Flowering pattern and seedling establishment of umbrella bamboo （Fargesia murieliae （Gamble） Yi） were studied in its native habitat, Mount Shennongjia in Central China. Here in 1996-2000, over 95% of the bamboo pl...Flowering pattern and seedling establishment of umbrella bamboo （Fargesia murieliae （Gamble） Yi） were studied in its native habitat, Mount Shennongjia in Central China. Here in 1996-2000, over 95% of the bamboo plants simultaneously flowered and died, extending from lower elevations to the higher mountains along the altitude and from southwest to northeast along the mountain settings. Bamboo seedlings emerged after the simultaneous flowering, achieving an average density of 5 460 seedlings·m^-2 in the autumn of the year following the flowering. After a high mortality throughout the first winter, bamboo seedlings remained a stable density in following 2-4 years （1130-1230 seedlings·m^-2）. Seedling density positively related to the coverage of parent bamboo, but negatively to the herb layers.展开更多
[Objective] The aim of this study was to investigate the production performance of three pig cultivars through their fattening performance, carcass traits and meat quality for facilitating its application in practical...[Objective] The aim of this study was to investigate the production performance of three pig cultivars through their fattening performance, carcass traits and meat quality for facilitating its application in practical production. [ Method] Three pig cultivars were selected including Yesong （ F1 hybrid of pure-bred wild boar cross with songliao black sow as female parent） hybrid pigs, D × L × Y pigs from three-way cross and L x Y pigs from two-way cross. The test pigs in early period （before 60 kg） and late period （after 60 kg） were all fed with diets of the same nutritional level by free feeding and drinking water. The pre-test period was 3 d, while the test period was 120 d. Every 30 days, pigs with an empty stomach were weighed on morning, and when fattening to 120 d, five pigs with good growth and development in each cultivar were selected for slaughter to determine carcass traits and meat quality. [ Result] Under the same diets and feeding conditions, average daily gain and weight gain in the whole period of pigs from three-way cross were all significantly higher than those of pigs from two-way cross, and also extremely higher than those of Yesong pigs. There was no difference in dressed carcass percentage, backfat thickness and proportion of hind leg among three hybrid combinations. Lean meat percentage and eye muscle area of pigs from three-way cross and pigs from two-way cross were all significantly higher than those of Yesong pigs. Yesong pigs had relatively darker carnation, but marble vein （P〈0.05） and water loss rate （P〈0. 01 ） of Yesong pigs were relatively fewer than those of pigs from two-way cross and pigs from three-way cross. Shear force of Yesong pigs was significantly higher than that of pigs from two-way cross and pigs from three-way cross, [ Conclusion] Yesong hybrid pigs make full use of heterosis between wild pigs and Songliao black pigs for improvement of its meat quality, but some values of major economic traits in Yesong hybrid pigs is still lower than those in pigs from thrae-way cross and pigs from two-way cress.展开更多
In the Shennongjia National Nature Reserve of Central China, the vegetative growth behavior of henon bamboo （Phyllostachys nigra var. henonis （Mitford） Stapf. ex Rendle） was studied from shoot recruitment to culm ...In the Shennongjia National Nature Reserve of Central China, the vegetative growth behavior of henon bamboo （Phyllostachys nigra var. henonis （Mitford） Stapf. ex Rendle） was studied from shoot recruitment to culm establishment. In May, bamboo shoots emerg- ing from the ground achieved an average density of 2.7 shoots m^-2 during the sprouting phase of 16 days. However, about 32% of the new shoots died back before maturity. Insect damage, withering death and rodent predation were responsible for 57%, 29 % and 14% of the total shoot mortality, respectively. From May to June, the shoots attained 400 ± 23 cm during the height growth phase of 34 days, with a daily rate varying from 1 to 56 cm. All branches and leaves unfolded during the branch spreading phase from June to August. Shoot production was positively related to the density of standing culms, but negatively to both coverage and height of herb layers.展开更多
The industrial convergence has developed rapidly,which benefit promoting the innovation of traditional industry and optimizing the industrial structure.The integration of agriculture and tourism can promote the develo...The industrial convergence has developed rapidly,which benefit promoting the innovation of traditional industry and optimizing the industrial structure.The integration of agriculture and tourism can promote the development of agricultural economy and tourism economy.Based on the industrial convergence theory,this paper explains the necessity of convergence of leisure agriculture and rural tourism,and studies on the status quo of the development of tourism resources in Henan.Finally,it put forward the development strategies:(1)more support from the government is in need on policy,finance and using rural area;(2)the rural planning needs to be strengthened;(3)the agricultural resources needs to be integrated;(4)the incentive system needs to be built to attract talent.展开更多
基金This research was financed by the National Natural Science Foundation (No. 30470284) and the Center for Development Research of the University of Bonn (P. 52015).
文摘Flowering pattern and seedling establishment of umbrella bamboo （Fargesia murieliae （Gamble） Yi） were studied in its native habitat, Mount Shennongjia in Central China. Here in 1996-2000, over 95% of the bamboo plants simultaneously flowered and died, extending from lower elevations to the higher mountains along the altitude and from southwest to northeast along the mountain settings. Bamboo seedlings emerged after the simultaneous flowering, achieving an average density of 5 460 seedlings·m^-2 in the autumn of the year following the flowering. After a high mortality throughout the first winter, bamboo seedlings remained a stable density in following 2-4 years （1130-1230 seedlings·m^-2）. Seedling density positively related to the coverage of parent bamboo, but negatively to the herb layers.
基金funded by National key Technology R & D Program (2008BADB2B02)
文摘[Objective] The aim of this study was to investigate the production performance of three pig cultivars through their fattening performance, carcass traits and meat quality for facilitating its application in practical production. [ Method] Three pig cultivars were selected including Yesong （ F1 hybrid of pure-bred wild boar cross with songliao black sow as female parent） hybrid pigs, D × L × Y pigs from three-way cross and L x Y pigs from two-way cross. The test pigs in early period （before 60 kg） and late period （after 60 kg） were all fed with diets of the same nutritional level by free feeding and drinking water. The pre-test period was 3 d, while the test period was 120 d. Every 30 days, pigs with an empty stomach were weighed on morning, and when fattening to 120 d, five pigs with good growth and development in each cultivar were selected for slaughter to determine carcass traits and meat quality. [ Result] Under the same diets and feeding conditions, average daily gain and weight gain in the whole period of pigs from three-way cross were all significantly higher than those of pigs from two-way cross, and also extremely higher than those of Yesong pigs. There was no difference in dressed carcass percentage, backfat thickness and proportion of hind leg among three hybrid combinations. Lean meat percentage and eye muscle area of pigs from three-way cross and pigs from two-way cross were all significantly higher than those of Yesong pigs. Yesong pigs had relatively darker carnation, but marble vein （P〈0.05） and water loss rate （P〈0. 01 ） of Yesong pigs were relatively fewer than those of pigs from two-way cross and pigs from three-way cross. Shear force of Yesong pigs was significantly higher than that of pigs from two-way cross and pigs from three-way cross, [ Conclusion] Yesong hybrid pigs make full use of heterosis between wild pigs and Songliao black pigs for improvement of its meat quality, but some values of major economic traits in Yesong hybrid pigs is still lower than those in pigs from thrae-way cross and pigs from two-way cress.
基金This research was financed by the Center for Development Research （ZEF） of the University of Bonn, Germany （P. 52015l, the National Natural Science Foundation of China （No. 30470284l and the Scientific Research Foundation for the Returned 0verseas Chinese Scholars （No. 2004-527）.
文摘In the Shennongjia National Nature Reserve of Central China, the vegetative growth behavior of henon bamboo （Phyllostachys nigra var. henonis （Mitford） Stapf. ex Rendle） was studied from shoot recruitment to culm establishment. In May, bamboo shoots emerg- ing from the ground achieved an average density of 2.7 shoots m^-2 during the sprouting phase of 16 days. However, about 32% of the new shoots died back before maturity. Insect damage, withering death and rodent predation were responsible for 57%, 29 % and 14% of the total shoot mortality, respectively. From May to June, the shoots attained 400 ± 23 cm during the height growth phase of 34 days, with a daily rate varying from 1 to 56 cm. All branches and leaves unfolded during the branch spreading phase from June to August. Shoot production was positively related to the density of standing culms, but negatively to both coverage and height of herb layers.
文摘The industrial convergence has developed rapidly,which benefit promoting the innovation of traditional industry and optimizing the industrial structure.The integration of agriculture and tourism can promote the development of agricultural economy and tourism economy.Based on the industrial convergence theory,this paper explains the necessity of convergence of leisure agriculture and rural tourism,and studies on the status quo of the development of tourism resources in Henan.Finally,it put forward the development strategies:(1)more support from the government is in need on policy,finance and using rural area;(2)the rural planning needs to be strengthened;(3)the agricultural resources needs to be integrated;(4)the incentive system needs to be built to attract talent.
