|Table of Contents|

Effects of Biogas Residues on Yield of Cowpea and Heavy Metal Accumulation in Cowpea and Soil

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2018年03
Page:
125-129
Research Field:
Publishing date:

Info

Title:
Effects of Biogas Residues on Yield of Cowpea and Heavy Metal Accumulation in Cowpea and Soil
Author(s):
QIN Wendi; XIA Jinliang; JIANG Hubo; HUANG Lingzhi; XU Tiechun; LI Jinhuai
Guangxi Zhuang Autonomous Region Forestry Science Research Institute/Guangxi Key Laboratory of Superior Timber Trees Resource Cultivation,Nanning,Guangxi 530002
Keywords:
biogas residues; cowpea; yield; heavy metal
PACS:
-
DOI:
10.11937/bfyy.20171577
Abstract:
To achieve rational and safe use of biogas residue,a field experiment was carried out to study the effects of the biogas residues on the yield of cowpea and heavy metal accumulation in cowpea and soil.Different treatment combinations were set,i.e.,control （CK,without applying any fertilizer),group 1 of biogas residues （applying biogas residue at 1 000 kg per 667 m2),group 2 of biogas residues （applying biogas residue at 1 500 kg per 667 m2),group 3 of biogas residues （applying biogas residue at 2 000 kg per 667 m2),group of mixture of biogas residues and pig manure （applying biogas residue at 1 000 kg plus pig manure at 1 000 kg per 667 m2),pig manure （applying pig manure at 2 000 kg per 667 m2).The results showed the yield of each treatment was higher than that of control （CK).The yield were 689.85,921.55,1062.08,950.54,1 354.91 kg per 667 m2 for group 1 of biogas residues,group 2 of biogas residue,group 3 of biogas residues,group of pig manure,group of mixture of biogas residues and pig manure,and increased by 213.16%,318.33%,382.13%,331.49% and 515.07% compared with the yield of group of CK （220.29 kg per 667 m2),respectively.After harvest,the heavy metal in the edible cowpea was lower than the value of the National Standards （GB 2762-2012).But the content of some heavy metals in soil were higher and above the range of the National Standards of the soil with higher application amount of biogas residues.The content of Pb was 69.902 mg?kg-1 in soil with application of group 3 of biogas residues,was increased by 385.667% compared with the content before planting,and the content was above the range of the National Primary Standard （35 mg?kg-1) of the soil.Higher application of biogas residues caused rise of heavy metal in soil．

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Last Update: 2018-02-09