为了研制出对水稻移栽田一年生杂草防除效果优良且对水稻安全的除草剂品种,参照农药田间药效试验准则,采用稻田灌水整平后均匀甩施法开展了50%丙炔噁草酮·丁草胺·西草净乳油(EC)防除水稻移栽田杂草试验。试验结果表明,在有效...为了研制出对水稻移栽田一年生杂草防除效果优良且对水稻安全的除草剂品种,参照农药田间药效试验准则,采用稻田灌水整平后均匀甩施法开展了50%丙炔噁草酮·丁草胺·西草净乳油(EC)防除水稻移栽田杂草试验。试验结果表明,在有效成分推荐用量为600~900 g/hm2时,施药后40 d,50%丙炔噁草酮·丁草胺·西草净EC对一年生禾本科杂草稗草和多年生阔叶杂草野慈姑表现出良好的防除效果,而对一年生莎草科杂草萤蔺的防效一般。在试验过程中发现该除草剂品种900 g a.i/hm2以上的高剂量施用后对生长前期水稻具有轻微药害,但是施药5周后水稻生长恢复正常,对水稻产量没有明显影响。展开更多
There is a method for investigating the transformation of resistance gene of carbendazim into Trichoderma harzianum. In order to introduce the resistance to benzimidazole fungicide into bio-control microorganism Trich...There is a method for investigating the transformation of resistance gene of carbendazim into Trichoderma harzianum. In order to introduce the resistance to benzimidazole fungicide into bio-control microorganism Trichoderma harzianum was transformed with the resistance gene. In this study, we investigate resistance level and calculate EC 50 (effective concentration of carbendazim that can survive 50% of Trichoderma harzianum in that concentration) and stability of the resistance for the transformant isolate of Trichoderma harzianum. Results show the transformants can growth on the medium containing more than 1 000 μg/ml carbendazim and the resistance is stabled after 10 times transfer on non-selective medium and have EC 50 average about, 1 200 μg/ml.展开更多
[Objectives] This study was conducted to investigate the toxic effects of 2,2',4,4',5,5'-hexabromobiphenyl ether on Chlorella vulgaris and provide basic data for protecting aquatic ecosystems. [Methods] Th...[Objectives] This study was conducted to investigate the toxic effects of 2,2',4,4',5,5'-hexabromobiphenyl ether on Chlorella vulgaris and provide basic data for protecting aquatic ecosystems. [Methods] The acute toxicity effects of 2,2',4,4',5,5'-hexabromodiphenyl ether on C. vulgaris was investigated by the semi-static water contacting acute toxicity method. [Results] The 48,72 and 96 h-EC(50) of 2,2',4,4',5,5'-hexabromodiphenyl ether to C. vulgaris were23. 58,18. 71 and 14. 75 μg/L,respectively,and the safe concentration of 2,2',4,4',5,5'-hexabromodiphenyl ether to C. vulgaris was 1. 475μg/L. For the water solubility of 2,2',4,4',5,5'-hexabromodiphenyl ether is extremely low( 1 μg/L),it could not cause the acute poisoning death of C. vulgaris. According to the grading standards for the assessment of the toxicity on algae,2,2',4,4',5,5'-hexabromodiphenyl ether was extremely highly toxic to C. vulgaris. [Conclusions]The extremely high toxicity of 2,2',4,4',5,5'-hexabromodiphenyl ether to C. vulgaris shows that it has heavy potential harm to aquatic ecosystems and the maximum residue limit standards of 2,2',4,4',5,5'-hexabromodiphenyl ether in water should be formulated to better protect aquatic ecosystems.展开更多
Germiantion of Brassica chinensis L. grown in the solution with different concentrations of lead, cadmium and chromium (single and combinative) was investigated. Root lengths decreased with the increase of lead, cadmi...Germiantion of Brassica chinensis L. grown in the solution with different concentrations of lead, cadmium and chromium (single and combinative) was investigated. Root lengths decreased with the increase of lead, cadmium and chromium in hydroponic solution. The physiological toxicity order for these three ions was Cr 6+ >Cd 2+ >Pb 2+ . The uptake of Pb by Brassica chinensis was enhanced with Pb addition. The toxicity of Cr and Pb was reduced due to precipitation of Cr 2O 7 2- and Pb 2+ . The toxicity of Cd to plant decreased when Cr 6+ was added.展开更多
文摘为了研制出对水稻移栽田一年生杂草防除效果优良且对水稻安全的除草剂品种,参照农药田间药效试验准则,采用稻田灌水整平后均匀甩施法开展了50%丙炔噁草酮·丁草胺·西草净乳油(EC)防除水稻移栽田杂草试验。试验结果表明,在有效成分推荐用量为600~900 g/hm2时,施药后40 d,50%丙炔噁草酮·丁草胺·西草净EC对一年生禾本科杂草稗草和多年生阔叶杂草野慈姑表现出良好的防除效果,而对一年生莎草科杂草萤蔺的防效一般。在试验过程中发现该除草剂品种900 g a.i/hm2以上的高剂量施用后对生长前期水稻具有轻微药害,但是施药5周后水稻生长恢复正常,对水稻产量没有明显影响。
文摘There is a method for investigating the transformation of resistance gene of carbendazim into Trichoderma harzianum. In order to introduce the resistance to benzimidazole fungicide into bio-control microorganism Trichoderma harzianum was transformed with the resistance gene. In this study, we investigate resistance level and calculate EC 50 (effective concentration of carbendazim that can survive 50% of Trichoderma harzianum in that concentration) and stability of the resistance for the transformant isolate of Trichoderma harzianum. Results show the transformants can growth on the medium containing more than 1 000 μg/ml carbendazim and the resistance is stabled after 10 times transfer on non-selective medium and have EC 50 average about, 1 200 μg/ml.
基金Supported by Central Public-interest Scientific Institution Basal Research FundChinese Academy of Fishery Science (2017HY-ZD0208)China Agricultural Research System-Freshwater Fish (CARS-46)。
文摘[Objectives] This study was conducted to investigate the toxic effects of 2,2',4,4',5,5'-hexabromobiphenyl ether on Chlorella vulgaris and provide basic data for protecting aquatic ecosystems. [Methods] The acute toxicity effects of 2,2',4,4',5,5'-hexabromodiphenyl ether on C. vulgaris was investigated by the semi-static water contacting acute toxicity method. [Results] The 48,72 and 96 h-EC(50) of 2,2',4,4',5,5'-hexabromodiphenyl ether to C. vulgaris were23. 58,18. 71 and 14. 75 μg/L,respectively,and the safe concentration of 2,2',4,4',5,5'-hexabromodiphenyl ether to C. vulgaris was 1. 475μg/L. For the water solubility of 2,2',4,4',5,5'-hexabromodiphenyl ether is extremely low( 1 μg/L),it could not cause the acute poisoning death of C. vulgaris. According to the grading standards for the assessment of the toxicity on algae,2,2',4,4',5,5'-hexabromodiphenyl ether was extremely highly toxic to C. vulgaris. [Conclusions]The extremely high toxicity of 2,2',4,4',5,5'-hexabromodiphenyl ether to C. vulgaris shows that it has heavy potential harm to aquatic ecosystems and the maximum residue limit standards of 2,2',4,4',5,5'-hexabromodiphenyl ether in water should be formulated to better protect aquatic ecosystems.
文摘Germiantion of Brassica chinensis L. grown in the solution with different concentrations of lead, cadmium and chromium (single and combinative) was investigated. Root lengths decreased with the increase of lead, cadmium and chromium in hydroponic solution. The physiological toxicity order for these three ions was Cr 6+ >Cd 2+ >Pb 2+ . The uptake of Pb by Brassica chinensis was enhanced with Pb addition. The toxicity of Cr and Pb was reduced due to precipitation of Cr 2O 7 2- and Pb 2+ . The toxicity of Cd to plant decreased when Cr 6+ was added.
