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Date of Publication:2022-10-10

Journal:环境科学与技术

Volume:37

Issue:1

Page Number:7-12

ISSN No.:1003-6504

Abstract:Effects of biogas slurry spraying on plant growth,yield,disease and
   insect pest situation,and heavy metals residue of kidney bean were
   studied in field trials. Results showed that biogas slurry spraying
   facilitated root growth, increased fruit amount,strengthened resistance
   to common bacterial blight in common beans (Xanthomonas campestris)and
   the common bean rust disease (Uromyces appendiculatus),and reduced
   chewing of the 28-spotted potato ladybird (Henosepilachna
   vigintioctopunctata). An increase about 17.6% in the yield of kidney
   bean was obtained. In kidney bean samples,Pd was not detected,and
   concentrations for Zn,Cu,Cr,Cd were observed in the range of 31.93~38.88
   mg/kg,5.56~8.29 mg/kg, 0.64~1.29 mg/kg,0.09~0.15 mg/kg respectively.
   Levels of heavy metals after biogas slurry spraying were below maximum
   levels of Contaminants Limit in Foods of GB 2762-2005. Analysis of total
   target hazard quotient(TTHQ)showed that kidney bean was edible without
   obvious health risks. However,potential health risk for child and urban
   population was higher than adult and rural population respectively.

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