Dynamic transformation of carbon in agricultural waste-compost and its fertilizer efficiency in citrus planting

doi:10.14088/j.cnki.issn0439-8114.2020.02.007

Abstract

Abstract: The dynamic composition and quantity of organic carbon in composting were analyzed by Van Soest analysis method, its influence mechanism on product quality during composting was also analyzed combined with procedure parameter. The results showed that, the duration of the high temperature period was 36 days, pH was 8.11, moisture content was 25.17%, OM was 52.34%, TN was 5.41%, effective number of viable bacteria was 9.6×10⁸ CFU/g, value of escherichia coli was 35 CFU/g, mortality of ascarid egg was 98%, germination index was 93.09%, which satisfied the requirements of NY 8884-2012 for biological organic fertilizer. The insoluble components of LIG, HEM and CEL in carbon composition were significantly correlated with total nutrients, OM, C/N（correlation coefficient was all greater than 0.875）. The degradation of insoluble macromolecular substances into small molecular substances which easily used by microorganisms is the key factors to improve the quality of fertilizer, whereas the loss of TOC will significantly reduce the quality of fertilizer. The application of the organic fertilizer in citrus plantations showed that the organic fertilizer could improve the quality and yield of citrus. The best quality and maximum yield of citrus were got with the application amount of 2.0 kg/m².

Key words: composting, citrus waste, resource utilization, carbon composition, effect of fertilization

CLC Number:

LIAO Lei, XIONG Feng, ZHOU Yue-ming, LEI Yang-ming. Dynamic transformation of carbon in agricultural waste-compost and its fertilizer efficiency in citrus planting[J]. HUBEI AGRICULTURAL SCIENCES, 2020, 59(2): 30-36.

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