Complementary effect of zoo compost with mineral nitrogen fertilisation increases wheat yield and nutrition in a low-nutrient soil

查看全文 作　　者：Muhammad [1,2]S.A.KHAN;Lynette [1]K.ABBOTT;Zakaria [1]M.SOLAIMAN;Peter [3]R.MAWSON;Ian [1]S.WAITE;Sasha [1]N.JENKINS

机构地区：[1]School of Agriculture and Environment,Institute of Agriculture,The University of Western Australia,Perth WA 6009,Australia;[2]Perth Zoo,Department of Biodiversity,Conservation and Attractions,Perth WA 6151,Australia;[3]Agricultural Officer(Headquarters),Directorate,Soil Fertility Research Institute,Agriculture Department,Government of the Punjab,Lahore 53700,Pakistan

出　　处：《Pedosphere》索引2022年第32卷第2期,共9页

基　　金：M. S. A. Khan thanks the Australian Government for providing postgraduate degree scholarship under its Australia Awards Program;The Sir Eric Smart Family contributed funds for this research through the Institute of Agriculture, The University of Western Australia;The salaries of S. N. Jenkins and I. S. Waite were partially supported by RnD4Profit-14-1-022-Waste to Revenue: Novel Fertilisers and Feeds, Australian Pork Limited, and Australian Government (Department of Agriculture and Water Resources) as part of the Rural Research and Development (R&D) for Profit Program。 摘　　要：Excess nitrogen(N) fertiliser use in agriculture is associated with water pollution and greenhouse gas emissions.While practices and programs to reduce N fertiliser application continue to be developed,inefficient fertiliser use persists.Practices that reduce mineral N fertiliser application are needed in a sustainable agricultural ecosystem to control leaching and gaseous losses for environmental management.This study evaluated whether fully or partially replacing mineral N fertiliser with zoo compost(Perth Zoo) could be a good mitigation strategy to reduce mineral N fertiliser application without affecting wheat yield and nutrition.To achieve this,a glasshouse experiment was conducted to assess the complementary effect of zoo compost and mineral N fertiliser on wheat yield and nutrition in a sandy soil of southwestern Australia.Additionally,a chlorophyll meter was used to determine whether there was a correlation between chlorophyll content and soil mineral N content,grain N uptake,and grain protein content at the tillering(42 d after sowing(DAS)) and heading(63 DAS) growth stages.The standard practice for N application for this soil type in this area,100 kg ha^(-1),was used with a soil bulk density of 1.3 g cm^(-3) to calculate the amount of mineral N(urea,46% N) and Perth Zoo compost(ZC)(0.69% N) for each treatment.Treatments comprised a control(no nutrients added,T1),mineral N only(100 kg N ha^(-1),T2),ZC only(100 kg N ha^(-1),T7),and combinations of mineral N and ZC at different rates(mineral N at 100 kg N ha^(-1)+ ZC at 25 kg N ha^(-1)(T3),mineral N at 75 kg N ha^(-1)+ ZC at 25 kg N ha^(-1)(T4),mineral N at 75 kg N ha^(-1)+ ZC at 50 kg N ha^(-1)(T5),and mineral N at 50 kg N ha^(-1)+ ZC at 50 kg N ha^(-1)(T6)).The T6 treatment significantly increased grain yield(by 26%) relative to the T2 treatment.However,the T7 treatment did not affect grain yield when compared to the T2 treatment.All treatments with mineral N and ZC in combination significantly improved the 1 000-grain weight compared to the T2 treatment.Chlorophyll content was better correlated with soil mineral N content(r = 0.61),grain N uptake(r = 0.62),and grain protein content(r = 0.80) at heading(63 DAS) than at tillering(42 DAS).While ZC alone could not serve as an alternative to mineral N fertiliser,its complementary use could reduce the mineral N fertiliser requirement by up to 50% for wheat without compromising grain yield,which needs to be verified in the field.Chlorophyll content could be used to predict soil mineral N at the heading stage,and further studies are warranted to verify its accuracy in the field.Overall,the application of ZC as part of integrated nutrient management improved crop yield with reduced N fertiliser application. 关键词：chlorophyll meter SPAD measurement integrated nutrient management nitrogen use efficiency reduced N fertiliser application wheat yield

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Complementary effect of zoo compost with mineral nitrogen fertilisation increases wheat yield and nutrition in a low-nutrient soil

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