Impacts of biochar and Trichoderma enriched bio-organic fertilizer on nitrogen using efficiency,yields and product values of flue-cured tobacco in reddish paddy fields
[Objective]This study aims to explore the optimal application amount of biochar and Trichoderma bio-organic fertilizer under the'rice-tobacco'rotation mode in red soil area,thus providing a new path for promoting early growth and rapid development of flue-cured tobacco and increasing production value and resource efficiency.[Method]A field trial was conducted to investigate the optimal application rates of biochar(B)and Trichoderma enriched bio-organic fertilizer(OF)in the rice-tobacco rotation system of reddish paddy fields.The interactive effects of different application rates(0 kg/hm2,low dose(750 kg/hm2)and high dose(1 500 kg/hm2),respectively)of B and OF on the dry matter accumulation(DMA),root volume,ratio of root to shoot,partial factor productivity from chemical N fertilizer(PFPN),yield and the economic benefits of FCT plants were investigated.[Result]The interaction between B and OF significantly affected the growth,N using efficiency,yield and economic benefits of FCT.Compared with no B(B0),applying B can increased root volume(6.6%-54.0%),DMA(2.3%-15.3%),ratio of root to shoot(8.0%-44.4%),PFPN(3.1%-6.0%),and economic benefits(1.6%-8.3%)of FCT,respectively.The practice of applying 750 kg/hm2 of biochar achieved the optimal effect.Moreover,compared with no OF(OF0),applying 750 kg/hm2 of OF significantly increased the root volume(3.5%-23.2%),DMA(5.3%-18.3%),ratio of root to shoot(8.7%-13.0%),yield(5.2%),and PFPN(19.6%-35.5%)of FCT.However,the application of high dose of OF significantly reduced DMA by 6.01%and root volume by 7.0%-10.4%at the later growth stage of FCT.In addition,compared with no B and OF(B0OF0),the practices of combining B and OF replaced not onlymineral N fertilizer(15%),but also the DMA,root volume,ratio of root to shoot,yields,economic values and PFPN of FCT exhibit varying degrees of improvements.[Conclusion]Therefore,the application of biochar and Trichoderma bio-organic fertilizer can not only effectively promote the dry matter accumulation and root growth of flue-cured tobacco plants,but also effectively improve the yield,average price and product value of flue-cured tobacco and the partial productivity of nitrogen fertilizer,which has important theoretical and practical application value for promoting the green production of flue-cured tobacco in red soil paddy fields.
flue-cured tobaccobiocharTrichoderma bio-organic fertilizerPFPNyield and product value
万方数据
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