Effects of the extracts from selected bamboos on the growth and the activities of the digestive enzyme and arbaxylesterase of Helicoverpa armigera larvae were reported in this paper. The results showed that the extrac...Effects of the extracts from selected bamboos on the growth and the activities of the digestive enzyme and arbaxylesterase of Helicoverpa armigera larvae were reported in this paper. The results showed that the extracts from Pleioblastus juxianensis, Bambusa multiplex, Brachystachyum albostriatum show strong growth disrupting effects on tested pest. The activities of the digestive enzyme in the larvae of Helicoverpa armigera fed with extract of Pleioblastus juxianensis, Bambusa multiplex, Brachystachyum albostriatum were higher than the control treatment, Thereinto, the activity of protease changed largest, that of amylase larger, and the activity of lipase changed a little. The activity of arbaxylesterase in the larvae fed with extract of Pleioblastus juxianensis, Bambusa multiplex, Brachystachyum albostriatum was inhibited, the relative enzyme activities after 3 days of which were 0.626、0.637、0.602 folds compared to CK, respectively. The effect on the enzymes in Helicoverpa armigera larvae was reduced with the treatment time.展开更多
The influence of Bacillus probiotics on the digestive enzyme activity and the growth of Litopenaeus vannamei were de- termined in this study. The shrimp was treated with five percentages (1.5, 3.0, 4.5, 6.0 and 7.5) o...The influence of Bacillus probiotics on the digestive enzyme activity and the growth of Litopenaeus vannamei were de- termined in this study. The shrimp was treated with five percentages (1.5, 3.0, 4.5, 6.0 and 7.5) of probiotics (Bacillus spp.) supple- mented to the feed and cultured for 45 d. The growth measured as the weight gain at the end of culturing was significantly (P<0.05) higher in probiotic-treated shrimps than that of the control (without receiving probiotics). Activities of protease and amylase, two digestive enzymes of the midgut gland and the intestine were significantly (P<0.05) higher in probiotic-treated shrimp than in the control.展开更多
文摘Effects of the extracts from selected bamboos on the growth and the activities of the digestive enzyme and arbaxylesterase of Helicoverpa armigera larvae were reported in this paper. The results showed that the extracts from Pleioblastus juxianensis, Bambusa multiplex, Brachystachyum albostriatum show strong growth disrupting effects on tested pest. The activities of the digestive enzyme in the larvae of Helicoverpa armigera fed with extract of Pleioblastus juxianensis, Bambusa multiplex, Brachystachyum albostriatum were higher than the control treatment, Thereinto, the activity of protease changed largest, that of amylase larger, and the activity of lipase changed a little. The activity of arbaxylesterase in the larvae fed with extract of Pleioblastus juxianensis, Bambusa multiplex, Brachystachyum albostriatum was inhibited, the relative enzyme activities after 3 days of which were 0.626、0.637、0.602 folds compared to CK, respectively. The effect on the enzymes in Helicoverpa armigera larvae was reduced with the treatment time.
文摘The influence of Bacillus probiotics on the digestive enzyme activity and the growth of Litopenaeus vannamei were de- termined in this study. The shrimp was treated with five percentages (1.5, 3.0, 4.5, 6.0 and 7.5) of probiotics (Bacillus spp.) supple- mented to the feed and cultured for 45 d. The growth measured as the weight gain at the end of culturing was significantly (P<0.05) higher in probiotic-treated shrimps than that of the control (without receiving probiotics). Activities of protease and amylase, two digestive enzymes of the midgut gland and the intestine were significantly (P<0.05) higher in probiotic-treated shrimp than in the control.
