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几个引种桑品种的叶质试验 总被引:2,自引:1,他引:1
<正>桑叶品质与蚕的生长发育及饲养成绩关系密切,因此,历来受到人们的重视,并且随着生产水平的提高,人们对叶质的要求将更加突出。 80年代以来,笔者从国外引进了一批桑树新的品种材料,并就在苏南地区的表现进行了初步的观察与比较试验,希望从中能选择适合本省蚕区栽培的优质、高产的品种,以满足蚕桑生产对桑品种多方面的需求。本试验调查了其中五个性状表现较好的桑品种的叶质状况。 相似文献
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浙南山区山地资源丰富,日照充足雨量充沛,空气湿度高,日夜温差大,空气清新无污染。这些得天独厚的自然条件,能生产出产量高品质好的桑果。果桑品种“大十”是果叶两用桑,不同的生产目的,用不同的农艺操作,分别能获得果或桑叶的丰收。 相似文献
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<正>乐至县现有1.35亿株桑树中,有18%衰老桑树需要嫁接更新复壮,有23%的幼小桑树需要嫁接成为良桑;在已投产的壮桑中,也有不少是上世纪70、80年代的老品种,需要及时淘汰更新,以有效提高桑叶产量和质量。资阳市林业局、乐至县蚕桑局与蚕桑科研院校合作,引进优良桑品种嘉陵 相似文献
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9个国产狼尾草野生种的特征特性与栽培利用研究 总被引:3,自引:0,他引:3
狼尾草属牧草种质资源十分丰富,全世界约有130种,多产于非洲.我国狼尾草野生种及野生近缘植物现已发表命名的有12种3变种(包括引进种).本文根据云南昆明和甘肃兰州两个牧草种质资源圃的引种结果,介绍了9个国产狼尾草野生种、变种的生态分布、特征特性与栽培利用. 相似文献
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“闽牧6号” 狼尾草是通过辐射杂交狼尾草杂种F1种子诱变和田间双重筛选选育的狼尾草新品种,杂交狼尾草F1种子为美洲狼尾草不育系Tift23A为母本和象草N51为父本配制的种间杂交种,为三倍体杂种,其染色体数为3n=21,其中7条染色体来自美洲狼尾草,14条来自象草。“闽牧6号” 狼尾草鲜草产量高(最高可达348 400 kg/hm2)、品质优(粗蛋白质15.30%)、茎叶比低(0.56),在福建省3~9月均可用茎节繁殖,株行距以50 cm×50 cm或40 cm×60 cm为宜。为获得高产,每次刈割后要及时追肥,“闽牧6号”狼尾草极少有病虫害发生,偶见蚜虫,其鲜草适合饲喂牛、羊等草食动物,也可青贮利用,还可打浆适量饲喂生猪,多余的青草晒制后也可替代稻草栽培双孢蘑菇。 相似文献
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为了提高沙糖橘抗寒防冻能力,达到晚采提质增效的目的,从2008年开始,在荔浦县开展沙糖橘树冠覆膜栽培技术研究及推广应用,结果表明:在12月上旬覆膜,采用双行倒V形架式、单行倒U形架式、单行倒V形架式及直接覆膜等4种方式,可提高沙糖橘抗寒防冻能力、延长市场供应期、提高果实品质、减少农药残留和提高经济效益。目前沙糖橘树冠覆膜栽培技术已在广西北部地区大面积推广应用,获得了显著的经济效益。 相似文献
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结合生产实践,总结河南省果桑栽培管理技术,主要包括果桑品种选择、树型养成、施肥管理﹑菌核病防治等内容,为提高蚕农管理果桑的技术水平和促使河南省果桑产业健康持续发展提供参考。 相似文献
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《Strength and Conditioning Journal》2014,67(3):285-291
Little is known about how cultivation legacies affect the outcome of rehabilitation seedings in the Great Basin, even though both frequently co-occur on the same lands. Similarly, there is little known about how these legacies affect native species re-establishment into these seedings. We examined these legacy effects by comparing areas historically cultivated and seeded to adjacent areas that were seeded but never cultivated, for density of seeded crested wheatgrass (Agropyron cristatum [L.] Gaertn.) and native perennial grasses, vegetation cover, and ground cover. At half of the sites, historically cultivated areas had lower crested wheatgrass density (P < 0.05), and only one site had a higher density of crested wheatgrass (P < 0.05). Likewise, the native shrub Wyoming big sagebrush (Artemisia tridentata Nutt. subsp. wyomingensis Beetle & Young) had lower cover (P < 0.05) in historically cultivated areas at half the sites. Sandberg bluegrass (Poa secunda J. Presl.) density was consistently lower in historically cultivated areas relative to those seeded-only. At sites where black greasewood (Sarcobatus vermiculatus [Hook.] Torr.) and bottlebrush squirreltail (Elymus elymoides [Raf.] Swezey) were encountered, there was either no difference or a higher density and cover within historically cultivated areas (P < 0.05). Likewise, cover of exotic forbs, especially halogeton (Halogeton glomeratus [M. Bieb.] C. A. Mey.), was either not different or higher in historically cultivated areas (P < 0.05). Bare ground was greater in historically cultivated areas at three sites (P < 0.05). These results suggest that cultivation legacies can affect seeding success and re-establishment of native vegetation, and therefore should not be overlooked when selecting research sites or planning land treatments that include seeding and or management to achieve greater native species diversity. 相似文献