Adsorption and degradation of imazapic in soils under different environmental conditions

被引:22
|
作者
Su, Wangcang [1 ]
Hao, Hongdan [1 ]
Ding, Mingzhen [2 ]
Wu, Renhai [1 ]
Xu, Hongle [1 ]
Xue, Fei [1 ]
Shen, Changchao [1 ]
Sun, Lanlan [1 ]
Lu, Chuantao [1 ]
机构
[1] Henan Acad Agr Sci, Inst Plant Protect, Key Lab Integrated Pest Management Crops Southern, Henan Key Lab Crop Pest Control, Zhengzhou, Henan, Peoples R China
[2] Nanjing Univ, Jinling Coll, Nanjing, Jiangsu, Peoples R China
来源
PLOS ONE | 2019年 / 14卷 / 07期
关键词
HERBICIDE; SORPTION; BIODEGRADATION; IMAZETHAPYR; PERSISTENCE; CARRYOVER; PH; TEMPERATURE; PEANUT; MAIZE;
D O I
10.1371/journal.pone.0219462
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Imazapic is widely used in peanut production, and its residues can cause damage to succeeding crops planted in the following year. The planting area of peanut is large in Henan province. Inceptisol is the main soil type in Henan Province and was used in laboratory experiments that were conducted to investigate imazapic degradation in soil under various environmental conditions. The results indicated that the imazapic degradation rate increased with an increase in temperature, soil pH, and soil moisture, and decreased with organic matter content. The use of biogas slurry as a soil amendment accelerated imazapic degradation. The half-life of imazapic in sterilized soil (364.7 d) was longer than in unsterilized soil (138.6 d), which suggested that there was a significant microbial contribution to imazapic degradation. Imazapic adsorption was also examined and was found to be well described by the Freundlich isotherm. The results indicate that soil has a certain adsorption capacity for imazapic.
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页数:11
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