Biochar derived from invasive plants improved the pH,macronutrient availability and biological properties better than liming for acid rain-affected soil  

作　　者：Yazheng Li Ahmed I.Abdo Zhaoji Shi Abdel-Rahman M.A.Merwad Jiaen Zhang 

机构地区：[1]Department of Ecology,College of Natural Resources and Environment,South China Agricultural University,Guangzhou 510642,China [2]Guangdong Provincial Key Laboratory of Utilization and Conservation of Food and Medicinal Resources in Northern Region,Yingdong College of Biology and Agriculture,Shaoguan University,Shaoguan 512005,China [3]Soil Science Department,Faculty of Agriculture,Zagazig University,Zagazig 44519,Egypt [4]Guangdong Laboratory for Lingnan Modern Agriculture,Guangdong Provincial Key Laboratory of Eco-Circular Agriculture,South China Agricultural University,Guangzhou 510642,China [5]Guangdong Engineering Technology Research Centre of Modern Eco-Agriculture and Circular Agriculture,Guangzhou 510642,China

出　　处：《Biochar》2023年第1期1029-1044,共16页生物炭（英文）

基　　金：National Natural Science Foundation of China(U1701236);Laboratory of Lingnan Modern Agriculture Project(NT2021010);Science and Technology Planning Project of Guangdong Province of China(grant number 2019B030301007);Special Funds for the Cultivation of Guangdong College Students’Scientific and Technological Innovation(grant number pdjh2020b0092).

摘　　要：Rapid development in industrialization and urbanization causes serious environmental issues,of which acid rain is one of the quintessential hazards,negatively affecting soil ecology.Liming has been investigated for a long time as the most effective amendment to alter the adverse effects of soil acidity resulting from acid rain.Herein,this study tested the biochar produced from invasive plants as an alternative amendment and hypothesized that biochar can maintain better availability of macronutrients under acid rain than liming by improving soil chemical and biological properties.Therefore,a pot experiment was conducted to compare the effects of lime and biochar at two rates(1%and 3%)on soil available nitrogen(N),phosphorous(P)and potassium(K)under simulated acid rain of two pH levels(4.5:pH_(4.5) and 2.5:pH_(2.5))as compared with tap water(pH7.1)as a control treatment.Biochar was produced using different invasive plants,including Blackjack(Biden Pilosa),Wedelia(Wedelia trilobata)and Bitter Vine(Mikania micrantha Kunth).Liming decreased the availability of soil N,P,and K by 36.3%as compared with the control due to the great increment in soil pH and exchangeable calcium(Ca^(2+))by 59%and 16-fold,respectively.Moreover,liming reduced the alpha diversity of soil bacteria and fungi by 27%and 11%,respectively.In contrast,biochar at different types and rates resulted in a fourfold increment in the available N,P,and K as an average under acid rain(pH_(4.5) and pH_(2.5))owing to maintaining a neutral pH(6.5-7),which is the most favorable level for soil microbial and enzymatic activites,and the bioavailability of soil nutrients.Furthermore,biochar caused balanced increments in Ca^(2+)by threefold,cation exchange capacity by 45%,urease activity by 16%,and fungal diversity by 10%,while having a slight reduction in bacterial diversity by 2.5%.Based on the path,correlation,and principal component analyses,the exchangeable aluminum was a moderator for the reductions in macronutrients’availability under acid rain,which decrease

关 键 词：Acidic soil LIMING Invasive plants Biochar feedstock Soil chemical properties 

分 类 号：S15[农业科学—土壤学]