|---|---|---|---|
+S | -M | CK | 2.41±0.29f | 5.90±0.59g | 7.49±0.14e | 0.48±0.04d | 0.43±0.06d | 0.88±0.04f | 0.65±0.07d | 48.84±1.48a | 1∶2∶2 |
LN | 2.58±0.23f | 19.16±2.64f | 8.36±0.48e | 0.32±0.02e | 0.44±0.04d | 1.38±0.03abc | 0.55±0.04d | 35.90±0.51def | 1∶3∶2 | ||
HN | 2.53±0.09f | 15.51±0.80f | 8.23±0.99e | 0.34±0.01e | 0.44±0.01d | 1.31±0.06cd | 0.55±0.01d | 37.33±0.22cd | 1∶2∶2 | ||
+M | CK | 6.75±0.87e | 15.28±1.80f | 8.25±0.39e | 0.70±0.02b | 0.89±0.04bc | 1.29±0.03cd | 1.13±0.04bc | 37.90±0.41cd | 1∶1∶1 | |
LN | 6.66±0.20e | 12.95±0.70fg | 9.64±0.59e | 0.74±0.01b | 0.84±0.01c | 1.13±0.01e | 1.12±0.02bc | 41.48±0.18b | 1∶1∶1 | ||
HN | 7.31±0.82e | 14.43±2.18f | 8.80±1.40e | 0.75±0.01b | 0.92±0.06bc | 1.23±0.06d | 1.19±0.05bc | 39.12±1.42c | 1∶1∶1 | ||
-S | -M | CK | 19.79±0.14a | 40.63±2.13e | 17.96±0.37d | 0.81±0.01a | 1.03±0.01a | 1.28±0.01cd | 1.31±0.01a | 37.96±0.22cd | 1∶1∶1 |
LN | 19.22±1.60ab | 54.92±0.99d | 23.15±2.24b | 0.74±0.02b | 0.94±0.01ab | 1.28±0.03cd | 1.19±0.02b | 38.00±0.53cd | 1∶1∶1 | ||
HN | 14.57±0.36d | 66.62±6.35c | 19.04±0.99cd | 0.64±0.01c | 0.91±0.01bc | 1.42±0.02ab | 1.11±0.01bc | 35.09±0.12ef | 1∶1∶1 | ||
+M | CK | 16.48±0.69cd | 77.26±3.91b | 19.40±1.46cd | 0.64±0.00c | 0.95±0.01ab | 1.47±0.02a | 1.15±0.01bc | 34.25±0.22f | 1∶1∶1 | |
LN | 16.38±0.19cd | 81.62±2.30ab | 22.03±0.15bc | 0.63±0.00c | 0.90±0.00bc | 1.42±0.01ab | 1.10±0.00bc | 35.09±0.01ef | 1∶1∶1 | ||
HN | 17.50±0.77bc | 88.12±2.64a | 27.50±1.67a | 0.64±0.01c | 0.86±0.00bc | 1.35±0.01bc | 1.08±0.01c | 36.47±0.15de | 1∶1∶1 | ||
灭菌处理Sterilization treatment(S) | *** | *** | *** | *** | *** | *** | *** | *** | |||
接菌处理Inoculation treatment(M) | *** | *** | ** | *** | *** | ** | *** | *** | |||
氮添加处理Nitrogen addition(N) | NS | *** | ** | *** | NS | *** | ** | *** | |||
灭菌处理×接菌处理(S×M) | *** | *** | NS | *** | *** | NS | *** | NS | |||
灭菌处理×氮添加处理(S×N) | * | ** | NS | NS | * | *** | NS | *** | |||
接菌处理×氮添加处理(M×N) | ** | ** | * | *** | NS | *** | NS | *** | |||
灭菌处理×接菌处理×氮添加处理 (S×M×N) | * | NS | ** | * | NS | *** | NS | *** |
表4
土壤灭菌、苗木接菌和氮添加处理对柠条苗木根际土壤有效养分及化学计量特征的影响
处理Treatments | DOC/(mg·kg-1) | AN/(mg·kg-1) | AP/(mg·kg-1) | DOC∶AN | DOC∶AP | AN∶AP | ||
---|---|---|---|---|---|---|---|---|
+S | -M | CK | 3.78±0.07bc | 5.95±0.33de | 2.89±0.11bcd | 0.64±0.02ef | 1.31±0.02cde | 2.05±0.03bc |
LN | 3.63±0.22cd | 7.38±0.28ab | 3.05±0.13bc | 0.49±0.02f | 1.19±0.04de | 2.42±0.01b | ||
HN | 3.64±0.11cd | 8.04±1.01a | 2.53±0.07def | 0.46±0.04f | 1.44±0.01abc | 3.16±0.32a | ||
+M | CK | 3.29±0.19cd | 2.44±0.05e | 2.09±0.06f | 1.35±0.05bc | 1.57±0.04ab | 1.17±0.01ef | |
LN | 2.86±0.22d | 3.75±0.54de | 2.09±0.08f | 0.78±0.09ef | 1.37±0.06bcd | 1.79±0.21cd | ||
HN | 3.11±0.10cd | 3.69±0.04de | 2.23±0.17ef | 0.84±0.02de | 1.41±0.06bc | 1.67±0.10cd | ||
-S | -M | CK | 3.95±0.60bc | 3.74±0.59de | 2.65±0.19cde | 1.23±0.06c | 1.47±0.12abc | 1.22±0.16ef |
LN | 3.23±0.07cd | 3.65±0.87de | 2.52±0.23def | 1.13±0.01cd | 1.30±0.08cde | 1.15±0.06ef | ||
HN | 3.53±0.11cd | 4.55±0.93cd | 3.07±0.13bc | 0.64±0.00ef | 1.15±0.03e | 1.79±0.03cd | ||
+M | CK | 5.05±0.11a | 3.36±0.14de | 3.23±0.14b | 1.61±0.05b | 1.57±0.03ab | 0.98±0.03fg | |
LN | 5.08±0.52a | 3.09±0.69de | 3.67±0.18a | 2.02±0.26a | 1.37±0.07bcd | 0.70±0.09g | ||
HN | 4.57±0.05ab | 4.48±0.66cd | 2.83±0.21bcd | 1.11±0.21cd | 1.63±0.11a | 1.54±0.16de | ||
灭菌处理Sterilization treatment(S) | *** | *** | *** | *** | NS | *** | ||
接菌处理Inoculation treatment(M) | * | *** | NS | *** | *** | *** | ||
氮添加处理Nitrogen addition(N) | NS | * | NS | *** | ** | *** | ||
灭菌处理×接菌处理(S×M) | *** | *** | *** | NS | NS | *** | ||
灭菌处理×氮添加处理(S×N) | NS | NS | NS | *** | NS | ** | ||
接菌处理×氮添加处理(M×N) | NS | NS | NS | NS | NS | NS | ||
灭菌处理×接菌处理×氮添加处理(S×M×N) | NS | NS | *** | * | ** | * |
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