Little is known about the impact of direct sowing under vegetation cover on the production and quality of New Rice for Africa （NERICA） on poor oxisol. In this study, two NERICA varieties （NERICA 3 and NERICA 8） w...Little is known about the impact of direct sowing under vegetation cover on the production and quality of New Rice for Africa （NERICA） on poor oxisol. In this study, two NERICA varieties （NERICA 3 and NERICA 8） were grown under tropical oxisol soil with very low nutrient contents. Four cultivation systems were used in completely randomized block design, including plowing （control）, unplowed soil with dead vegetation cover （DVC）, unplowed soil with live vegetation cover （LVC） and unplowed soil with mixed vegetation cover （MVC）. DVC significantly improved the exponential growth of NERICAs. NERICA 3 was the more productive （2.16–3.05 t/hm2） compared with NERICA 8 （0.71–1.21 t/hm2）. Cultivation systems improved the nutritional quality of NERICAs. The total protein content of NERICA 3 under DVC and MVC was 84.8% and 75.0% higher than control, respectively. The total soluble carbohydrate contents of NERICA 8 under LVC and MVC was 73.2% and 57.3% higher than control, respectively. These results suggested that conservative approach like direct sowing on unplowed soil with vegetation cover systems can improve the nutritional quality of rainfed NERICAs and their sustainable production under poor oxisol soil in sub-Saharan Africa.展开更多
On December 31 st,Gansu Yinguang ChemicalIndustry Group Co.,Ltd.(Yinguang Chemical),a subsidiary of China North Industries GroupCorporation (CNIGC),announced that its thirdphase of 100 000 t/a TDI (toluene diisocyanat...On December 31 st,Gansu Yinguang ChemicalIndustry Group Co.,Ltd.(Yinguang Chemical),a subsidiary of China North Industries GroupCorporation (CNIGC),announced that its thirdphase of 100 000 t/a TDI (toluene diisocyanate)expansion project has been put into operationin mid December 2009.Yinguang Chemical completed constructionon the second phase project in 2006 and ex-展开更多
基金the Laboratory of Biotechnology and Environment as well as the Food and Nutrition Research Center(CRAN)of Institute for Medical Research and Study of Medicinal Plants in Cameroon for their support
文摘Little is known about the impact of direct sowing under vegetation cover on the production and quality of New Rice for Africa （NERICA） on poor oxisol. In this study, two NERICA varieties （NERICA 3 and NERICA 8） were grown under tropical oxisol soil with very low nutrient contents. Four cultivation systems were used in completely randomized block design, including plowing （control）, unplowed soil with dead vegetation cover （DVC）, unplowed soil with live vegetation cover （LVC） and unplowed soil with mixed vegetation cover （MVC）. DVC significantly improved the exponential growth of NERICAs. NERICA 3 was the more productive （2.16–3.05 t/hm2） compared with NERICA 8 （0.71–1.21 t/hm2）. Cultivation systems improved the nutritional quality of NERICAs. The total protein content of NERICA 3 under DVC and MVC was 84.8% and 75.0% higher than control, respectively. The total soluble carbohydrate contents of NERICA 8 under LVC and MVC was 73.2% and 57.3% higher than control, respectively. These results suggested that conservative approach like direct sowing on unplowed soil with vegetation cover systems can improve the nutritional quality of rainfed NERICAs and their sustainable production under poor oxisol soil in sub-Saharan Africa.
文摘Yunnan Coal Chemical Industry Group Co.,Ltd.(YCCIG)started up a 150 000 t/a dimethylether(DME)project in Kaiyuan,Yunnan province on January 6th,2009.
文摘On December 31 st,Gansu Yinguang ChemicalIndustry Group Co.,Ltd.(Yinguang Chemical),a subsidiary of China North Industries GroupCorporation (CNIGC),announced that its thirdphase of 100 000 t/a TDI (toluene diisocyanate)expansion project has been put into operationin mid December 2009.Yinguang Chemical completed constructionon the second phase project in 2006 and ex-
