The effects of different application levels and species of phosphatic fertilizer on Eleocharis dulcis were studied. The results showed that the growth stage of Eleocharis dulcis was not significantly influenced by dif...The effects of different application levels and species of phosphatic fertilizer on Eleocharis dulcis were studied. The results showed that the growth stage of Eleocharis dulcis was not significantly influenced by different levels of phosphatic fertilizer application, with phosphorus level in 195-375 kg/hm^2. With increasing of the phosphorus level, starch and total soluble sugar accumulated, but the yield was not improved significantly. The analysis on the economic benefits showed that the best phosphorus level was 195 kg/hm^2. The growth stage and yield of Eleocharis dulcis were not considerably influenced by different proportions of calcium-magnesia phosphate fertilizer and ammonium dihydrogen phosphate. With increasing of ammonium dihydrogen phosphate, big-fruit rate of Eleocharis dulcis kept growing, but the accumulations of starch and total soluble sugar were decreasing.展开更多
The removal efficiency of Cu and Zn from swine wastewater was evaluated as effected by three variables: the hydraulic retention time (HRT) (24, 48, 72 and 96 hours), two different plant species (Typha domingensis Pers...The removal efficiency of Cu and Zn from swine wastewater was evaluated as effected by three variables: the hydraulic retention time (HRT) (24, 48, 72 and 96 hours), two different plant species (Typha domingensis Pers. and Eleocharis cellulosa) and two different sizes of filter media (5 and 15 mm) using a horizontal sub-surface flow constructed wetland. From the results, a significant difference was observed in the removal efficiency of Cu and Zn with respect to different hydraulic retention times. The best results were obtained in the HRT of 96 hours for Zn where 96% removal of Zn with Typha domingensis Pers. specie with gravel of 15 mm (experimental unit 6) was achieved. For Cu, at 72 hours of HRT, the efficiency was nearly 100% in five of the six study units (1, 2, 3, 5 and 6). In contrast, in experimental unit 4 with gravel of 15 mm and without plants, only 86% Cu removal was achieved.展开更多
Water chestnut(Eleocharis dulcis) is widely cultivated in many countries for its edible and starchy corms. In this study, starches were separated from Guangxi biqi, Hubei biqi and Anhui biqi, and the morphological and...Water chestnut(Eleocharis dulcis) is widely cultivated in many countries for its edible and starchy corms. In this study, starches were separated from Guangxi biqi, Hubei biqi and Anhui biqi, and the morphological and physicochemical characteristics of the starches were systematically investigated. There were significant differences in granule size, total starch and amylose contents among starches from the three water chestnuts which present similar X-ray diffraction patterns and Fourier transform infrared spectroscopy. The starch of Guangxi biqi exhibited higher swelling power and solubility than that of Hubei biqi and Anhui biqi. Thermal and pasting properties of starch were different among the three water chestnuts. When hydrolyzed by porcine pancreatic α-amylase(PPA), starches from Hubei biqi and Anhui biqi had higher hydrolysis degree. The starches from the three water chestnut varieties differed significantly in morphological and physicochemical properties, and these studies may provide useful information for future exploitation and application of water chestnut starch in food and non-food industries.展开更多
基金Supported by Key Projects in Hubei Science&Technology Pillar Program in 2015(2015BBA199)Guangxi Agricultural Department Science Research ProgramHubei Agricultural S&T Innovation(2016-620-007-001)
文摘The effects of different application levels and species of phosphatic fertilizer on Eleocharis dulcis were studied. The results showed that the growth stage of Eleocharis dulcis was not significantly influenced by different levels of phosphatic fertilizer application, with phosphorus level in 195-375 kg/hm^2. With increasing of the phosphorus level, starch and total soluble sugar accumulated, but the yield was not improved significantly. The analysis on the economic benefits showed that the best phosphorus level was 195 kg/hm^2. The growth stage and yield of Eleocharis dulcis were not considerably influenced by different proportions of calcium-magnesia phosphate fertilizer and ammonium dihydrogen phosphate. With increasing of ammonium dihydrogen phosphate, big-fruit rate of Eleocharis dulcis kept growing, but the accumulations of starch and total soluble sugar were decreasing.
文摘The removal efficiency of Cu and Zn from swine wastewater was evaluated as effected by three variables: the hydraulic retention time (HRT) (24, 48, 72 and 96 hours), two different plant species (Typha domingensis Pers. and Eleocharis cellulosa) and two different sizes of filter media (5 and 15 mm) using a horizontal sub-surface flow constructed wetland. From the results, a significant difference was observed in the removal efficiency of Cu and Zn with respect to different hydraulic retention times. The best results were obtained in the HRT of 96 hours for Zn where 96% removal of Zn with Typha domingensis Pers. specie with gravel of 15 mm (experimental unit 6) was achieved. For Cu, at 72 hours of HRT, the efficiency was nearly 100% in five of the six study units (1, 2, 3, 5 and 6). In contrast, in experimental unit 4 with gravel of 15 mm and without plants, only 86% Cu removal was achieved.
基金supported by the Modern Agricultural Industry Technology System of Jiangsu(JATS[2018]156)
文摘Water chestnut(Eleocharis dulcis) is widely cultivated in many countries for its edible and starchy corms. In this study, starches were separated from Guangxi biqi, Hubei biqi and Anhui biqi, and the morphological and physicochemical characteristics of the starches were systematically investigated. There were significant differences in granule size, total starch and amylose contents among starches from the three water chestnuts which present similar X-ray diffraction patterns and Fourier transform infrared spectroscopy. The starch of Guangxi biqi exhibited higher swelling power and solubility than that of Hubei biqi and Anhui biqi. Thermal and pasting properties of starch were different among the three water chestnuts. When hydrolyzed by porcine pancreatic α-amylase(PPA), starches from Hubei biqi and Anhui biqi had higher hydrolysis degree. The starches from the three water chestnut varieties differed significantly in morphological and physicochemical properties, and these studies may provide useful information for future exploitation and application of water chestnut starch in food and non-food industries.
