关键词
第五节 养殖
作者: 暂无 年份: 2017 文献类型 : 地方志
描述: 第五节 养殖
草田轮作在黄土高原丘陵沟壑区旱作农业中的作用研究
作者: 曹利民   来源: 兰州大学 年份: 2010 文献类型 : 学位论文 关键词: 可持续发展   草田轮作   循环农业模式  
描述: duction in the area is restricted by disadvantageous natural resources and environmental conditions, including low arable land area per capita, frequent drought events and a landscape dominated by mountains. Forage crop rotation systems could improve soil fertility, increase crop外eld and provide quality forage supplies for livestock production. Additionally, their adoption is considered a suitable means to advance sustainable agriculture development. In this study, the role and status of forage crop rotations in Tianshui city were studied.
全文:、水土保持为主和草畜结合为主的三种草田轮作模式及其适宜分布区域。 (4)依据循环农业的基本原理,建议建立“草田轮作+畜牧养殖+可再生能源+高效农业”的生态能源型良性循环体系,通过技术整合与集成,构建可持续发展和循环农业生产体系,实现生态-经济协调发展、农牧有机结合的可持续发展模式。
《中国古代农业科技史简明图表》出版
作者: 暂无 来源: 农业考古 年份: 2016 文献类型 : 期刊 关键词: 农书   科技史   中国古代农业   陈文华  
描述: 农业出版社最近出版了陈文华同志编绘的《中国古代农业科技史简明图表》。本书采用图、表结合的方式按历代人口、耕地、产量、主要粮食作物,耕作制度、耕作工具以及水利、肥料、畜牧、蚕桑、园艺和重要农书等十四
黄土高原北部农牧交错带庭院集雨提高水分转化效率技术途径的研究
作者: 马治国   来源: 中国农业大学 年份: 2005 文献类型 : 学位论文 关键词: 提高水分转化效率   黄土高原农牧交错带   集雨补灌   庭院经济  
描述: 本研究以内蒙古准格尔旗为例,研究了在半干旱气候条件下,建设集雨补灌农业.发展高效节水庭院经济的途径和对策。本区位于黄土高原北部农牧交错带,自然环境恶劣,水土流失严重,土壤生产力低下,由于过度开垦和放牧,植被破坏严重,生态恶化,急需治理。在此条件下,发展生态节水型庭院经济,可缓解生态压力,对于促进区域
全文:和放牧,植被破坏严重,生态恶化,急需治理。在此条件下,发展生态节水型庭院经济,可缓解生态压力,对于促进区域经济的发展具有重要意义。主要研究结果如下: (1) 在试验区,大力建设集雨设施是发展庭院经济的基础
陕西省农业现代化对农民增收的关系研究
作者: 雷婷   来源: 西北农林科技大学 年份: 2010 文献类型 : 学位论文 关键词: 陕西省   农民增收   农业现代化  
描述: e’ stability.This paper sets Shaanxi province as an example,hope to find the main factors affecting the income of peasants and their contribution in the system of the agricultural modernization, so as to identify the means of raising income of farmers from the view of the agricultural technology.
全文:模型,进行参数估计,得出陕西省农业现代化系统对农民增收的贡献率为8%,其中投入水平、产出水平的贡献率分别为33%和18%,而生产条件水平对农民增收的贡献率为-4%。各因素系数之和为0.4小于1,说明陕西
裕固族经济史
作者: 任正实   来源: 中央民族大学 年份: 2012 文献类型 : 学位论文 关键词: 裕固族   游牧经济   经济史  
描述: 裕固族的祖先可以追溯到唐朝时期的回鹘汗国,由此又可追溯到公元前3世纪的丁零。研究裕固族经济史,丁零、高车、铁勒、回鹘经济研究是不可少的环节。从丁零到回纥汗国的建立,裕固族的祖先们经历了从原始氏族社会到家长奴隶制社会再到封建制社会的转变,但游牧经济一直是社会经济的主体部分。回鹘汗国内部实行封建性的赋税
全文:建立了政权,成为河西地区的重要势力。河西回鹘在从事畜牧业同时,受到农耕文化影响,农业技术和农业产品更加丰富。河西回鹘地处“丝绸之路”,这促进了河西地区商业贸易和手工业的迅速发展,对回鹘经济产生了极大
历史时期青海地区自然灾害与区域社会经济发展研究
作者: 刘雯   来源: 西北农林科技大学 年份: 2009 文献类型 : 学位论文 关键词: 青海地区   自然灾害   历史时期   社会效应  
描述: e distinctive features in Western and Eastern of Qinghai's natural disaster in history which based on the historical materials and studied the Interaction Relationship Between the natural disasters and social-economic development, we used the theory and analysis method from the research area of disaster history and agricultural history, try to have a comprehensive investigation between the natural disasters and social-economic development in the history of Qinghai. Firstly, we divided Qinghai into two parts: the eastern and the western, under the study of the geographical features of Qinghai. We summarized the natural disaster of the eastern part mainly as flood, drought, hailstone and frost with distinctive features of variety, continuity and growth accompany while the western is mainly as earthquake and snow disaster with distinctive features of unexpected and severity. Secondly , as the great influence on agriculture and the resulting changement in agriculture is most profound, so the progress in agriculture sciences is related to withstand the natural disaster in some ways. The paper discussed the natural disasters affected Qinghai's agriculture in history, from the aspect of seed selection 、 production 、 processing and storage to invest the development of mitigation techniques in this area. And for the livestock we investigated in two sides bred of livestock and prevention of livestock, furthermore we invested the mitigation techniques which full of geographical characteristics. Thirdly, the article investigated the relationship between natural disasters and the economic fluctuation in Qinghai from the perspective of the change in population and grain price. And then, we analyzed the influence on regional industrial structure from the aspect of expansion in rural areas, the relationship between agriculture and animal husbandry, disaster-relief crop introduction and the structure of animal species. In the view of pastoral economic exchange, we studied the interaction relationship between the natural disasters and economic development. Finally, we studied the interaction relationship between the natural disasters and social development in Qinghai. What is more, we analyzed the policy which includes grain storage, relieved and help the people in disaster , reduced taxes to control the disaster in history. We wish these could be helpful to the prevention and control of natural disasters in Qinghai today.
全文:很大程度上与抵御自然灾害相联系。文章探讨了历史时期青海地区的农业灾害情况,从选种、生产、加工、储藏的角度对该地区种植业减灾技术的发展进行了考察,对畜牧业则从畜种选育和畜疫防治的角度进行了分析,此外还
元代农业灾害研究
作者: 龚光明   来源: 南京农业大学 年份: 2007 文献类型 : 学位论文 关键词: 赈济   元代   防治   农业灾害  
描述: 元代农业灾害频繁,几乎各种灾害都发生过。农业气象灾害、生物灾害、环境灾害三大灾种差异大,各灾种内也极不平衡;它们又有共性,发生频率高,多大灾、连灾及群灾。灾害众多既有客观原因,亦有人为因素,尤其是大规模的屯田和砍伐森林造成地表植被的严重破坏,与农业灾害频繁有密切联系;此外,元代的围湖造田、赋税苛重、
全文:”思想是一个逐步发展的过程,经历了“完全的游牧经济”到“初步认识到农耕经济的重要意义”,再到“重视农耕经济”的发展过程。其间制定许多发展农业、限制畜牧业的法令;极为重视农桑,除政府颁布《农桑辑要》外
西北旱作农区农作制优先序研究
作者: 成敏   来源: 西北农林科技大学 年份: 2010 文献类型 : 学位论文 关键词: 西北旱作农区   BP神经网络   农作制优先序   抗旱减灾对策?  
描述: est region, which c ombined with the water-saving, agricultural soil and water conservation techniques, and then taken " drought resistance, reduce erosion, increase efficiency" as a principle.
全文:了以资源节约高效利用、抗旱减灾为主的农作制以及合理有效的抗旱减灾对策。主要得出以下结论: (1)通过在甘肃天水、定西、平凉、庆阳地区,宁夏银南地区、固原地区,陕西宝鸡、咸阳、渭南、铜川、延安、榆林
隋唐时期青海草原战争与生态环境研究
作者: 来霞霞   来源: 陕西师范大学 年份: 2010 文献类型 : 学位论文 关键词: 生态环境   吐谷浑   吐蕃   青海草原  
描述: t Territories distributed a few mature Minority forces,for example: TuYuhun, Tibet, Party items.
全文:,畜牧条件差,草原的承载力也比较低。战争的迭起,使草原生产力遭到破坏,不同程度地对这里的生态环境产生了消极的影响。这些破坏性的影响日积月累,加上在青海草原农业垦殖的迅速发展,使这一地区草原承载压力加大
< 1 2
Rss订阅