摘要
生物质炭是一种具有前景的土壤改良剂,目前针对铁改性油菜秸秆生物质炭对茶园土壤养分淋失的研究相对较少。通过向茶园土壤中添加改性、未改性油菜秸秆生物质炭(炭土质量比分别为1%、3%和5%)后开展土柱淋溶及土壤培养实验,研究铁改性或未改性油菜秸秆生物质炭作用于土壤养分淋失及酶活性(蔗糖酶、酸性磷酸酶、脲酶和过氧化氢酶)的变化规律,旨在分析和比较铁改性及未改性生物质炭对茶园土壤微生物活性及养分循环的影响。结果表明,添加生物质炭可增加茶园土壤的保水能力,土壤水分累积淋溶量随生物质炭添加量的增加显著减少,添加5%的改性生物质炭(g3)及未改性生物质炭(w3)分别较未添加生物质炭的土壤(CK)减小7.70%和16.98%。g3处理对土壤硝态氮和磷酸盐的固持作用最为显著,淋失量较CK处理分别减少31.82%和60.56%。生物质炭对茶园土壤酶活性存在一定促进作用,但添加改性或未改性生物炭对土壤酶活性的影响存在明显差异。其中,w3中土壤脲酶、蔗糖酶分别显著高于其他处理14.85%~25.10%和19.00%~48.98%,添加3%未改性生物质炭(w2)后,土壤过氧化氢酶活性高出其他处理2.14~29.33μmol·h^(-1)·g^(-1);g3处理对酸性磷酸酶促进作用最强。总的来说,未改性生物炭在增强茶园土壤持水能力及促进土壤酶活性方面要优于铁改性生物炭,而改性生物质炭对土壤氮磷养分的固持作用更为显著。因此,为改善茶园土壤质量,提高土壤肥力,应适量选取铁改性生物质炭。
Biochar is considered to be a potential soil amendment.However,few research was focused on the influence of iron modified rape straw biochar on the nutrient leaching in tea garden soil.In this study,a soil col-umn leaching experiment and an incubation experiment were carried out with a tea gardens soil(a yellow brown soil)amended with 1%,3%and 5%(carbon soil mass ratio)of modified or unmodified rape straw biochar.Soil nutrient loss and enzyme(sucrase,acid phosphatase,urease,and catalase)activities were analyzed respectively in order compare the effects of iron-modified and unmodified biochars on soil nutrient cycling and microbial activity in tea garden soil.The results showed that the biochar(modified or not)amendment increased the water retention capacity of the tea garden soil.And the more biochar addition,the less cumulative leachate from soil columns.The cumulative leaching amount of soils with 5%modified biochar(g3)and 5%unmodified biochar(w3)decreased by 7.70%and 16.98%respectively compared to the untreated one(CK).Besides,g3 had the most significant Immobilization effect on soil nitrate and phosphate.The total nitrate and phosphate leached from g3 were 31.82%and 60.56%lower than those in CK respectively.Biochar addition promoted soil enzyme activities,and there were significant differences between the enzyme activities in soil with Fe-modified biochar and unmodified one.Urease and sucrase activities in w3 increased by 14.85%-25.10%and 19.00%-48.98%,respectively,compared with other treatments.The catalase activity in soil with 3%unmodified biocar addition(w2),2.14-29.33μmol·^(-1)·g^(-1),was higher than those in other treatments.And g3 had the most positive effection on the acid phos-phatase activty.In general,unmodified biochar was superior to the Fe-modified biochar in enhancing the water holding capacity and promoting enzyme activities of the tea garden soil,while the Fe-modified biochar had a more significant immobilization effect on soil nitrogen and phosphorus.In general,in order to improve the qua
作者
钱婧
蔡青松
周肖瑜
黄显怀
华露露
QIAN Jing;CAI Qingsong;ZHOU Xiaoyu;HUANG Xianhuai;HUA Luu(School of Environment and Energy Engineering,Anhui Jianzhu University,Hefei 230601;Anhui Provincial Key of Environ-mental Pollution Control and Resource Reuse,Anhui Jianzhu University,Hefei 230601;Plant Protection and Quarantine&Tillage Fertilizer Management Station,Huzhou 313099)
出处
《安徽农业大学学报》
CAS
CSCD
2023年第4期664-672,共9页
Journal of Anhui Agricultural University
基金
安徽省高校省级自然科学研究项目-创新团队(2022AH010019)
安徽省高校省级自然科学研究项目(KJ2019A0754)
校招引进人才及博士启动基金(2018QD13)
省级大学生创新训练项目(S202310878091)共同资助。
关键词
铁改性生物质炭
茶园土壤
酶活性
土柱淋溶
氮磷流失
iron modified biochar
tea garden soil
enzyme activity
soil column leaching
nitrogen and phosphorus loss
