排序方式: 共有48条查询结果,搜索用时 296 毫秒
31.
住高楼养兰的朋友都会遇到一个十分棘手的问题,那就是空气湿度难以解决。几年来,笔者对此进行了一些探索,找到了一个省工省时、经济实惠、效果好的简易方法。那就是用塑料脸盆、饮料瓶等作容器,装满水放兰盆周围,这样便保持了一定程度的空气湿度。笔者用此法莳养的80多种数百盆兰花,成活率高,新增苗数多,盆盆都开花。 相似文献
32.
33.
乔晓波 《新农村(黑龙江)》2011,(9):240-240
自从涟水县被财政部和中国气象局确定为“2011年乡村气象服务专项”试点县后,气象部门乘风而上,率先在两个现代农业重点镇示范性开展“农村气象灾害防御体系和农业气象服务体系”建设。示范镇的作用,创造性打开“乡村专项”建设局面,以至县委县政府把乡村气象服务作为促进“三农”工作的新举措, 相似文献
34.
赖承启 《畜牧兽医科技信息》2023,(7):164-166
目的:分析高楼养猪养殖优势和养殖成绩。方法:随机选取某平房养猪场仔猪189头,选取某高楼养猪场仔猪247头,本次研究时间为2021年7月~2022年6月,比较两种不同养殖方式对猪蛋白、能量利用率及对猪生长性能产生的影响,比较高楼养猪与平房养猪仔猪断奶成本及母猪提供断奶仔猪头数及出栏肥猪头数。结果:高楼养猪蛋白利用率及能量利用率均高于平房养猪,差异有统计学意义(P<0.05)。高楼养猪与平房养猪仔猪初重差异无统计学意义(P>0.05),高楼养猪猪群末重、自增重均高于平房养猪,高楼养猪猪群日采食量、死亡率、腹泻率及料重比均低于平房养猪,差异有统计学意义(P<0.05)。高楼养猪仔猪断奶成本明显低于平房养猪(P<0.05)。与平房养猪相比,高楼饲养母猪提供断奶仔猪头数及出栏肥猪头数均更高(P<0.05)。结论:与平房养猪相比,高楼养猪具有非常显著的优势,不但能够降低养殖成本,还能够提高养殖效率、提高出栏率,具有更好的经济效益,同时还能够取得良好的环保效果,值得推广。 相似文献
35.
Urbanization is developing rapidly in the world, which seriously changes the habitat of organisms and has clearly a negative effect on biodiversity. Preservation of biodiversity is crucial in urban planning and management, which is also an important symbol for the level of greening. Problems such as scarcity of urban green space and plant species have become obstacles to the establishment of ecological friendly cities. However, coexistence of nature and modernization, as well the coordination of economic development and biodiversity, are goals that people are seeking. We have taken the builtup areas of Beijing as a study case and discussed the impacts of urbanization on plant diversity, with the support of fieldwork and SPOT remote sensing data. The results are as follows: 1) in the process of urbanization, exotic plants have been widely introduced, which has affected species composition and the proportion of native plants; it is clear that artificial green spaces always will have a lower level of plant diversity than natural green spaces; 2) functional differences of green space types partially decide their species abundance, so that plant diversity in greenbelts and streets is generally lower than in parks; 3) the spatial variety of plant diversity contributes much to the imbalance of district de- velopment and the planning of different functional zones; this variation is embodied in different ring-belts and directions; 4) habitat fragmentation also affects plant diversity to a great extent; there is a significant positive correlation between high fragmentation and low plant diversity. According our results, some suggestions are proposed, which would be suitable for the preservation of plant di- versity and ecological improvement during urbanization. 相似文献
36.
为了提高杨梅的品质和产量,推动水果业的健康发展,选择利于杨梅果树高质量、高产出的栽培技术具有重要意义。本文介绍瑞安市杨梅主产区高楼镇的杨梅抗逆配套栽培技术,以期为杨梅生产与发展提供参考。 相似文献
37.
38.
飞机掠过德国上空,从舷窗向下俯视,深领唐代大诗人杜甫“会当凌绝顶,一览众山小”的感慨。德国十分注重环境保护,山地森林茂密,平原绿草如茵,城市高楼的屋顶撑起朵朵绿云。花繁叶茂的“空中花园”,从天空与地上,连成多姿多彩的奇观。 相似文献
39.
设计了一套适用于高楼雨水收集发电的整体系统,并对该系统的经济及环境效益进行了分析。结果表明:该系统结构简单,节约资源,也易于推广,具有广阔的发展前景。 相似文献
40.
韩博强 《农村.农业.农民》2010,(2):39-41
一座还在建造中的世界村级第一高楼、中国排名第八的摩天大楼,将有着“天下第一村”之称的江苏华西村推向了舆论中心。华西人为何如此?是简单炫富,还是发展的要求?
作为中国新农村建设和共同富裕的“样板”,华西人此举会否增大其与周边地区的差距,甚至让“共同富裕”走了样…… 相似文献