水耕对草甸黑土不同开垦年限土壤腐殖质组成含量的影响  

Effects of Hydroponics on Soil Humus Composition of Meadow Black Soil under Different Cultivation Years

作　　者：张新月 周榆越 焦峰[1] Zhang Xinyue;Zhou Yuyue;Jiao Feng(College of Agronomy,Heilongjiang Bayi Agricultural University,Daqing 163319)

机构地区：[1]黑龙江八一农垦大学农学院,大庆163319

出　　处：《黑龙江八一农垦大学学报》2023年第6期14-18,共5页journal of heilongjiang bayi agricultural university

基　　金：国家科技支撑计划子课题(2015BAD23B05-07);黑龙江省自然科学基金项目(D2018005)。

摘　　要：为明确三江平原不同开垦年限下水田土壤腐殖质组分含量的变化规律,以东北三江平原水田不同开垦年限的草甸黑土为调查对象。试验结果表明,旱田耕作改为水田耕作后,随着开垦年限的增加,草甸黑土的土壤腐殖质各个组分含量的变化不同,草甸黑土胡敏酸和富里酸含量均随水耕年限的增加呈先降低再升高趋势,胡敏素含量表现为先降低后平稳趋势,且草甸黑土耕层土壤内各含量变化幅度均大于犁底层和心土层土壤。草甸黑土PQ值在改为水耕后,随着开垦年限的增加,耕层和犁底层土壤表现先上升后平稳趋势,而心土层土壤PQ值先下降再上升。草甸黑土在由旱田改为水耕后,土壤中腐殖质各组分含量变化速率不同,耕层土壤腐殖化程度均大于犁底层和心土层土壤,东北黑土区荒地开垦种稻后土壤向水田方向演变。To clarify the variation of soil humus component content in paddy field under different reclamation years in the Sanjiang Plain.The meadow black soil in Sanjiang Plain of Northeast China was investigated under different reclamation years.The results showed that with the increase of reclamation years,the content of each component of soil humus in meadow black soil changed differently after upland tillage was changed to paddy tillage,the content of humic acid and fulvic acid in meadow black soil decreased first and then increased with the increase of hydroponic years,and the content of humic acid decreased first and then stabilized,in addition,the variation range of each content in the plough layer soil of meadow black soil was greater than that in the bottom layer and the core layer soil of plough.With the increase of reclamation years,the PQ values of the bottom soil of plough layer and plough layer increased first and then showed a steady trend,while the PQ values of the middle soil layer decreased first and then increased.The change rate of humic components in meadow black soil was different after changing from upland to hydroponics,and the humic degree of soil in plough layer was higher than that in bottom layer and core layer.The soil in the black soil region of northeast China changed to paddy field after reclamation and planting rice.

关 键 词：黑土 垦殖年限 稻田土壤 腐殖质 

分 类 号：Q78[生物学—分子生物学]