陕北黄土丘陵区刺槐人工林土壤生态化学计量特征
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摘要
为阐明陕北黄土丘陵区刺槐人工林土壤生态化学计量学特征,明确不同年限刺槐人工林土壤生态化学计量特征随土层深度的变化规律,采用野外调查与室内分析相结合的方法对研究区内9,17,30 a的刺槐人工林土壤C,N,P,K含量进行了测定,分析土壤化学计量特征及土层间的关系。结果表明:(1)随着刺槐年限的增加,土壤C,N含量增加且二者呈极显著的正相关关系,P含量先增加后减少,在生长年限后期需补充土壤P元素,K含量减少;(2)随土层深度的增加,土壤C,N含量均减少且与土层深度呈显著的负相关关系;P含量在所有土层中分布较均匀;K含量随着土层深度的增加而增加,与土层深度有显著的正相关关系;(3)土壤C∶N,C∶P,C∶K,N∶P,N∶K和P∶K均随年限的增加而增加;在0—100 cm土层内,C∶N在8.52～8.96之间波动,C∶P,C∶K,N∶P和N∶K随土层深度的增加逐渐减少后趋于稳定。研究结果可为黄土丘陵区人工林生态系统养分受限元素判断和平衡调控机制提供依据。
To understand the characteristics of soil ecological stoichiometry and the relationships between soil depth and soil ecological stoichiometry in Robinia pseudoacacia plantation with 9 year, 17 year, 30 year age, respectively, in the loess hilly region, the field investigations and laboratory analyses were carried out to study the soil ecological stoichiometry characteristics and its relationship with soil depth. The results showed that:(1) with the growth of Robinia pseudoacacia plantation, the contents of the carbon(C), nitrogen(N) increased and a significant positive correlation between them existed; and the contents of the phosphorus(P) increased first and then decreased, and the soil P elements should be supplemented in the later growth years; The content of potassium(K) decreased with the growth of Robinia pseudoacacia plantation;(2) the contents of soil C and N decreased with the increase of soil depth and had a significant negative correlation with soil depth; P content evenly distributed throughout the soil, with little change in soil profile; K content increased with the increase of soil depth, and had a significant positive correlation with soil depth;(3) the soil C∶N, C∶P, C∶K, N∶P, N∶K, and P∶K all showed the increasing trend with the increase of years; in the 0—100 cm soil layer, the soil C∶N had a narrow range of 8.52 to 8.96; C∶P, C∶K, N∶P and N∶K gradually decreased and then tended to be stable with the increase of soil depth. These results can provide the basis for the judgment of nutrient limiting elements and the balance regulation mechanism of plantation ecosystem in the loess hilly region.
To understand the characteristics of soil ecological stoichiometry and the relationships between soil depth and soil ecological stoichiometry in Robinia pseudoacacia plantation with 9 year, 17 year, 30 year age, respectively, in the loess hilly region, the field investigations and laboratory analyses were carried out to study the soil ecological stoichiometry characteristics and its relationship with soil depth. The results showed that:(1) with the growth of Robinia pseudoacacia plantation, the contents of the carbon(C), nitrogen(N) increased and a significant positive correlation between them existed; and the contents of the phosphorus(P) increased first and then decreased, and the soil P elements should be supplemented in the later growth years; The content of potassium(K) decreased with the growth of Robinia pseudoacacia plantation;(2) the contents of soil C and N decreased with the increase of soil depth and had a significant negative correlation with soil depth; P content evenly distributed throughout the soil, with little change in soil profile; K content increased with the increase of soil depth, and had a significant positive correlation with soil depth;(3) the soil C∶N, C∶P, C∶K, N∶P, N∶K, and P∶K all showed the increasing trend with the increase of years; in the 0—100 cm soil layer, the soil C∶N had a narrow range of 8.52 to 8.96; C∶P, C∶K, N∶P and N∶K gradually decreased and then tended to be stable with the increase of soil depth. These results can provide the basis for the judgment of nutrient limiting elements and the balance regulation mechanism of plantation ecosystem in the loess hilly region.
引文
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[21] 刘冰燕,陈云明,曹扬.渭北黄土区刺槐人工林氮、磷生态化学计量特征[J].西北林学院学报,2016,31(1):1-6.
[22] 杨佳佳,张向茹,马露莎,等.黄土高原刺槐林不同组分生态化学计量关系研究[J].土壤学报,2014,51(1):133-142.
[23] Zhang C,Tian H,Liu J,et al.Pools and distributions of soil phosphorus in China[J].Global Biogeochemical Cycles,2005,19,GB1020,doi:10,1029/2004 GB002296.
[24] 占丽平,李小坤,鲁剑巍,等.土壤钾素运移的影响因素研究进展[J].土壤,2012,44(4):548-553.
[25] 王绍强,于贵瑞.生态系统碳氮磷元素的生态化学计量学特征[J].生态学报,2008,28(8):3937-3947.
[26] 黄昌勇.土壤学[M].北京:中国农业出版社,2000.
[27] 彭佩钦,张文菊,童成立,等.洞庭湖湿地土壤碳、氮、磷及其与土壤物理性状的关系[J].应用生态学报,2005,16(10):1872-1878.
[28] 敖伊敏.不同围封年限下典型草原土壤生态化学计量特征研究[D].呼和浩特:内蒙古师范大学,2012.
[2] 曾德慧,陈广生.生态化学计量学:复杂生命系统奥秘的探索[J].植物生态学报,2005,29(6):1007-1019.
[3] 阎恩荣,王希华,郭明,等.天童常绿阔叶林演替系列植物群落的N∶P化学计量特征[J].植物生态学报,2008,32(1):13-22.
[4] Han W,Fang J,Guo D,et al.Leaf Nitrogen and Phosphorus Stoichiometry across 753 Terrestrial Plant Species in China[J].New Phytologist,2005,168(2):377-385.
[5] 韩文轩,吴漪,汤璐瑛,等.北京及周边地区植物叶的碳氮磷元素计量特征[J].北京大学学报:自然科学版,2009,45(5):855-860.
[6] 刘兴诏,周国逸,张德强,等.南亚热带森林不同演替阶段植物与土壤中N,P的化学计量特征[J].植物生态学报,2010,34(1):64-71.
[7] Yuan Z Y,Chen H Y.A global analysis of fine root production as affected by soil nitrogen and phosphorus[J].Proceedings Biological Sciences,2012,279(1743):3796-3802.
[8] 崔高阳,曹扬,陈云明.陕西省森林各生态系统组分氮磷化学计量特征[J].植物生态学报,2015,39(12):1146-1155.
[9] 淑敏,姜涛,王东丽,等.科尔沁沙地不同林龄樟子松人工林土壤生态化学计量特征[J].干旱区研究,2018,35(4):789-795.
[10] 曹娟,闫文德,项文化,等.湖南会同3个林龄杉木人工林土壤碳、氮、磷化学计量特征[J].林业科学,2015,51(7):1-8.
[11] 陈印平,夏江宝,赵西梅,等.黄河三角洲典型人工林土壤碳氮磷化学计量特征[J].土壤通报,2017,48(2):392-398.
[12] 任璐璐,张炳学,韩凤朋,等.黄土高原不同年限刺槐土壤化学计量特征分析[J].水土保持学报,2017,31(2):339-344.
[13] 刘珮,马慧,智颖飙,等.9种典型荒漠植物生态化学计量学特征分析[J].干旱区研究,2018,35(1):207-216.
[14] 高世铭,杨封科,苏永生.陇中黄土丘陵沟壑区生态环境建设与农业可持续发展研究[M].郑州:黄河水利出版社,2003.
[15] 樊敏,马履一,王瑞辉.刺槐春夏季树干液流变化规律[J].林业科学,2008,44(1):41-45.
[16] 马露莎,陈亚南,张向茹,等.黄土高原刺槐叶片生态化学计量学特征[J].水土保持研究,2014,21(3):57-61.
[17] 陈亚南,马露莎,张向茹,等.陕西黄土高原刺槐枯落叶生态化学计量学特征[J].生态学报,2014,34(15):4412-4422.
[18] 张向茹,马露莎,陈亚南,等.黄土高原不同纬度下刺槐林土壤生态化学计量学特征研究[J].土壤学报,2013,50(4):818-825.
[19] 刘光崧.土壤理化分析与剖面描述[M].北京:中国标准出版社,1996.
[20] 贺亮,苏印泉,季志平,等.黄土高原沟壑区刺槐、油松人工林的碳储量及其分布特征研究[J].西北林学院学报,2007,22(4):49-53.
[21] 刘冰燕,陈云明,曹扬.渭北黄土区刺槐人工林氮、磷生态化学计量特征[J].西北林学院学报,2016,31(1):1-6.
[22] 杨佳佳,张向茹,马露莎,等.黄土高原刺槐林不同组分生态化学计量关系研究[J].土壤学报,2014,51(1):133-142.
[23] Zhang C,Tian H,Liu J,et al.Pools and distributions of soil phosphorus in China[J].Global Biogeochemical Cycles,2005,19,GB1020,doi:10,1029/2004 GB002296.
[24] 占丽平,李小坤,鲁剑巍,等.土壤钾素运移的影响因素研究进展[J].土壤,2012,44(4):548-553.
[25] 王绍强,于贵瑞.生态系统碳氮磷元素的生态化学计量学特征[J].生态学报,2008,28(8):3937-3947.
[26] 黄昌勇.土壤学[M].北京:中国农业出版社,2000.
[27] 彭佩钦,张文菊,童成立,等.洞庭湖湿地土壤碳、氮、磷及其与土壤物理性状的关系[J].应用生态学报,2005,16(10):1872-1878.
[28] 敖伊敏.不同围封年限下典型草原土壤生态化学计量特征研究[D].呼和浩特:内蒙古师范大学,2012.
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