F1 heterosis of agronomic characters and chemical components of 8 fluecured tobacco varieties and 6 self-bred high-potassium new lines was studied. The results showed that 4-5 weeks after transplanting was the main ch...F1 heterosis of agronomic characters and chemical components of 8 fluecured tobacco varieties and 6 self-bred high-potassium new lines was studied. The results showed that 4-5 weeks after transplanting was the main changing period of agronomic traits. Compared with the comparative heterosis, among the proportions of combinations showing positive comparative heterosis at the significant level, the heterosis proportions of plant height （97.92%）, internode length （100%） and stem girth （58.33%） were larger, these of total nitrogen （83.33%）, protein （79.17%）, nicotine （79.17%） and potassium （95.83%） in upper leaves were larger, these of total sugar （64.58%）, total nitrogen （68.75%）, protein （72.92%） and nicotine （64.58%） in middle leaves were larger, and in lower leaves, except that the proportion of chlorine was smaller （12.50%）, the proportions of other chemical components all exceeded 40%. Compared with average heterosis, among the proportions of combinations showing positive comparative heterosis at the significant level, the heterosis proportions of plant height （54.17%）, leaf width （43.75%）, stem girth （43.75%） and internode length （72.92%） were larger, these of total sugar （47.92%） and reducing sugar （54.17%） in upper leaves were larger, these of all the chemical components in middle leaves exceeded 30%, and these of all the chemical components in lower leaves were in the range of 27.08%-41.67%. Compared with heterobeltiosis, among the proportions of combinations showing positive comparative heterosis at the significant level, that of the internode length （60.42%） was larger, these of chemical components in upper leaves were in the range of 8.33%-29.17%, these of chemical components in middle leaves were in the range of 20.83%-39.58%, and these of chemical components in lower leaves were in the range of 16.67%-35.42%. It was indicated that rational effective control of water and fertilizer in this sensitive period could significantly enhance heterosis.展开更多
The parasitic weed Striga poses a serious threat to cereal production in sub-Saharan Africa. For many years, technological packages for the control of this weed were proposed and implemented on farmers＇ fields. A sur...The parasitic weed Striga poses a serious threat to cereal production in sub-Saharan Africa. For many years, technological packages for the control of this weed were proposed and implemented on farmers＇ fields. A survey was carried out in farmers＇ fields in 2010/201l cropping season in selected dryland areas of Tanzania to： （a） determine the Striga plant counts, number of capsules/Striga plant and agronomic practices used by farmers to control Striga; and （b） evaluate the relationship between Striga reproduction, soil chemical characteristics and agronomic practices. Soil samples at 0-20 cm depth were collected from 20 different farmers＇ fields. The soil samples were analyzed for pH, organic carbon, N, P and K. Results showed that there was low adoption of recommended Striga control methods. Regression analysis of agronomic practices and soil chemical characteristics revealed a positive improvement of soil N and organic carbon and reduction of soil P and K content as one shifted from sole planting to intercropping. The results showed that potassium was highly positively related to number of capsules/Striga plant. There was a reduction in the number of capsules/plant as one moved from sole planting to intercropping. Based on these findings, K in the Striga infested in soils positively influenced Striga reproduction and seed bank replenishment, hence high soil K levels may lead to high Striga incidence.展开更多
Thirteen diverse anthocyanin pigmented wheat genotypes originating from different countries were investigated for agronomic and chemical traits. The results showed significant variation among wheat genotypes in yield ...Thirteen diverse anthocyanin pigmented wheat genotypes originating from different countries were investigated for agronomic and chemical traits. The results showed significant variation among wheat genotypes in yield and grain physical characteristics, Released cultivars were superior in grain yield, but other genetic resources exceeded the cultivars in regard to test weight, grain mass, or seed plumpness. In case of phytochemical content both genotypic and environmental effects were important for the observed variations. The total phenolic content varied from 120 to 177 mg ferulic acid equivalent per 100 g dry weight; total anthocyanin content from 3.4 to 75.2 ppm cyanidin glucoside equivalent; yellow pigment content from 2.6 and 7.6 ppm beta-carotene equivalent; protein content from 11.3 to 19.1%. The study demonstrated that Ethiopian wheats are a source of high levels of anthocyanins and protein content.展开更多
Yulin was belong to ＂Hundred Yue＂ in ancient time, the Zhuang and Yao nationality was the indigenous people here. After the Qin and Han Dynasties, the central plains people constantly migrating to the south not only...Yulin was belong to ＂Hundred Yue＂ in ancient time, the Zhuang and Yao nationality was the indigenous people here. After the Qin and Han Dynasties, the central plains people constantly migrating to the south not only brought the advanced agricultural technology, but also a lot of Hafts customs and folk music, including the ＂picking flower lanterns＂, ＂tea-picking drama＂ and other folk music cultures which combined with the local pristine ＂tea plucking＂ folk songs, and then the ＂tea plucking＂ music culture began to have its own unique artistic features. These characteristics contributed to highlight the beauty of Yulin tea plucking opera. This article mainly discusses Yulin tea-picking Drama＇s rich aesthetic connotation through elaborating its music, lyrics, the theme, dancing, and clothing etc.展开更多
基金Supported by Key Project of China Tobacco Corporation in 2014(110201402003)~~
文摘F1 heterosis of agronomic characters and chemical components of 8 fluecured tobacco varieties and 6 self-bred high-potassium new lines was studied. The results showed that 4-5 weeks after transplanting was the main changing period of agronomic traits. Compared with the comparative heterosis, among the proportions of combinations showing positive comparative heterosis at the significant level, the heterosis proportions of plant height （97.92%）, internode length （100%） and stem girth （58.33%） were larger, these of total nitrogen （83.33%）, protein （79.17%）, nicotine （79.17%） and potassium （95.83%） in upper leaves were larger, these of total sugar （64.58%）, total nitrogen （68.75%）, protein （72.92%） and nicotine （64.58%） in middle leaves were larger, and in lower leaves, except that the proportion of chlorine was smaller （12.50%）, the proportions of other chemical components all exceeded 40%. Compared with average heterosis, among the proportions of combinations showing positive comparative heterosis at the significant level, the heterosis proportions of plant height （54.17%）, leaf width （43.75%）, stem girth （43.75%） and internode length （72.92%） were larger, these of total sugar （47.92%） and reducing sugar （54.17%） in upper leaves were larger, these of all the chemical components in middle leaves exceeded 30%, and these of all the chemical components in lower leaves were in the range of 27.08%-41.67%. Compared with heterobeltiosis, among the proportions of combinations showing positive comparative heterosis at the significant level, that of the internode length （60.42%） was larger, these of chemical components in upper leaves were in the range of 8.33%-29.17%, these of chemical components in middle leaves were in the range of 20.83%-39.58%, and these of chemical components in lower leaves were in the range of 16.67%-35.42%. It was indicated that rational effective control of water and fertilizer in this sensitive period could significantly enhance heterosis.
文摘The parasitic weed Striga poses a serious threat to cereal production in sub-Saharan Africa. For many years, technological packages for the control of this weed were proposed and implemented on farmers＇ fields. A survey was carried out in farmers＇ fields in 2010/201l cropping season in selected dryland areas of Tanzania to： （a） determine the Striga plant counts, number of capsules/Striga plant and agronomic practices used by farmers to control Striga; and （b） evaluate the relationship between Striga reproduction, soil chemical characteristics and agronomic practices. Soil samples at 0-20 cm depth were collected from 20 different farmers＇ fields. The soil samples were analyzed for pH, organic carbon, N, P and K. Results showed that there was low adoption of recommended Striga control methods. Regression analysis of agronomic practices and soil chemical characteristics revealed a positive improvement of soil N and organic carbon and reduction of soil P and K content as one shifted from sole planting to intercropping. The results showed that potassium was highly positively related to number of capsules/Striga plant. There was a reduction in the number of capsules/plant as one moved from sole planting to intercropping. Based on these findings, K in the Striga infested in soils positively influenced Striga reproduction and seed bank replenishment, hence high soil K levels may lead to high Striga incidence.
文摘Thirteen diverse anthocyanin pigmented wheat genotypes originating from different countries were investigated for agronomic and chemical traits. The results showed significant variation among wheat genotypes in yield and grain physical characteristics, Released cultivars were superior in grain yield, but other genetic resources exceeded the cultivars in regard to test weight, grain mass, or seed plumpness. In case of phytochemical content both genotypic and environmental effects were important for the observed variations. The total phenolic content varied from 120 to 177 mg ferulic acid equivalent per 100 g dry weight; total anthocyanin content from 3.4 to 75.2 ppm cyanidin glucoside equivalent; yellow pigment content from 2.6 and 7.6 ppm beta-carotene equivalent; protein content from 11.3 to 19.1%. The study demonstrated that Ethiopian wheats are a source of high levels of anthocyanins and protein content.
文摘Yulin was belong to ＂Hundred Yue＂ in ancient time, the Zhuang and Yao nationality was the indigenous people here. After the Qin and Han Dynasties, the central plains people constantly migrating to the south not only brought the advanced agricultural technology, but also a lot of Hafts customs and folk music, including the ＂picking flower lanterns＂, ＂tea-picking drama＂ and other folk music cultures which combined with the local pristine ＂tea plucking＂ folk songs, and then the ＂tea plucking＂ music culture began to have its own unique artistic features. These characteristics contributed to highlight the beauty of Yulin tea plucking opera. This article mainly discusses Yulin tea-picking Drama＇s rich aesthetic connotation through elaborating its music, lyrics, the theme, dancing, and clothing etc.
