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学习的异化和回归——建构主义和社会文化论视角 被引量:1
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作者 陈晓芳 《教育理论与实践》 北大核心 2019年第19期55-59,共5页
儿童学习的异化具体表现在“主动性和兴趣缺乏”的学习目的的异化;“无我性和碎片化”的学习内容的异化;“方式选择权和程序安排权丢失”的学习过程的异化三个方面。儿童学习异化的主要原因是对儿童作为社会人的主体性的忽视以及学习价... 儿童学习的异化具体表现在“主动性和兴趣缺乏”的学习目的的异化;“无我性和碎片化”的学习内容的异化;“方式选择权和程序安排权丢失”的学习过程的异化三个方面。儿童学习异化的主要原因是对儿童作为社会人的主体性的忽视以及学习价值取向的偏斜。儿童学习的回归就是要回到“满足需要和促进发展”的学习目的的源价值性;回到“生活和生长”的学习内容的自组织性;回到“任务驱动、路径探寻和知识实景化”的学习过程的自我建构性。 展开更多
关键词 儿童学习 异化 回归 建构主义 社会文化论 源价值性 自我组织 自我建构
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Nutritional Value Evaluation of Saccharum spontaneum L. Germplasm Resources
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作者 Jianle LIU Changjun BAI +3 位作者 Linling YAN Shimeng CHEN Yu ZHANG Hubiao YANG 《Agricultural Science & Technology》 CAS 2014年第11期1981-1986,2002,共7页
The contents of dry matter, crude fat, crude protein, neutral detergent fiber, acid detergent fiber, crude ash, Ca and P in 43 Saccharum spontaneum L.germplasms during the vegetative period were determined. Among them... The contents of dry matter, crude fat, crude protein, neutral detergent fiber, acid detergent fiber, crude ash, Ca and P in 43 Saccharum spontaneum L.germplasms during the vegetative period were determined. Among them, the crude protein, crude fat, neutral detergent fiber, acid detergent fiber, P and Ca contents were treated as the judging indicators. The nutritional value evaluation was carried out with the analytic hierarchy process(AHP). The results showed A49(Guangxi)had the highest nutritional value. Its dry matter, crude protein, crude fat, crude ash,neutral detergent fiber, acid detergent fiber, Ca and P contents were 32.35%,7.20%, 4.06%, 8.07%, 75.81%, 50.72%, 0.23% and 0.16% respectively. While A3(Guangdong) had the lowest nutritional value. Its dry matter, crude protein, crude fat, crude ash, neutral detergent fiber, acid detergent fiber, Ca and P contents were32.24%, 4.62%, 0.51%, 6.38%, 46.40%, 40.02%, 0.15% and 0.09% respectively.The crude protein content differed significantly among different germplasms. A48 had the highest crude protein content(9.11%), and A14 had the lowest crude protein content(3.72%). Based on the evaluation results, the 43 Saccharum spontaneum L.germplasms were divided into 3 groups: high-nutritional value type, moderate-nutritional value type and low-nutritional value type. We hoped to provide a theoretical reference for the application of Saccharum spontaneum L. as a forage grass. 展开更多
关键词 Saccharum spontaneum L. Neutral detergent fiber Nutritional value Evaluation
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Evaluation on Cultivated Land Resource Ecological Service Value in Wuhan Metropolitan Area
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作者 Jinhua TANG Yinghui LI +2 位作者 Gangqiang CHEN Lei YU Sujuan LI 《Agricultural Science & Technology》 CAS 2014年第10期1809-1811,1832,共4页
The land ecosystem service function value contains the gas regulating function value, air purification function value, water conservation value, land conser-vation value, soil nutrient conservation value and maintain ... The land ecosystem service function value contains the gas regulating function value, air purification function value, water conservation value, land conser-vation value, soil nutrient conservation value and maintain biodiversity value. Based on the method of market value and the data of Hubei Statistical yearbook, cultivat-ed land resources of ecosystem service function value is 730 038.69Mil ion in 2007-2009, and 714 774.99 Mil ion in 2010-2012 in Wuhan Metropolitan Area. After three years of development, Wuhan Metropolitan Area of ecological value of cultivated land has increased by about 3.97%. From the point of each composition, the im-portance of gas regulating function of cultivated land resources and water conserva-tion function is the forefront. From the point of spatial distribution, the highest of annual average value of the cultivated land ecological was Huanggang (1.725 bil ion yuan), the lowest was Ezhou (217.868 6 mil ion yuan) in 2010-2012. From the point of space changes, the land ecological value increased only in Qianjiang city, while farmland ecological value in other cities was fal ing The conclusion is of direc-tive significance to the regional land protection policy and the farmland reasonable distribution, for Wuhan Metropolitan Area and other areas. 展开更多
关键词 Wuhan Metropolitan Area Cultivated land resource Ecological service value
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Vegetation Resources and Goat Foraging Behaviour in Rangeland System in Southern of Madagascar
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作者 Arsene Jules Randrianariveloseheno Jean de Neupomuscene Rakotozandriny Roger Daccord 《Journal of Life Sciences》 2014年第11期902-907,共6页
Goat satisfying energy requirements of goat are determined by anatomical body and browse leaves. In High Bassin zone of Mandrare in Southern Madagascar, sampling area of 400 m^2 has been monitored to analysis floristi... Goat satisfying energy requirements of goat are determined by anatomical body and browse leaves. In High Bassin zone of Mandrare in Southern Madagascar, sampling area of 400 m^2 has been monitored to analysis floristic diversity and Shannon-Weaver index and to establish rangeland typology. With one ram, two castrated goats and three ewes, foraging behaviour, bite rate and forage nutritive value were analyzed in native pastureland during six days at two browsing periods. As results, four pastureland groups were classified with dominant shrubs plants Acacia farnesiana, Poupartia caffra, Kigelianthe madagascariensis and Rhigozum madagascariense. Rangelands sites have presented lower heterogeneity with floristic density (236-658 plants per hectare), Shannon-Weaver index (0.28-0.95), maximum diversity (1.04 ± 0.07) with P 〈 0.05. Most of 42 identified fodder plants presented significant difference (P 〈 0.05) and higher nutritive value (35-54% Dry Matter or DM); mineral matter (70-162 g·kg DM^-1); Crude Protein (124-175 g·kg DM^-1); Crude Fibre (203-376 g·kg DM^-1); Neutral Detergent Fiber (388-548 g·kg DM^-1) and gross energy (3617-4464 kcal·kg DM^-1). Acaciafarnesiana rangeland was overgrazed with 4.00 to 9.00 bites·mn^-1. In fact, relationships between phytosociology, nutritional parameters and foraging behaviour have been analyzed to improve with autochthonous plants and to manage rangeland in semi arid environment. 展开更多
关键词 BITE goats FORAGING BEHAVIOUR Madagascar.
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