陇东一熟制地区糯玉米复种高原夏菜一年两熟栽培技术

作者： 周广业   来源： 农业开发与装备 年份： 2016 文献类型 ： 期刊 关键词： 陇东   糯玉米   复种   高原夏菜   一年两熟  

描述： 在一年一熟的甘肃东部泾、芮河流域的河谷地区,传统的粮菜轮作模式是冬小麦收获后复种高原夏菜,土地利用率比较低。试验鲜食糯玉米收获后复种秋芹、胡萝卜、白萝卜、大白菜等高原夏菜,可以变一年一熟为一年两熟,667m2产值可以达到8000-10000元,土地利用率显著提高。

中国北方地区节水农作制度研究

作者： 王婧   来源： 沈阳农业大学 年份： 2009 文献类型 ： 学位论文 关键词： 北方地区   节水   节水技术   节水农作制度   种植模式  

描述： ium between the grain production and water resource: the drought and the irrigation area in northeast china, the drought and the irrigation region in Huanghuaihai area, the drought and the irrigation area in northwest china.The article analized the characteristic of water using of the main crops and the main cropping systems, compared the economic benefit of the water-saving planting patterns, studied the economic benefit, the water-saving benefit and participatory farmers survey results etc. of the water-saving technologies.

全文：耗水作物,夏棉花、夏玉米与春棉花耗水量与降水量的耦合率好于冬小麦,应适当“压麦扩棉”、“压粮-粮扩粮-经”,以一年两熟为主,适当改小麦-玉米一年两熟为小麦-玉米→春棉花→小麦-玉米三年五熟制;缺水灌区

河西走廊两粮一肥种植模式的研究

作者： 包兴国   刘生战   舒秋萍   来源： 中国土壤与肥料 年份： 2016 文献类型 ： 期刊 关键词： 吨粮田   种植模式   粮肥间套作  

描述： 对小麦/玉米间作套种绿肥两粮一肥种植模式的研究表明,以小麦/玉米150 cm带幅、玉米1行麦带套种绿肥饲草的种植模式较优,平均粮食产量可达13377.0~14731.5 kg/hm2;收获绿肥鲜草

陕北丘陵沟壑区西瓜套种向日葵栽培技术

作者： 杜社妮   白岗栓   边利军   来源： 北方园艺 年份： 2016 文献类型 ： 期刊 关键词： 向日葵   起垄   西瓜   套种   黄土丘陵区  

描述： 陕北黄土丘陵沟壑区为传统的"一年一熟"区,西瓜套种向日葵技术将"一年一熟"改为"一年两熟",可提高土地产出率。在简要介绍品种选择、选地、起垄的基础上,详细阐述了西瓜、向日葵不同生长阶段的栽培管理技术;提出了西瓜起垄栽培、向日葵适期播种可缩短2种作物的共生期,保证西瓜正常生长及向日葵正常成熟。

不同耕作措施对麦—豆轮作条件下土壤有机碳库的影响

作者： 毕冬梅   来源： 甘肃农业大学 年份： 2009 文献类型 ： 学位论文 关键词： 碳素有效率   耕作措施   碳库管理指数   土壤有机碳库   轮作  

描述： 本文以甘肃农业大学定西旱农综合试验站的长期定位试验为基础,对麦-豆轮作次序下不同耕作措施间的土壤有机碳、易氧化碳、微生物量碳以及水溶性有机碳的含量进行了测定,计算了土壤碳素利用效率和碳库管理指数在

全文：各个序列中变化。 本试验设4个处理,即T:传统耕作;NT:免耕不覆盖;TS:传统耕作结合秸秆还田;NTS:免耕秸秆覆盖。主要研究结论如下: (1)两种轮作次序下,NT和NTS处理下的土壤有机碳含量均高于

儒法斗争与我国耕作制度的发展

作者： 暂无 来源： 北京师范大学学报(自然科学版) 年份： 2016 文献类型 ： 期刊 关键词： 农业历史   赵过   粮食作物生产   轮作复种制   农业史   区田法   古代农业   儒法   农业生产   《齐民要术》  

描述： 。我国耕作制度的发展,大体由原始的撩荒(抛荒)耕作制发展到连种耕作制,后来又进一步发展为两年三熟或一年几熟的轮作复种制。这是我国古代农业的特点。

《天工开物》是研究我国古代农业的科技全书

作者： 宗德生   来源： 农业考古 年份： 2016 文献类型 ： 期刊 关键词： 粮食生产   十七世纪   《天工开物》   李约瑟   世界农业   宋应星   科技史   生产技术   古代农业   水稻产区  

描述： 重要的价值。《天工开物》全面总结了我国古代农业的生产技术。它对于我国古代农业科学技术的总结,是比较全面,比较系统,比较准确的。《天工开物》全书十八卷,开首第一卷《乃粒》,就专门总结和论述粮食生产,分别阐述了稻、麦、黍、稷、粱、麻和菽等主要粮食作物的全部

两汉护羌校尉略考

作者： 谢绍鹢   来源： 人文杂志 年份： 2016 文献类型 ： 期刊 关键词： 级别地位   护羌校尉   军队构成   两汉   职掌  

描述： 两汉时期作为中央王朝为治理羌人设置护羌校尉一职。其职掌的内容为:政治抚绥,巡行理事；监视羌人动向,警备边境,保护交通；兼理屯田。护羌校尉秩别仅为比二千石,但因持节而位尊权重,是主持对羌军务方面长官

两汉屯田制研究

作者： 朱绍侯   来源： 史学月刊 年份： 2016 文献类型 ： 期刊 关键词： 东汉   西汉   屯田制  

描述： 中国的屯田制是从西汉开始的,它由秦朝的更戍制、汉初的"募民实边"和"北假田官"发展、演变而来。西汉只有边区屯田,到东汉才出现内地屯田。汉代军屯与民屯并存。屯田不仅为军队提供粮草供应,还保卫了边区,加强了民族融合,有利于对边疆的开发,也可减轻人民的租税负担。

曹魏两大政治集团论析

作者： 王建明   来源： 山东大学 年份： 2009 文献类型 ： 学位论文 关键词： 曹魏政治集团   汝颍   谯沛  

描述： Group headed by Cao Cao, Shuzhong Group led by Liu Bei, Jiangdong Group led by Sun Quan. The political bloc led by Cao Cao had the most abundant strength and talents came forth in large numbers. During the long-term expedition two major factions within formed: Ru一Ying Group and Qiao Pei Group. Ru-Ying Group charged civil service mainly and Qiao Pei Group was mainly made up of generals. These two groups had a long-term punitive expedition since Cao Cao fought against Dong Zhuo. Finally they unified vast areas of Northern China and carried out fruitful management, which avoided serious damage in the region by a long war and laid a good economic, political and military foundation for the unification of China in the future. Cao Cao fought against Dong Zhuo at the beginning, seizing Yanzhou, Zhangxiu, Xuhuai, Guandu, the four states, Wuhuan and Jingzhou, beat the seemingly invincible powerful opponents one after another. His forces got stronger and stronger. The two major political groups of Cao Wei supported Caocao on political and military aspects. Because these two groups represented the interests of their own, inevitably buried hidden dangers of can get on well with in adversity but can not share wealth. Ru-Ying Group is represented by the family of Han who was in the name of safeguarding the rule of the Eastern Han dynasty but to protect their interests. They can support Cao Cao's domination, but resolutely oppose his taking over Han dynasty. Qiao Pei Group on behalf of Cao Cao's family numbers who wished to gain greater benefits through Cao Cao's taking over Han dynasty. AD 209 years, The Battle of Red Cliff, which was Cao Cao's great cause of reunification of the most important ended in failure. As the highest strategic staff groups, Ru Ying Group throughout the campaign process simultaneously inconceivable aphasia, and the army of Cao Cao was defeated. Cao Cao became unable to dominate the country again in the rest of his life. This result was what Sun Quan, Liu Bei would like to see, Ru Ying Group was also willing to see it. From the historical records there was no record of staff at the Advanced Medium's death to give people the impression that Ru-Ying Group seemed to have known the defeat in advance. When Cao Cao was still alive, Qiao Pei Group holded the upper hand. But after the death of Cao Cao, Ru-Ying Group strongly supported Cao Pi to be the king. Finally Chen Qun put forward "Jiupinzhongzheng system", which established the family of Han's political monopoly. The two major political groups gradually moved towards a balance. After the death of Wei Ming King, the two major political groups split from co-operation, eventually formed a situation of endless immortality. Cao Shuang and He Yan of Qiao Pei Group were launched by Sima Yi through Gaopingling case when the situation was good. Sima Yi killed Cao Shuang and holded military and political power in the country. He cruelly blowed members of the Group Qiao Pei through a series of charges against them. Then, Jin Dynasty took place Wei. Ru-Ying Group obtained a comprehensive win. While Qiao Pei Group after its three generations with a heavy heart exit stage of history.

全文：东汉末年,群雄并起,战乱频繁,最终形成以曹操为首的曹魏集团、刘备为首的蜀中集团、孙权为首的江东集团,其中以曹操为首的政治军事集团实力最为雄厚,人材辈出,并在长期征战中形成了内部的两大派别:汝颍集团