共查询到20条相似文献，搜索用时 326 毫秒
1.
通过对红古区2004至2008年生产基地、农贸市场、批发市场、产销企业及超市销售的白菜类、芥菜类、绿叶菜类、瓜类、茄果类、豆类、葱蒜及多年生类8大类26个蔬菜品种质量安全状况进行分析,总结出红古区蔬菜质量安全发展的趋势,找出红古区蔬菜质量安全存在的问题,从而提出红古区蔬菜质量安全发展对策。 相似文献
2.
3.
本文对呼和浩特市地区种植的绿叶菜类、葱蒜类、根菜类、薯芋类和瓜类等３０种蔬菜中的氨基酸、粗蛋白、租脂肪、粗纤维等成分含量进行了研究分析，对蔬菜品种选育、改善和调节人民生活膳食结构，有重要的参考价值。 相似文献
4.
黄石市蔬菜硝酸盐污染现状及评价 总被引：1，自引：0，他引：1
调查了黄石市主要蔬菜品种的硝酸盐污染状况。结果表明,蔬菜的种类、品种及不同部位间硝酸盐含量差异较大,其中苋菜的硝酸盐含量最高;不同种类蔬菜硝酸盐含量为根菜类叶菜类甘蓝类薯芋类豆类茄果类瓜类;不同部位的硝酸盐累积量为根系茎叶瓜(花、果),叶柄叶片,瓜果皮瓜果肉。食品卫生标准评价表明,黄石市主要蔬菜中根菜类、叶菜类、甘蓝类、薯芋类、葱蒜类、豆类平均含量均已超过污染水平,而茄果类、瓜菜类、水生类、芽菜类、食用菌类和笋类硝酸盐含量较低,食用安全。 相似文献
5.
《西南农业学报》2020,(1)
【目的】通过详细调查、整理分析、明确收集到的云南蔬菜资源的种类及利用价值,为制定云南蔬菜资源有效保护和高效利用发展战略提供基础数据和研究材料。【方法】采用查阅资料、文献研究、实地调查、多种形式座谈、关键人物访谈和室内分析等方法,对云南境内的蔬菜进行了系统调查。【结果】云南蔬菜种类多,涉及的蔬菜种类151种(亚种、变种),隶属37个科;蔬菜的利用也呈现出多样性,包括蔬菜食用的部位分为根菜类、茎菜类、叶菜类、花菜类、果菜类,食用的方法包括生食和熟食(炒、煎、蒸、腌、套炸、包烧、染制);蔬菜资源现阶段面临的严峻性、区域性和民族性等问题,一定程度上制约了蔬菜资源的保护和开发利用。【结论】基本掌握了云南蔬菜资源分布的种类,涵盖了根菜类、白菜类、甘蓝类、芥菜类、茄果类、豆类、瓜类、葱蒜类、叶菜类、薯芋类、水生类、多年生及杂类、芳香类、野菜类等常见的14大类,为云南蔬菜资源的保护和利用提供了依据。 相似文献
6.
福建省城市郊区蔬菜硒含量状况及硒污染评价 总被引：1，自引：0，他引：1
对福建省城市郊区菜地表层土壤的含硒状况和20多种蔬菜品种可食用部分含硒状况进行调查研究,结果表明：各种蔬菜可食用部分（鲜基）硒含量0.4～293.0 μg/kg,其中叶菜类硒含量较高,豆类、瓜类、根菜类和茄果类硒含量较低;绝大部分蔬菜可食用部分硒含量均低于国家食品卫生标准,表明采样区主要蔬菜未遭受硒污染. 相似文献
7.
8.
本文重点对呼和浩特市地区种植的白菜类、茄果类、甘蓝类和豆类菜等36种蔬菜中的氨基酸、粗蛋白、粗脂肪、粗纤维等成份含量进行了研究分析,对蔬菜品种选育、改善和调节人民生活膳食结构,有重要的参考价值。 相似文献
9.
长沙市超市蔬菜硝酸盐含量及污染状况评价 总被引：4，自引：1，他引：3
超市已成为城市中较为重要的蔬菜销售场所,为全面了解超市蔬菜硝酸盐污染状况,保护人体健康,通过定期随机取样方法,对长沙市4大超市春夏季不同种类蔬菜硝酸盐的含量进行了测定分析。结果表明,所调查的7类蔬菜237个样品中,硝酸盐的含量以白菜类蔬菜最高,平均含量为3 130 mg/kg;其次是绿叶类和根菜类,平均含量分别是1 996 mg/kg和1 682 mg/kg;而葱蒜类和其它蔬菜（瓜类、豆类、茄果类）最低,平均含量分别为786 mg/kg和398 mg/kg。蔬菜硝酸盐污染达严重至高度污染水平的超标率,白菜类、绿叶类、根菜类和葱蒜类蔬菜分别为58%-96%,16%-63%,0%-72%、0%-15%;而瓜类、豆类、茄果类蔬菜硝酸盐的污染较轻,达一级污染水平的仅占40%。 相似文献
10.
11.
12.
为了解我国水稻资源的表型多样性水平,通过变异系数、遗传多样性指数、聚类分析、相关分析、主成分分析、逐步回归分析等方法对来自我国6个省份的60份水稻资源的15个主要表型性状的多样性水平进行了分析。结果表明:15个表型性状的变异系数为9.58%~47.15%,其中,谷粒长的变异系数最小,二次枝梗数的变异系数最大;15个表型性状的遗传多样性指数为1.810 1~2.041 1,其中,剑叶长的遗传多样性指数最大,结实率的遗传多样性指数最小;以水稻资源的来源为单位,6个省份水稻资源的表型性状遗传多样性指数均值为0.944 6~1.963 6,各个省份水稻资源的遗传多样性指数差异较大。聚类分析结果表明,在欧式距离0.4处可将60份水稻资源划分为3个类群,各类群表型性状差异明显;15个表型性状数据主成分分析和综合评价表明,60份水稻资源中四川的蜀恢527为表型综合性状排名第1的资源,同时筛选到株高、谷粒长、谷粒宽、一次枝梗数、二次枝梗数与千粒重共6个可作为水稻资源综合评价的关键指标。上述表型性状数据与由主成分分析得到的可用于评价水稻资源优劣的综合评价值,可筛选出综合性状较优的水稻资源,为后续水稻育种工作提供优良的亲本和中间材料。 相似文献
13.
Foa UG 《Science (New York, N.Y.)》1971,171(3969):345-351
High population density and increased institutional specialization, which are relatively novel features of human society. have provided conditions for a more efficient exchange of universalistic resources, while decreasing the opportunity for exchanging particularistic ones. The parallel with physical environment is striking: in both cases technology has created new problems in the process of solving old ones. Whether it is natural resources or interpersonal resources, physical ecology or social ecology, recognizing and defining the new problem is the first step toward its solution. The importance of particularistic resources in solving problems of modern society has scarcely been recognized. Welfare institutions, for example, often require clients to lose status for the money they receive. This form of exchange deprives the client of a resource which is already scarce for him, thus further reducing his chances of autonomous performance as a resource exchanger in society. By ignoring the significance of particularistic resources for social functioning, we tend to see the solution of social problems exclusively in terms of a better distribution of economic resources. Improvement of education, for instance, is considered almost equivalent to allocating more money for schools. Truly money is one of the neighbors of information in the order, but the other one is status. Evidence to suggest that higher status improves educational achievement has, indeed, been repeatedly reported (26). The very mention of particularistic resources in social planning causes uneasiness and bafflement. The economist Levitan (27), for example, in reviewing the activities of VISTA (a program of the Office of Economic Opportunity), wonders how to evaluate goals such as dedication, involvement, and good feeling. The reluctance to include particularistic resources in social engineering will hopefully decrease as we improve techniques for their observation and measurement and as we begin to understand their rules of exchange and their relationship to other resources. The work described here may constitute a step in such a direction. The opportunity to progress more decisively toward a comprehensive picture of the state of resources in society is provided by the proposal to institute social indicators (28). Properly constructed they could supply much needed information about resource deficiencies that affect the health of society and could suggest. measures to overcome them. The purpose of this article has been to summarize some of the knowledge we already possess about interpersonal resources and to outline its application to certain problems of modern society. It has been shown that when resources are classified into six categories and plotted on a two-coordinate space a definite structural pattern emerges. The position of each resource class in the structure appears related to certain properties which in turn affect differentially the exchange of resources in an urban environment. The structural charateristics of resources provide a theoretical basis for the understanding and solution of social problems in modern culture. 相似文献
14.
15.
16.
杂草资源的开发与利用 总被引：1，自引：0，他引：1
从杂草的食用价值、药用价值、绿化价值、育种价值和其他价值等5个方面论述了杂草作为资源开发利用的方向与途径,以期为正确评价杂草、科学管理杂草提供借鉴. 相似文献
17.
18.
19.
Hedberg HD 《Science (New York, N.Y.)》1976,191(4231):1009-1018
20.