林业科学 ›› 2021, Vol. 57 ›› Issue (8): 24-32.doi: 10.11707/j.1001-7488.20210803
许塔艳1,全文选1,李朝婵1,2,*,潘延楠1,谢利娟3,郝江涛1,高永道1
收稿日期:
2019-09-26
出版日期:
2021-08-25
发布日期:
2021-09-30
通讯作者:
李朝婵
基金资助:
Tayan Xu1,Wenxuan Quan1,Chaochan Li1,2,*,Yannan Pan1,Lijuan Xie3,Jiangtao Hao1,Yongdao Gao1
Received:
2019-09-26
Online:
2021-08-25
Published:
2021-09-30
Contact:
Chaochan Li
摘要:
目的: 探讨贵州百里杜鹃国家森林公园内不同林分土壤中有机酸的分布特征,以期为野生杜鹃林分土壤管理提供技术参考。方法: 采集常绿混交马缨杜鹃林、常绿混交露珠杜鹃林、常绿混交迷人杜鹃林、常绿阔叶混交林、落叶阔叶混交林的表层土壤,通过高效液相色谱技术(HPLC)测定土壤中的草酸、酒石酸、苹果酸、柠檬酸、乙酸、乳酸、丁二酸、甲酸的含量。结果: 不同林分类型土壤有机酸总量分布情况为:落叶阔叶混交林>常绿混交露珠杜鹃林>常绿混交马缨杜鹃林>常绿阔叶混交林>常绿混交迷人杜鹃林;土壤有机酸的分布差异显著,有机酸含量高低顺序依次为:草酸>酒石酸>柠檬酸>苹果酸>乳酸>乙酸>甲酸>丁二酸,草酸为优势酸,乙酸、甲酸和丁二酸含量较低;土壤有机酸与pH呈负相关,其中酒石酸与pH呈极显著负相关,柠檬酸与pH呈显著负相关;聚类结果显示,落叶阔叶混交林明显区别于其他林分类型,且草酸含量最高。结论: 不同林分类型土壤中有机酸分布受到优势种的影响,百里杜鹃的落叶阔叶混交林中土壤有机酸含量远高于常绿阔叶混交林和常绿混交杜鹃林,森林土壤有机酸分布特征应成为森林林分管理关注的对象。
中图分类号:
许塔艳,全文选,李朝婵,潘延楠,谢利娟,郝江涛,高永道. 野生杜鹃林土壤低分子量有机酸分布特征[J]. 林业科学, 2021, 57(8): 24-32.
Tayan Xu,Wenxuan Quan,Chaochan Li,Yannan Pan,Lijuan Xie,Jiangtao Hao,Yongdao Gao. Distribution Characteristics of Low Molecular Weight Organic Acids in Soil of Wild Rhododendron Forest[J]. Scientia Silvae Sinicae, 2021, 57(8): 24-32.
表1
不同林分样地基本情况"
林分样地基本情况 General situation of stand plot | 常绿混交马缨杜鹃林 Evergreen mixed forest of R. delavayi | 常绿混交迷人杜鹃林 Evergreen mixed forest of R. agastum | 常绿混交露珠杜鹃林 Evergreen mixed forest of R.irroratum | 常绿阔叶混交林 Evergreen broad-leaved mixed forest | 落叶阔叶混交林 Deciduous broad-leaved mixed forest |
杜鹃幼苗数量 Number of seedlings | 1 | 0 | 1 | 3 | 23 |
枯落物厚度 Litter thickness/cm | 8 | 10 | 9 | 6 | 2 |
腐殖质厚度 Humus thickness/cm | 4 | 4 | 3 | 2 | 0.8 |
土壤pH Soil pH | 4.11 | 4.83 | 4.72 | 5.32 | 5.63 |
土壤温度 Soil temperature/℃ | 17 | 16 | 15 | 15 | 19 |
坡位Slope position | 中Middle | 上Up | 上Up | 上Up | 中Middle |
坡向Aspect | 西南Southwest | 西南Southwest | 北North | 北North | 南South |
坡度Slope | 11° | 23° | 15° | 15° | 15° |
光照度Illumination/lx | 20 | 30 | 66 | 260 | 171 |
湿度Humidity(%) | 68.4 | 62.5 | 62.2 | 65.3 | 51.2 |
树种株数比(杜鹃∶乔木∶灌木) Number of tree species composition(rhododendron∶tree∶shrub) | 52∶5∶4 | 59∶5∶10 | 55∶7∶8 | 50∶13∶12 | 0∶43∶42 |
杜鹃相对盖度 Rhododendron relative coverage(%) | 85 | 87 | 80 | 52 | 0 |
表2
不同林分类型土壤理化指标的相关关系①"
酒石酸 Tartaric acid | 甲酸 Formic acid | 苹果酸 Malic acid | 乳酸 Lactic acid | 乙酸 Acetic acid | 柠檬酸 Citric acid | 丁二酸 Succinic acid | pH | 相对含水量 Relative water content | |
草酸Oxalic acid | -0.587 | -0.271 | 0.965** | -0.226 | 0.907* | -0.332 | 0.131 | 0.530 | -0.894* |
酒石酸Tartaric acid | 0.662 | -0.670 | 0.498 | -0.811 | 0.955* | 0.486 | -0.984** | 0.555 | |
甲酸Formic acid | -0.245 | 0.870 | -0.559 | 0.691 | -0.017 | -0.542 | 0.378 | ||
苹果酸Malic acid | -0.272 | 0.939* | -0.419 | -0.115 | 0.649 | -0.770 | |||
乳酸Lactic acid | -0.555 | 0.471 | 0.084 | -0.408 | 0.128 | ||||
乙酸Acetic acid | -0.609 | -0.131 | 0.757 | -0.759 | |||||
柠檬酸Citric acid | 0.555 | -0.946* | 0.376 | ||||||
丁二酸Succinic acid | -0.624 | -0.355 | |||||||
pH | -0.456 |
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