摘要
为探究城市排水污泥经厌氧消化后制成的有机营养土施入林地土壤后对其理化性质的影响。本文以北京平原沙地国槐和榆树生态林为试验对象,采用随机区组试验设计,选择0 kg/株(CK)、15 kg/株(T1)、30 kg/株(T2)、45 kg/株(T3)、60 kg/株(T4)、75 kg/株(T5)6个施用量进行对比试验,分别测定土壤容重、孔隙度、有机质、速效钾、碱解氮等理化性质指标的变化情况。与CK相比,T3-T5显著降低了榆树种植区0-20 cm土层的土壤容重,T5显著降低了榆树种植区20-40 cm土层的土壤容重,T4、T5显著降低了国槐种植区0-20 cm土层的土壤容重;T4、T5显著增加了榆树种植区0-20 cm土层的土壤孔隙度,T5显著增加了榆树种植区0-20 cm土层和国槐种植区20-40 cm土层的土壤孔隙度;T5显著提高了榆树种植区0-20 cm土层的土壤阳离子交换量及有机质、碱解氮、速效钾的含量,同时也提高了榆树种植区20-40 cm土层的速效钾含量。通过主成分分析表明,榆树种植区0-20 cm土层各个施用量下土壤肥力状况为T5>T4>T3>T1>T2>CK,20-40 cm土层为T5>T1>T2>T3>T4>CK,国槐种植区0-20 cm土层为T5>T4>T3>T1>T2>CK,20-40 cm土层为T2>T4>T3>T3>CK>T5。施用污泥制有机营养土可以改良北京平原沙地土壤的物理性质,使其容重显著减小,孔隙度显著上升,且均在60 kg/株或75 kg/株的高施用量下效果最好;施用污泥制有机营养土后国槐和榆树林地土壤电导率均在正常范围内,对林木生长不会产生负面效应。施用污泥制有机营养土对于国槐和榆树试验林地土壤pH值没有明显的影响;75 kg/株施用量会显著增加土壤中的阳离子交换量,提高土壤的缓冲能力和保肥能力;施有机营养土对于北京平原沙地土壤养分积累有影响,施后土壤中有机质、速效钾及碱解氮含量有所增长,并且在单株施用量75 kg时达到最大。主分量分析表明,施用污泥制有机营养土可以提高北京平原沙地的土壤肥力状况,并且在60 kg/株或75 kg/株的高施用量下效果最好。
To explore the effect of organic nutrient soil made from anaerobic digestion of urban sewage sludge into forest soil on its physical and chemical properties.Taking the Sophora japonica andUlmus pumila cological forest in the sandy land of Beijing Plain as the experimental objects,a randomized block experiment design was adopted,0kg/plant(CK),15kg/plant(T1),30kg/plant(T2),45kg/plant(T3),60kg/plant(T4),75kg/plant(T5)application rates were selected and compared to test the changes in soil bulk density,porosity,organic matter,available potassium,and alkali-hydrolyzable nitrogen and other physical and chemical properties.Compared with CK,T3-T5 significantly reduces the soil bulk density of the 0-20cm soil layer in the Ulmus pumila planting area,T5 significantly reduces the soil bulk density of the 20-40cm soil layer in the U.pumila planting area,T4 and T5 significantly reduced the soil bulk density of the 0-20cm soil layer in the Sophora japonica planting area;T4 and T5 significantly increased the soil porosity of the 0-20cm soil layer in the U.pumila planting area,and T5 significantly increased the soil porosity of the 0-20cm soil layer in the U.pumila planting area and the 20-40cm soil layer in the S.japonica planting area;T5 significantly increased the soil cation exchange capacity and the content of organic matter,alkali-hydrolyzable nitrogen and available potassium in the 0-20cm soil layer of the U.pumila planting area,and also increased the available potassium content of the 20-40cm soil layer in the U.pumila planting area.The principal component analysis shows that the soil fertility status of the 0-20cm soil layer in the U.pumila planting area is T5>T4>T3>T1>T2>CK,and the 20-40cm soil layer is T5>T1>T2>T3>T4>CK,in the S.japonica planting area,the soil fertility status of the 0-20cm soil layer is T5>T4>T3>T1>T2>CK,and the 20-40cm soil layer is T2>T4>T3>T3>CK>T5.The application of sludge organic nutrient soil can improve the physical properties of sandy soil in the Beijing Plain,so that its bulk density is significantly reduced,and its porosity is significantly increased,and the effects are best at a high application rate of 60kg/plant or 75kg/plant;After applying sludge organic nutrient soil,the soil electrical conductivity of the S.japonica and U.pumila forest land was within the normal range,and would not have a negative effect on the growth of forest trees.The application of sludge organic nutrient soil has no obvious effect on the soil pH value of the S.japonica and U.pumila forest;The application rate of 75kg/plant will significantly increase the cation exchange capacity in the soil,improve the buffering capacity and fertilizer retention capacity of the soil;The application of organic nutrient soil has an impact on the accumulation of soil nutrients in the sandy land of the Beijing Plain.After application,the content of organic matter,available potassium and alkali-hydrolyzable nitrogen in the soil increased,and reached the maximum at a single plant application rate of 75kg.Principal component analysis shows that the application of sludge organic nutrient soil can improve the soil fertility status of the sandy land in Beijing Plain,and the effect is best at a high application rate of 60kg/plant or 75kg/plant.
作者
杨文彬
王海东
彭祚登
马富亮
孙昱
孙文彦
彭玉信
YANG Wen-bin;WANG Hai-dong;PENG Zuo-deng;MA Fu-liang;SUN Yu;SUN Wen-yan;PENG Yu-xin(Forestry Collage of Beijing Forestry University,Beijing 100083,China;Beijing City drainage Refco Group Ltd.,Beijing 100124,China;HuangfaNursery,Beijing102602,China)
出处
《山东农业大学学报（自然科学版）》
北大核心
2021年第4期559-566,共8页
Journal of Shandong Agricultural University：Natural Science Edition
基金
国家发改委环境污染第三方治理“北京市污泥资源化苗圃种植项目”
北京排水集团污泥资源化苗圃种植项目(2017HXFWLXY023)。
关键词
污泥制有机营养土
国槐
榆树
土壤理化性质
Sludge organic nutrient soil
Sophora japonica
Ulmus pumila
soil physical and chemical properties
