云南省设施园艺发展现状及对策   总被引：3，自引：0，他引：3  

刘发万 《中国农学通报》2009,25(1):125-127

云南地处低纬高原,跨越了从北热带到北温带的七个气候带,相似于全国气候的缩影。无论从平面看全省或垂直看一地,都存在典型的“立体气候”。由于地形复杂,设施园艺类型建设呈现多样性。本文结合云南省设施园艺的发展现状、设施园艺的结构类型、设施园艺生产存在问题,全面分析了云南省设施园艺产业的发展状况,提出了云南省发展设施园艺的有关对策。  相似文献   

果品产业可持续发展的科技需求分析——基于北京市平谷区果品产业的调研     

李瑾  秦向阳  马明远  李健楠 《中国农学通报》2009,25(2):291-294

在人们需求提升和自然资源禀赋有限的大环境下,果品产业面临发展空间不足、经济效益徘徊不前、产品卖难等一系列问题。依靠科技对产业进行延伸和改造是果品产业实现可持续发展的根本出路。本研究通过对北京市平谷区果品产业的实地调研,总结了果品在生产、贮藏加工、销售方面存在的主要问题,同时提出了果品产业可持续发展的科技需求对策。  相似文献   

中早熟番茄新品种“黄山1号”的选育及 抗青枯病鉴定     

伍万荣  檀根甲  秦丽  姜浩  吴艳  吴从德  卜训莉 《中国农学通报》2009,25(8):238-240

摘 要：为进一步提升王家寨民俗村的旅游品位,对该村的景观进行了修订性的规划,并运用AutoCAD绘制了景观现状平面图和景观规划平面图,然后分析规划前后景观指数变化,结果表明：规划后各类型斑块数量和密度绝大部分有所增加,景观斑块形状破碎化指数变化较大,多样性指数、优势度指数、丰富度指数均有大幅提高,总之,规划后景观类型集中程度加强,景观更加丰富多彩,旅游设施更为完善,有利于旅游业的发展。  相似文献   

河北省农家旅馆准入及星级评定标准研究     

康晓梅  秦安臣  贾哲  杨会娟  彭玉容 《中国农学通报》2009,25(16):320-323

河北省农家旅馆近年发展迅猛,在带动当地经济发展的同时,也出现了良莠不齐的经营局面,为河北省旅游业的发展带来了诸多负面影响。农家旅馆的标准化经营已经成了河北省旅游发展中迫在眉睫的任务。本文在查询及借鉴兄弟省份已有农家旅馆评定标准的基础上,提出了河北省农家旅馆经营的准入条件,并初步构建了我省农家旅馆的评价标准,以期为我省农家旅馆的持续健康经营提供有效参考  相似文献   

公益林供给与需求分析   总被引：1，自引：1，他引：0  

陈钦 《中国农学通报》2009,25(22):130-133

在中国,公益林需求呈增加趋势,但是由于公益林具有公共物品属性,需求者付费极少,公益林供给者投入成本无法回收,导致公益林供给不足。此文首先对公益林供给和需求进行理论分析和影响因素分析,然后,提出政府要建立公益林需求者付费机制,明确界定公益林的需求主体;激励公益林供给,对公益林供给要分类施策、分类补偿。  相似文献   

Experimental research on heating performance of jetting mixing low pressure heaters     

TONG Ming wei  BAI Xiu juan  CAI Qin  WANG Chao sheng 《保鲜与加工》2009,(12):1436-1439

This paper conducts the experimental study on the performance of steam water two phase flow device composed by a nozzle,mixing chamber and the corresponding valves when the inlet steam pressure is in the range of 0.18~0.22 MPa．The experimental results show that the injector can run stably and reliably and the temperature of outlet water is increased obviously in low inlet steam pressure．This characteristics can be used as effective heaters in the engineering fields such as power plants,heating,the light industry, etc． When a single stage ejector can not meet the requirements of heating conditions, double stage ejectors can be used.  相似文献   

活性污泥降解植物纤维容器的研究   总被引：1，自引：0，他引：1  

景全荣  芦鑫  明媚  冯淑环  刘爽  梅雪莹  蒋伟忠  程永强 《农产品加工．学刊》2009,(11):32-34

生物可降解塑料的开发已经成为目前的研究热点之一,而活性污泥法是常用的评价高分子材料的生物可降解性的方法。以活性污泥的干燥固体总质量(TS)和活性污泥的挥发性固体含量(VS)为考察指标,分析活性污泥对于聚丙烯(PP)、纸制、植物纤维(稻壳)餐具的降解能力。实验结果表明,在降解期间(21 d),纸制餐具降解速度最快,且降解程度最大,植物纤维餐具降解程度低于纸制,而聚丙烯餐具基本不降解。增加降解物的表面积和提高活性污泥与降解物的比值,有利于降解物的降解。  相似文献   

大豆卵磷脂的研究概况   总被引：5，自引：0，他引：5  

马挺军  秦晓健  贾昌喜 《农产品加工．学刊》2009,(10)

大豆卵磷脂是大豆油生产的副产品,简要介绍大豆卵磷脂的结构、功能、应用、提纯和检测方法。  相似文献   

Dynamic emulation of the effect from a single tree to lower solar radiation distribution     

Bin Fang  Qingke Zhu  Wenhua Li  Wei Qin 《Frontiers of Forestry in China》2009,4(3):297-303

By modeling the condition of light climate, we studied the negative effect of shadows in a shelterbelt forest. Based on the calculation of the apparent trajectory of solar motion according to an ellipsoid crown projection model and a Monsi light transmission model, radiation values of 36 experimental sites were measured using a light quantum meter. Estimates of daily solar radiation distribution from measured values were obtained. We built a crown projection model and simulated the conditions of a light climate in the forest. The trajectory of the shadow motion is shaped like a butterfly arc. The situation of the outside is affected by tree height (H) and that of the inner arc by height below the branches. In an area of 1.0 × H (toward the east and west of the tree) and 0.6 × H (toward the north), transmittance was below 90%, which means that the effect of shadow hazards occurs in this area. As well, the effect was strong at the bottom of the tree. The area of shadow hazards in the east and west of the tree was large and small in the south. The projection area of the shelterbelt forest was largest along an east and west direction. A certain distance between crops and the shelterbelt should be maintained when the shelterbelt is in a north-south direction. Therefore, the effect of shadow hazard will decrease north of the tropic of cancer. Cutting out the lower branches from the trees of the existing shelterbelt in a suitable and timely manner can reduce the area of the shadows. __________ Translated from Journal of Northwest A&F University, 2008, 36(6): 113–118 [译自: 西北农林科技大学学报]  相似文献   

不同中药对奶牛乳房炎病原菌抑菌效果的观察   总被引：1，自引：0，他引：1  

张少华  孙丹丹  史万玉  秦建华  钟秀会  包永占  任丽琴 《中国农学通报》2009,25(14):11-14

本试验采用琼脂平板扩散法(打孔法),研究了黄芩等21种中药对从乳房炎奶牛乳汁中分离出的3种主要致病菌的体外抑菌情况。结果发现,大肠杆菌对黄芩高度敏感,对丹参、青翘属中度敏感;金黄色葡萄球菌对黄芩、青翘、丹参、地榆、红花、蒲公英高度敏感,对枳壳、忍冬藤、萹蓄、苦地丁、蟾酥、木通中度敏感;无乳链球对地榆、当归属高度敏感,对青翘、黄芩、蒲公英、丹参、苦地丁、红花、川芎、枳壳中度敏感。为防治奶牛乳房炎有效中药复方的筛选提供了理论依据。  相似文献