巴旦杏的有机栽培技术   总被引：3，自引：1，他引：2  

曾斌  唐开文  宋清白  马亚伟 《经济林研究》2006,24(3):48-52

阐述了近几年在新疆南疆喀什地区英吉沙试验总结的巴旦杏(纸皮、双果、鹰嘴、麻壳、晚丰等品种)建园、树体与水肥管理、病虫草害防治及果实采收、贮运等的有机栽培技术,适用于有机认证的巴旦杏的栽培。  相似文献   

初创期民主管理型合作社的基本矛盾和发展对策     

赵慧峰  李彤 《河北农业大学学报(农林教育版)》2006,8(3):58-61

由于有外界推动力量的介入,民主管理型合作社表现出不同于其他合作社的特征。目前,存在4个基本矛盾:社员需求与合作社供给之间的矛盾、发起者理念导向的公益性与合作社作为经济组织的趋利性之间的矛盾、组织建设超前与业务开展缓慢之间的矛盾、合作社民主管理的要求与管理人员能力和动力之间的矛盾。根据制度经济学理论提出了:充分发挥民间力量的推动作用、克服“路径依赖”的牵绊,培养农民的长期合作能力,提高合作社的管理水平,政府给予扶持和资助等5方面对策。  相似文献   

苹果良好农业操作规范的研究与建立   总被引：2，自引：0，他引：2  

聂继云  丛佩华  李海飞  李静  杨振锋  王孝娣 《中国农学通报》2007,23(8):315-315

良好农业操作规范是实行农产品生产全程质量控制的有效手段,在全世界得到广泛应用。笔者引进世界上最为先进、实用的良好农业操作规范体系EUREPGAP,在消化、吸收的基础上,研究建立了适合中国国情的苹果良好农业操作规范,包括“可追溯性”、“记录保存和内部自查”、“品种和砧木”、“园址选择与管理”、“土壤管理”、“肥料施用”、“灌溉”、“植物保护”、“采收”、“采后处理”、“废物、污染物的管理、回收和再利用”、“员工的健康、安全和福利”和“环境问题”等13章和52个记录表格,并引用了13项国家标准、4项农业行业标准和3项法律法规  相似文献   

Sustainable management of native and exotic plantations in Australia     

Turner  John  Gessel  Stanley P.  Lambert  Marcia J. 《New Forests》1999,18(1):17-32

The emphasis of plantation management changes as the resource and the market develop. This is especially the case when a plantation program is developing a new timber resource, is not the case with many of the Pinus radiata (D. Don) plantings in the southern hemisphere. Australia establishes and manages plantations of both exotic conifer and native hardwood (Eucalyptus spp.) plantations, and these vary in their stage of development. The tenure and objectives in establishment have varied, but some key aspects of the resources may be analyzed. Optimization of production per unit area was not a prime objective during the developmental stages of many exotic pine plantations. Currently, with increased commercial emphasis, this has changed to a greater focus on increased value through Site Specific Management and tree improvement through which gains of at least 20 percent are expected during the first stages. With a key objective of sustainability, questions regarding impacts of soils, water, and biological changes need consideration and are being addressed. The eucalypt plantation resource in Australia is smaller in extent than is the pine resource, but of increasing importance, especially as the plantations are perceived to be more environmentally and ecologically acceptable than exotic conifers. In the past, questions of productivity, especially in relation to impacts of natural pests and diseases, have been raised. Sustainability of all plantations is a critical aspect, however, for specific issues there are different emphases with different species. For example, the relatively, high removal of calcium in smooth barked Eucalyptus plantations is seen as important in long term forest management. This revised version was published online in June 2006 with corrections to the Cover Date.  相似文献   

The effects of selective logging on stand structure and the regeneration of subboreal forests in Hokkaido, northern Japan     

Takuo Nagaike  Yasuhiro Kubota  Nobuyuki Watanabe 《Journal of Forest Research》1999,4(1):41-45

We investigated the effects of selective logging on stand structure and regeneration in selectively logged subboreal forests in Taisetsuzan National Park in Hokkaido in northern Japan. The basal area decreased and the size structure of trees altered in the stands studied due to repeated, intense selective logging, in which larger trees were cut down as a priority. Sapling density in the stands was much lower than that in primary forests. In the simple and multiple regression analyses that were used to estimate the effects of selective logging on sapling density, sapling density had a significant positive correlation with tree density and had little correlation with the density of logged stumps or the height ofSasa (dwarf bamboo) growing on the forest floor. These results suggest that the establishment sites around canopy trees influenced the establishment of saplings, rather than the gaps caused by selective logging. However, both the coefficient of determination and the standardized partial regression coefficient of multiple regression analysis were higher for the stand with a dense cover ofSasa than for the stand with a sparse cover ofSasa. Thus, the success of regenerating forests with selective logging depends on both the site of advanced regeneration and the light conditions that regulate growth.  相似文献   

紫羊茅在云南的栽培管理   总被引：6，自引：0，他引：6  

邓菊芬  韩烈保 《草业科学》1999,16(3):26-28

通过多年的引种观察,研究分析了紫羊茅草坪草的影响因子,总结了紫羊茅草坪的栽培管理措施,以充分发挥紫羊茅在云南草坪绿化环境中的作用。  相似文献   

Effect of spatial heterogeneity on natural regeneration of Manchurian ash   总被引：4，自引：0，他引：4  

韩有志  王政权 《林业研究》2000,11(2):89-94

lntr0ducti0nSpatialheterogeneityisanimportantcharacteristicofecoIogicatsystem,itisreceivingm0reandmoreattentionbecauseofitsdeterminingroIeinecoIogicaIpatternandprocess(Robertsonetal1993,CadweIletal.1994,W8ngetal1997,1998,Lieta/1998,W8ng1999,Davieetal.1998).Spatialstructurecre-atedbymanyfactorsprofOundIyinfIuencesthedy-namics,composition,andbiodiversity0fcommunity(Tilman1994).DimensionanaIysisinspaceisindis-pensabletoexplaintheage-oIdquestionsaboutthemechanismsofplantcoexistenceinseeming…  相似文献   

Mulch and hexazinone herbicide shorten the time longleaf pine seedlings are in the grass stage and increase height growth     

Haywood  James D. 《New Forests》2000,19(3):279-290

Herbaceous plant control with mulchor hexazinone herbicide influenced planted longleafpine (Pinus palustris Mill.) seedling totalheight on a silt loam site in central Louisiana. Thesite had been sheared and windrowed in 1991 and rotarymowed before three treatments were established in arandomized complete block design: (1) Untreatedcheck: no herbaceous plant control after planting;(2) Five mulches: on each plot, five randomlyassigned mulches were placed around seedlings; themulches were either a mat of cotton, hemlock andpolyester, pine straw, woven polypropylene, orperforated polyethylene; and (3) Hexazinone: theherbicide hexazinone at 1.12 kg active ingredient/hawas annually sprayed in the first two growing seasonsover the rows of unshielded seedlings. The longleafseedlings were planted in February 1993.After three growing seasons, seedlings on the mulchand hexazinone treatments were taller than those onthe check plots. About 59% of the mulched andhexazinone treated seedlings had grown out of thegrass stage (at least 12 cm tall) compared to 17% ofthe check seedlings. After five growing seasons, thepercentage of longleaf pine seedlings out of the grassstage was similar on all treatments and averaged 87%. However, these better growing pines were taller on themulch and hexazinone treatments (a 142-cm average)than on the checks (78 cm). Pine straw was anineffective mulch probably because the straw smotheredthe seedlings. The longleaf saplings were tallestwhen the perforated polyethylene mat was used.  相似文献   

建好竹浆基地 促进经济发展     

陈新丁 《世界竹藤通讯》2003,1(4):19-21

作者通过对竹浆基地建设实施情况进行调研,针对存在问题,提出如何搞好基地建设的几点看法和建议。  相似文献   

土地开发经营组织制度的分析——以平邑县资邱乡为例     

武玉欣  刘金文  张兰敬 《水土保持研究》2001,8(3):114-115

对土地开发经营组织进行了深入而细致的调查。分析了土地开发利用过程中的各种矛盾,在此基础上提出了一个新型的经济合作组织——土地开发经营股份合作社,在土地开发经营中发挥巨大的示范和推动作用。  相似文献