植被的人工恢复对典型黑土有机质组分影响的时效性  

Timeliness Effects of Artificial Restoration of Vegetation on Soil Organic Matter Fractions of Typical Black Soil

作　　者：潘鹤 周桐 韩少杰[2] 张扬[2] 鲍鸿君 陈祥伟[2] 夏祥友[1] Pan He;Zhou Tong;Han Shaojie;Zhang Yang;Bao Hongjun;Chen Xiangwei;Xia Xiangyou(Northeast Forestry University,Harbin 150040,P.R.China;Chifeng Hongshan Suburban Forest Farm)

机构地区：[1]东北林业大学林学院,哈尔滨150040 [2]东北林业大学,哈尔滨150040 [3]赤峰市红山区城郊林场

出　　处：《东北林业大学学报》2022年第5期95-99,共5页Journal of Northeast Forestry University

基　　金：“十四五”国家重点研发计划项目(2021YFD1500705);黑龙江省应用技术研究与开发计划项目(GA20B401);中央高校基本科研业务费专项基金项目(2572020DR02)。

摘　　要：以黑龙江省克山农场(48°12′~48°23′N,125°8′~125°37′E)林龄分别为21、35、46、55年生落叶松(Larix gmelinii)人工林(分别代表植被不同恢复阶段)土壤为研究对象,以相邻耕地(代表植被恢复前阶段)、天然次生林(未经开垦干扰,代表开垦前阶段)土壤为对照,以表层(0~20 cm)土壤总有机质、游离态有机质、物理保护态有机质、矿质结合态有机质中碳质量分数为评价指标,分析人工恢复植被对土壤有机质及其组分的动态影响。结果表明:46、55年生落叶松人工林土壤总有机质碳质量分数,显著低于天然次生林土壤的、显著高于耕地土壤的(P<0.05);35、46、55年生落叶松人工林土壤的游离态有机质碳质量分数,均显著高于耕地土壤的(P<0.05),与天然次生林土壤之间无显著性差异;35、46、55年生落叶松人工林土壤物理保护态有机质碳质量分数,均显著高于耕地土壤的(P<0.05),35、46年生落叶松人工林土壤的物理保护态有机质碳质量分数与天然次生林土壤的差异显著。综合研究结果表明,土壤游离态有机质碳质量分数、物理保护态有机质碳质量分数,是人工恢复植被对黑土表层土壤有机质及其组分影响的主要评价指标;由于土壤游离态有机质恢复的时限更短,可将土壤游离态有机质作为评价黑土土壤有机质变化的敏感性指标。To explore the dynamic effects of artificial restoration of vegetation on surface(0-20 cm)soil organic matter and its fractions of black soil,the carbon content of the bulk soil organic matter,the free organic matter,the physically protected organic matter and the mineral-associated organic matter in the larch(Larix olgensis Henry)plantations with 21,35,46 and 55 a(representing the different stages of vegetation restoration),the adjacent cultivated land(representing the stage before vegetation restoration)and natural secondary forest(representing the stage before reclamation as there is no reclamation interference)in Keshan Farm(48°12′-48°23′N,125°8′-125°37′E),Heilongjiang Province was measured and analyzed.The bulk soil organic matter carbon content in the larch plantations with 46 and 55 a was significantly higher than that in the cultivated land,but was significantly lower than that in the natural secondary forest(P<0.05).The soil free organic matter carbon content in the larch plantations with 35,46 and 55 a was significantly higher than that in the cultivated land(P<0.05).At the same time,there was no significant difference in the soil free organic matter carbon content between the larch plantations with 35,46 and 55 a and the natural secondary forest.The soil physically protected organic matter carbon content in the larch plantations with 35,46 and 55 a was significantly higher than that in the cultivated land(P<0.05),the difference between the soils of 35 and 46 a larch plantations in the soils of physically protected organic matter carbon content and the natural secondary forests was significant.The comprehensive research results show that the effect of artificial vegetation restoration on black soil surface soil organic matter and its fractions of black soil were mainly achieved by increasing the content of free organic matter and physically protected organic matter.Organic matter was used as a sensitive index to evaluate the change of soil organic matter in black soil.Soil free organic matte

关 键 词：黑土 落叶松人工林 植被恢复 游离态有机质 物理保护态有机质 矿质结合态有机质 

分 类 号：S714.2[农业科学—林学] S157.2