Effects of Bio-bacteria-fertilizer Combined with Biochar on Soil Properties and Dissolved Soil N and C UV Spectral Characteristics in Tobacco Growing Soil

doi:10.7668/hbnxb.2018.06.031

Abstract

Abstract: A field experiment was conducted to study the effect of compound-organic-bio-bacteria-fertilizer or/and biochar on soil properties and dissolved soil N and C in the tobacco-growing soil.Seven treatments were set as:①no organic fertilizer (CK),②biochar(T1),③Compound-organic-bio-bacteria-fertilizer (COBBF, T2),④Bio-bacteria-biochar-fertilizer(T3),⑤50% COBBF+50% biochar(T4)⑥60% COBBF+40% biochar(T5),⑦40% COBBF+60% biochar(T6). The result showed the soil nutrient was significantly improved under treatments with organic fertilizer application.The ammonium nitrogen content under T2 treatment was significantly promoted after tobacco transplanted 60 d compared with other treatments.The nitrate nitrogen content under T5 treatment was improved in the whole growth stage. The soil available potassium content under T2 and the soil available, phosphorus under T5 treatments were increased after tobacco transplanted 60 d compared with other treatments.The DOC content and DOC/SOC were obviously promoted under T1 and T3 treatments compared with other treatments, the highest DOC/SOC ratio as 8.31 mg/g occurred under T3 treatment. The DON content under T2 treatment peaked as 57.09 mg/kg after tobacco transplanted 90 d, while which reached as 97.98 mg/kg under T5 treatment during tobacco transplanted 60 d; Aromaticity index (AI) was reduced under T3,T4,T5 and T6 treatments. The E2/E3 was increased during tobacco transplanted 90 d. In conclusion, in central area of Henan Province, it is suggested that the COBBF only and 60% COBBF+40% biochar application were the optimal practice to improve soil N content;while biochar only and Bio-bacteria-biochar-fertilizer application could improve the soil dissolved C.

Key words: Biochar, Compound-organic-bio-bacteria-fertilizer, Soil nutrient, Soil dissolved organic carbon/nitrogen, Tobacco planting soil, Spectral characteristics

CLC Number:

S144.2

LI Ying, LI Bin, LIU Dongyang, JIANG Guiying, SHEN Fengmin, LIU Shiliang. Effects of Bio-bacteria-fertilizer Combined with Biochar on Soil Properties and Dissolved Soil N and C UV Spectral Characteristics in Tobacco Growing Soil[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2018, 33(6): 227-234. doi: 10.7668/hbnxb.2018.06.031.

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