辽宁章古台地区不同年龄樟子松固沙林对土壤pH值的影响

生态学杂志

辽宁章古台地区不同年龄樟子松固沙林对土壤pH值的影响

雷泽勇^1*,白津宁¹,周凤艳²,于东伟¹,李尧¹

（¹辽宁工程技术大学环境科学与工程学院，辽宁阜新 123000; ²辽宁省沙地治理与利用研究所，辽宁阜新 123000）

出版日期:2019-11-10 发布日期:2019-11-10

Effects of Pinus sylvestris var.mongolicasand fixation plantations with different ages on soil pH in Zhanggutai, Liaoning Province.

LEI Ze-yong^1*, BAI Jin-ning¹, ZHOU Feng-yan², YU Dong-wei¹, LI Yao¹

(¹College of Environmental Science and Engineering, Liaoning Technical University, Fuxin 123000, Liaoning, China; ²Liaoning Institute of Sandy Land Control and Utilization, Fuxin 123000, Liaoning, China).

Online:2019-11-10 Published:2019-11-10

摘要/Abstract

摘要： 营造樟子松人工林是沙地治理的一项重要措施，而造林后林分的生长一般会引起土壤pH值的变化，但营造樟子松固沙林后引起的土壤pH变化却并没有引起关注。以辽宁省章古台不同林龄樟子松固沙林（幼龄林、中龄林、成熟林和过熟林）为对象，研究了营造樟子松林后不同发育阶段0～100 cm土层土壤pH值的变化及其影响因子。结果表明：（1）沙地营造樟子松人工林后，pH值的变化范围由对照草地的两个层次（0～10或0～20、20～100 cm）扩大为3个层次（0～10或0～20、20～40、40～100 cm）。（2）随人工林林龄的增加，0～20 cm层pH值显著降低，20～40 cm层保持不变，40～100 cm层幼龄林、成熟林显著高于过熟林，而过熟林与草地无显著差异。（3）樟子松人工林中，0～10 cm层，pH值与土壤全钾（TK）呈显著正相关，与土壤有效磷（AP）呈显著负相关，10～20 cm层，与土壤有效钾（AK）和土壤有机碳（SOC）呈显著负相关，而与土壤含水率（SW）呈显著正相关，20～40、40～60、60～80 cm层，分别与土壤碱解氮（AN）、土壤全氮（TN）、土壤全磷（TP）呈显著正相关。樟子松林处于幼龄林时，pH值在20～40和60～80 cm层分别与C/P和AN、土壤容重（BD）呈显著正相关，而在80～100 cm层与N/P呈负相关；中龄林时，pH值在10～20 cm层与C/P呈显著负相关，20～40和40～60 cm层分别与粒径<0.05 mm的黏粉粒含量（FS）和TN呈显著正相关；成熟林时，pH值在0～10 cm层与BD、AP呈极显著正相关，与SW、AK、FS呈显著正相关，20～40 cm层与TN呈正相关，在60～100 cm层与C/N呈负相关；过熟林时，pH值在0～10 cm层与AN呈显著正相关，与TK呈显著负相关，10～20 cm层与TN呈显著正相关。

关键词: 川陕哲罗鲑, 方案优化, 环境DNA分析

Abstract: Establishment of Pinus sylvestris var.mongolica plantations is an important strategy to control desertification. Afforestation generally changes soil pH. However, changes in soil pH caused by the establishment of P. sylvestris var. mongolica sandfixing forests are not well documented. In this study, we measured soil pH (0-100 cm soil layer) in P. sylvestris var. mongolica forests at different developmental stages (young, middleaged, mature, and overmature) in Zhanggutai of Liaoning Province. The results showed that the range of pH values shifted from two levels (0-10 or 0-20, 20-100 cm) to three levels (0-10 or 0-20, 20-40, 40-100 cm). With the increases of stand age, soil pH decreased significantly in 0-20 cm layer, and kept unchanged in 20-40 cm layer. Soil pH in 40-100 cm layer of young and mature forests were significantly higher than that of over-mature forests, while there was no significant difference between over-mature forests and grasslands. Soil pH was significantly positively related to total K content and negatively related to available P content in 0-10 cm soil layer. There was a significant negative correlation between soil pH and available K and soil organic C contents, a positive correlation with soil water content in 10-20 cm layer, and positive correlations with available N, total N and total P contents in 20-40, 40-60, 60-80 cm soil layers. In young forests, soil pH was positively correlated with C/P ratio, available N, bulk density in 20-40 and 60-80 cm layers, respectively, and negatively correlated with N/P ratio in 80-100 cm layer. In middleaged forests, soil pH was negatively correlated with C/P ratio in 10-20 cm layer, and positively correlated with FS (the sum percentage of clay (<0.002 mm) and silt (0.002-0.05 mm)) and total N content in 20-40 cm and 40-60 cm layers, respectively. In mature forests, soil pH of 0-10 cm layer was significantly positively correlated with soil bulk density and available P, and positively related to soil moisture, available K and FS. Soil pH was positively correlated with total N in 20-40 cm layer and negatively correlated with C/N ratio in 60-100 cm layer. In over-mature forests, soil pH was positively correlated with available N in 0-10 cm layer, while negatively correlated with total K. There was a positive correlation between soil pH and total N in 10-20 cm layer.

Key words: eDNA analysis, protocol optimization., Hucho bleekeri

雷泽勇,白津宁,周凤艳,于东伟,李尧. 辽宁章古台地区不同年龄樟子松固沙林对土壤pH值的影响[J]. 生态学杂志.

LEI Ze-yong, BAI Jin-ning, ZHOU Feng-yan, YU Dong-wei, LI Yao. Effects of Pinus sylvestris var.mongolicasand fixation plantations with different ages on soil pH in Zhanggutai, Liaoning Province.[J]. cje.