文献类型：期刊文献

中文题名：生物质炭配施氮肥对雷竹林土壤微生物碳氮利用效率的影响

英文题名：The effect of biochar with nitrogen fertilizer on soil microbial carbon and nitrogen use efficiencies of Phyllostachys violascens

作者：毛忆莲[1,2] 葛晓改[1] 周军刚[3] 周本智[1] 高歌[1] 徐耀文[1] 邱磊[4]

第一作者：毛忆莲

机构：[1]中国林业科学研究院亚热带林业研究所,杭州311400;[2]南京林业大学南方现代林业协同创新中心,南京210037;[3]杭州市富阳区农业农村局,杭州311400;[4]杭州市建德新安江林场,杭州311600

年份：2024

卷号：44

期号：24

起止页码：11220-11228

中文期刊名：生态学报

外文期刊名：Acta Ecologica Sinica

收录：CSTPCD;;国家哲学社会科学学术期刊数据库;Scopus;北大核心:【北大核心2023】；CSCD:【CSCD2023_2024】；

基金：浙江省基础公益研究计划项目(LGN21C030002);国家自然科学基金(31600492,31670607)。

语种：中文

中文关键词：生物质炭;土壤微生物生物量碳氮磷;土壤酶活性;土壤碳氮利用效率

外文关键词：biochar;soil microbial carbon and nitrogen and phosphorus;soil enzyme activity;soil microbial carbon and nitrogen use efficiency

分类号：S714.3

摘要：为进一步促进雷竹林固碳培肥,于2019年通过野外试验研究生物质炭配施氮肥对土壤养分含量、碳氮转化酶活性和微生物碳氮利用效率的影响。试验设置3个生物质炭梯度B0、B1、B2,分别为0、10、30 t/hm^(2),3个氮肥梯度N0、N1、N2,分别为0、0.5、1 t/hm^(2),共计9种处理(B0N0、B0N1、B0N2、B1N0、B1N1、B1N2、B2N0、B2N1、B2N2)。结果表明:生物质炭和氮肥配施明显提升土壤有机碳、总氮、铵态氮含量,除土壤速效磷外,总体上B2N1和B1N1处理下土壤有机碳和土壤养分含量最高。微生物生物量碳、氮含量和β-葡糖苷酶活性在B2N1处理达到最高,较B0N0处理显著增加65.1%、293.1%和59.6%。微生物生物量磷含量、N-乙酰氨基葡糖苷酶和亮氨酸氨基肽酶活性在B2N2处理最高,较B0N0处理显著增加193.3%、119.6%和64.0%。土壤微生物碳利用效率(CUE)和土壤总氮、有机碳、硝态氮、铵态氮、速效磷及微生物生物量碳氮显著正相关(P<0.01),其中土壤有机碳、微生物生物量碳、硝态氮对CUE的解释率最高。土壤微生物氮利用效率(NUE)和土壤微生物生物量氮显著负相关(P<0.01),其中土壤微生物生物量氮、有机碳和铵态氮对NUE的解释率最高。总体上,生物质炭配施氮肥下CUE增加、NUE降低,说明雷竹林土壤微生物对碳的固存增加,对氮的矿化增强。因此,配施生物质炭可作为固碳培肥和地力提升的潜在措施,但生物质炭与氮肥配施对土壤微生物群落的长期影响尚不明确,仍需进一步研究。
In order to further promote carbon sequestration and fertilization in Phyllostachys violascens forest,the effects of biochar with nitrogen fertilizer on soil nutrient content,carbon and nitrogen transformation?related enzyme activities,and microbial carbon and nitrogen utilization efficiencies were investigated through a field experiment in 2019.The experiment was set up with three gradients B0,B1,B2 at 0,10,30 t/hm^(2),respectively,and three nitrogen fertiliser gradients N0,N1,N2 at 0,0.5,1 t/hm^(2),respectively,for a total of nine treatments(B0N0,B0N1,B0N2,B1N0,B1N1,B1N2,B2N0,B2N1,B2N2).The results showed that biochar and nitrogen fertilizers significantly enhanced soil organic carbon,total nitrogen,ammonium nitrogen,and available phosphorus contents,and there was also a significant interaction effectbetween the two(except for soil available phosphorus),and soil organic carbon and soil nutrient contents were the highestunder the B2N1 and B1N1 treatments in general.Microbial biomass carbon,nitrogen content andβ?glucosidase activitywere highest in the B2N1 treatment,with a significant increase by 65.1%,293.1%and 59.6%over the B0N0 treatment.Microbial phosphorus content,N?acetylamino glucosidase and leucine aminopeptidase activities were highest in the B2N2treatment with a significant increase by 193.3%,119.6%and 64.0%over the B0N0 treatment.Soil microbial carbon useefficiency(CUE)was significantly positively correlated with soil total nitrogen,soil organic carbon,nitrate nitrogen,ammonium nitrogen,available phosphorus and microbial carbon and nitrogen(P<0.01).Soil organic carbon,microbialcarbon and nitrate nitrogen had the highest explanatory rate for CUE.Soil microbial nitrogen use efficiency(NUE)wassignificantly negatively correlated with soil microbial biomass nitrogen(P<0.01),and soil microbial biomass nitrogen,soilorganic carbon and ammonium nitrogen had the highest explanatory rate for NUE.Overall,the increase of CUE and thedecrease of NUE under biochar with N fertilizer indicated that soil microbial sequestration of carbon increased mineralizationof nitrogen enhanced in Phyllostachys violascens forest.Therefore,the application of biochar can be a potential measure forcarbon sequestration and fertilization and land enhancement,but the long?term effects of biochar with N fertilizer on soilmicrobial communities are not clear,and the further research is still needed.