生态学杂志2024，Vol.43Issue(7)：2134-2142,9.DOI:10.13292/j.1000-4890.202407.005
不同滴灌方式下生物炭对采煤沉陷区花生根系形态及土壤无机氮的影响
Effects of biochar on root morphological traits of peanut and soil inorganic nitrogen in coal mining subsid-ence area under different drip irrigation methods
摘要
Abstract
The reclamation of coal mining subsidence area is one of the challenges in coal mining area.We exam-ined the effects of different drip irrigation methods and biochar application rates on peanut yield in coal mining sub-sidence area.A split-plot design experiment was conducted with two irrigation methods(i.e.,film-mulched drip ir-rigation(M)and shallow buried drip irrigation(Q))as the primary plots,and three biochar application rates(0(B0),10(B10),and 20 t·hm-2(B20))as the subplots in 2021 and 2022.Root growth,dry matter,nitrogen ac-cumulation in dry matter,yield and yield components,and soil inorganic nitrogen content were measured.Com-pared with the shallow buried drip irrigation,the film-mulched drip irrigation significantly increased root length,root volume,root surface area,dry matter accumulation at pod filling stage,100-kernel mass,100-fruit mass,and pod yield,but decreased soil NH4+-N and NO3--N contents.Pod yield,100-kernel mass,and 100-fruit mass under the film-mulched drip irrigation were 14.9％,8.9％,and 6.3％higher than those under the shallow buried drip irri-gation,respectively.Root length(except at the seedling stage),root volume(except at the seedling and pod set-ting stages),root surface area(except at the seedling stage),dry matter accumulation at the pod filling stage,100-fruit mass,100-kernel mass,and grain yield initially increased and then decreased with increasing biochar ap-plication rates.The peak values were observed under the B10 treatment,the pod yield under which was 19.8％high-er than under the B0 treatment.Soil NH4+-N content(except at the seedling stage)decreased while soil NO3--N content(except the seedling stage)and plant N accumulation increased with increasing biochar application rates.Under MB 10 treatment,root length,root volume(except at pod setting stage),root surface area(except at seed-ling stage),dry matter accumulation at pod filling stage,100-fruit mass,100-kernel mass and yield were all opti-mal,with the yield being 38.8％higher than that under QB0 treatment.Peanut yield,100-kernel mass,and 100-fruit mass had a significant and positive correlation with total root length and root surface area.The 100-fruit mass was significantly and positively correlated with soil NH4+-N and NO3--N contents.In conclusion,the application of 10 t·hm-2 biochar combined with film-mulched drip irrigation promoted root growth of peanut,improved plant in-organic nitrogen absorption,increased dry matter accumulation,and finally increased yield.Our findings would pro-vide technical support and theoretical reference for land reclamation in coal mining subsidence areas.关键词
花生/膜下滴灌/生物炭/采煤沉陷区/产量Key words
peanut/film-mulched drip irrigation/biochar/coal mining subsidence area/yield引用本文复制引用
陈东,周欣,姜浩,郑俊林..不同滴灌方式下生物炭对采煤沉陷区花生根系形态及土壤无机氮的影响[J].生态学杂志,2024,43(7):2134-2142,9.基金项目
国家重点研发计划项目(2016YFC0501109)、国家自然科学基金项目(52209063)、辽宁省博士科研启动基金项目(2021-BS-143)、辽宁省教育厅科学研究项目(LJKZ0695)和神东矿区采煤沉陷区耕地复垦技术研究项目(202016000013)资助. （2016YFC0501109）
