首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 64 毫秒
1.
从天全县退耕还草的模式,草畜配套,相关政策以及相应的效益三个方面阐述退耕还草取得的初步成效,以求在西部大开发实施退耕还草中,获得良好的生态效益、社会效益和经济效益,从而推动生产型草食畜牧业迅速发展。  相似文献   

2.
伊犁河谷退耕还草的模式及生态经济效益探讨   总被引:1,自引:0,他引:1  
退耕还林还草、进行生态环境建设是我国政府制定的一项战略性措施。伊犁河谷需要退耕还草的面积为14.13万hm^2,河谷自然地理条件较复杂,不同地域水、土、光、热条件差异较大,本文就伊犁河谷不同地域退耕还草的模式、生态经济效益及相关技术问题进行了探讨。  相似文献   

3.
西北退耕还草生态建设中值得重视的问题   总被引:2,自引:0,他引:2  
退耕还草生态建设是我国西部大开发的重点内容之一,结合我国西北地区的生态条件和生产实践,从种草规划,草地培育利用,技术服务,种子工程建设,草产业发展及法制,法规建设等方面探讨了西北退耕还草生态建设中值得重视的几个问题及相应的解决措施。  相似文献   

4.
朱立泽 《草业科学》2005,22(8):42-46
以平凉市退耕还草产业化技术开发为例,以产业化系统链中各子系统间的功能协调统一为依据,以退耕还草产业化机制为纽带,在研究建立平凉市退耕还草产业化技术经济效果包括4个一级指标(基础指标、配套指标、服务指标和效益指标)和17个二级指标体系的基础上,采用层次分析法(AHP法)、隶属度函数法和综合效益指数法作为退耕还草产业化技术经济效果的评价方法.经比较得出:平凉市退耕还草产业化技术开发综合指数达到0.595 1,属初步产业化阶段,相对发展指数达到27.268%,年均产业化进步速度达到6.817%.  相似文献   

5.
本文主要针对种草养畜模式及南方退耕还草养畜展开深入研究,先阐述了种草养畜模式及南方退耕还草养畜的重要性,然后分别提出了几点优化措施,其中,在种草养畜模式方面,要求要丰富和创新种草养畜模式、提高牧草的种植技术、退耕还草养畜的管理等,而在南方退耕还草养畜措施,要求要积极发展草食畜牧业、制定优惠政策、注重保护天然草原等,充分彰显出种草养畜模式的应用价值,而且借助南方退耕还草养畜,可以满足生态环境改善需求,将水土流失的发生概率降至最低。  相似文献   

6.
青海省退耕还林(牧)还草地的生态恢复及改良技术   总被引:1,自引:0,他引:1  
本文通过对青海草种区划及栽培技术的简介,探讨了青海高寒地区不同生态类型区适宜种植的优良牧草和退耕(牧)还草地的生态恢复和草地改良技术,旨在为我省退耕还草及生态环境建设提供理论依据。  相似文献   

7.
张毅力  吴滨生 《草业科学》2002,19(12):61-62
退耕还草工作是党中央、国务院近年来提出的一项战略性调整措施,是改善生态环境、优化农业生产结构、实现农村经济可持续发展的必然选择。按照黑龙江省委省政府的统一部署,黑龙江省从2000年开始,在全省范围内有计划有步骤地开展了退耕还草工作。截至目前全省已退耕还草17.3万hm^2,取得了较好的生态效益、社会效益和经济效益。  相似文献   

8.
晁宜林 《青海草业》2002,11(3):32-33
充分利用山区丰富的草地和土地资源 ,结合退耕还草工程 ,引导群众种草养畜 ,放牧与暖棚舍饲相结合 ,使畜牧业生产与生态环境保护同步 ,实现生态和经济良性循环 ,促进山区畜牧业高效和持续发展  相似文献   

9.
青海湖盆地退耕还草的必要性及对策   总被引:4,自引:0,他引:4  
龚成海  周莲 《青海草业》2001,10(3):34-36,44
特殊的地理位置和日趋恶性化的环境 ,促使青海湖盆地要尽快退耕还草。实施退耕还草后 ,不但经济效益得以提高 ,而且还具有明显的生态效益和社会效益 ,因此 ,在青海湖盆地实施退耕还草是势在必行 ,也是一件功在当代 ,利在子孙的大事  相似文献   

10.
永康市种草养畜的模式与技术   总被引:2,自引:0,他引:2  
近年来,永康市有关部门提出了退耕还林(果)、退耕还草、退耕还牧的工作口号,并已取得良好效果。  相似文献   

11.
12.
13.
《饲料工业》2019,(18):54-58
应用电感耦合等离子-质谱技术(ICP-MS),建立饲料中钠、镁、铬、锰、铁、铜、锌、砷、硒、镉和铅等元素的测定方法。对饲料样品的前处理方法、仪器工作参数和11种元素标准曲线进行优化;并以加标回收、分析方法比对和重复测试说明方法的准确性和精密性。方法在0~1 000 ng/ml范围内线性良好,仪器检出限为0.557 7~5.072 ng/ml,具有良好的精密度,其回收率在88.1%~104.4%之间,相对标准偏差小于5.0%。同时与原子吸收和原子荧光方法进行比对,测定结果相近。所建立的方法简单、快速,可替代原子吸收和原子荧光方法测定饲料中的11种金属元素,为饲料的质量控制提供理想的元素分析方法。  相似文献   

14.
15.
In experiment 1, 6 pregnant mares received a concentrate that contained a trace mineral premix that provided 14.3 mg Cu, 40 mg Zn, 28 mg Fe, 28 mg Mn, 0.08 mg Co, 0.16 mg I, and 0.16 mg Se/kg concentrate (group A). Seven mares received the same concentrate plus 502 mg Zn and 127 mg Cu once daily (group B). No differences (P > .05) in foal growth data, or Cu, Zn, and Fe concentrations of mare milk, mare serum, or foal serum were observed. In experiment 2, 6 pregnant mares received the same concentrate as group A (group C), and 8 mares received the same concentrate fortified with 4× the trace mineral premix (group D). Group C mares had higher serum Zn concentration at 1 day (P < 0.01) and 56 days (P < 0.04). Group C mares had higher milk Fe concentration at 28 days (P < .01), and group D mares had higher milk Cu concentration at 56 days (P < .01). Group C foals had higher serum Cu concentration at 14 days (P < .03). The results from this study provide no evidence to indicate that supplementing late gestating and lactating mares with higher dietary trace mineral levels than those recommended currently by NRC has any influence on foal growth and development, or on the Cu, Zn, and Fe concentrations of the mare milk, mare serum, or foal serum.  相似文献   

16.
Breed differences for weight (CW), height (CH), and condition score (CS) were estimated from records (n = 12,188) of 2- to 6-yr-old cows (n = 744) from Cycle IV of the U.S. Meat Animal Research Center's Germplasm Evaluation (GPE) Program. Cows were produced from mating Angus and Hereford dams to Angus, Hereford, Charolais, Shorthorn, Galloway, Longhorn, Nellore, Piedmontese, and Salers sires. Samples of Angus and Hereford sires were 1) reference sires born from 1962 through 1970 and 2) 1980s sires born in 1980 through 1987. The mixed model included cow age, season of measurement and their interactions, year of birth, pregnancy-lactation code (PL), and breedgroup as fixed effects for CW and CS. Analyses of weight adjusted for condition score included CS as a linear covariate. The model for CH excluded PL. Random effects were additive genetic and permanent environmental effects associated with the cow. Differences among breed groups were significant (P < 0.05) for all traits and were maintained through maturity with few interchanges in ranking. The order of F1 cows for weight was as follows: Charolais (506 to 635 kg for different ages), Shorthorn and Salers, reciprocal Hereford-Angus (HA) with 1980s sires, Nellore, HA with reference sires, Galloway, Piedmontese, and Longhorn (412 to 525 kg for different ages). Order for height was as follows: Nellore (136 to 140 cm), Charolais, Shorthorn, Salers, HA with 1980s sires, Piedmontese, Longhorn, Galloway and HA with reference sires (126 to 128 cm). Hereford and Angus cows with reference sires were generally lighter than those with 1980s sires. In general, breed differences for height followed those for weight except that F1 Nellore cows were tallest, which may in part be due to Bos taurus-Bos indicus heterosis for size.  相似文献   

17.
18.
采用液相色谱-串联质谱法测定动物尿液中11种β-受体激动剂残留量,对标准溶液、体积、质谱峰面积、浓缩过程及回收率等测定不确定度因素进行了分析,通过评定各不确定度分量及标准不确定度,得出11种β-受体激动剂的扩展不确定度在0.7 ~ 1.1 ng/mL范围内.由各因素对合成不确定度的贡献比分析可知,影响较大的因素为试验回收率及标准溶液浓度.  相似文献   

19.
20.
文章阐述了文山黄牛的品种特性、现状和保种措施。文山牛保种可采用原产地活体保种,迁地活体保种和现代生物技术保种等多种方式。文山牛体型较大,性情温顺,产肉性能好、活动敏捷、结构紧凑、肌肉强健、肉品质优良、耐粗饲、适应性广、繁殖力和抗病力均较强等特点。文山牛是云南省一个地方良种,种质资源保护刻不容缓。  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号