共查询到20条相似文献,搜索用时 62 毫秒
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草莓大棚促成栽培需用休眠期浅、产量高、品质优的品种。一般自然休眠中对低温量要少的品种有丰香、明宝、鬼怒甘、女峰等,新品种推广草莓品种有章姬、枥木少女、幸香、益香等,草莓自花结实力强,搭配1~2个其他草莓品种栽培,可提高产量。 相似文献
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通过对12个草莓新品种的引种,筛选适宜通海县种植的加工型品种。试验结果表明,高大乡的露地栽培和坝区的设施栽培均优于坝区露地栽培,平均每公顷产量分别高于坝区露地栽培223.5kg和235.5kg;适合加工要求的品种为日本一号、星都、新明星、鬼怒甘,可在通海县高大乡及坝区大面积推广。 相似文献
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《农业科技通讯》2017,(3)
针对2016年玉溪地区草莓红中柱根腐病大面积发生的现象,采用大区调查和小区试验的方法,探讨了草莓红中柱根腐病发生规律。结果表明:(1)草莓鬼怒甘品种对红中柱根腐病抗性较强,而章姬相反,两者发病率相差7.3个百分点,差异达极显著水平;(2)在气温适宜病菌生长的情况下,土壤水分含量越高,处于茎叶旺长期的草莓植株红中柱根腐病发病率越高;(3)不同移栽期对草莓红中柱根腐病发病率差异达极显著水平,玉溪地区感病高峰期出现在移栽期的8月5~25日;(4)不同种植年限对章姬品种红中柱根腐病发病率有一定影响,但鬼怒甘品种不明显。最后提出了玉溪地区草莓红中柱根腐病的防治方法。 相似文献
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草莓为多年生草本植物,果实柔软多汁,具有香味,富含矿物质和维生素,经济效益高,一般亩产值6000余元,是农村产业结构调整的好项目之一。现将冬草莓无公害栽培技术介绍如下。
一、品种选择
选择抗病性强、优质、丰产、休眠期较浅、耐低温的品种。如:丰香、日本96、鬼怒甘、春香、日本1号、女峰、红峰等优良品种。 相似文献
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红花草莓及其杂交育种研究 总被引:4,自引:0,他引:4
用红花草莓品种“粉红熊猫”(PinkPanda)与栽培草莓品种吐德拉、鬼怒甘、久能早生进行正反交,草莓品种×粉红熊猫组合后代的红花株数∶白花株数比例约为12∶,得到了一批花瓣颜色为微粉、浅粉、粉红色、红色、深红色等不同程度红色的红花草莓共363株,为培育观花观果兼食用、花色多样、花色鲜艳、重瓣性强等更具观赏性的红花草莓新品种奠定了基础。并介绍了新近引入国内的红花草莓“粉红熊猫”的生物学性状和应用状况。 相似文献
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本试验以菜豆品种先行者为试材,采用32孔、50孔两种规格穴盘,设置10、15、20、25 d等4个苗龄段,通过研究不同穴盘规格和苗龄对菜豆性状及产量的影响,筛选出适合菜豆育苗的穴盘规格和适宜的苗龄。结果表明:穴盘育苗的营养面积增大,菜豆产量随之增加,25 d苗龄条件下,32孔穴盘的前期产量和总产量均显著高于50孔穴盘;随着苗龄的增长,菜豆的前期产量和总产量呈增加趋势,其中25 d苗龄的产量显著高于其他苗龄。综合上述各项指标,菜豆育苗阶段,10 d苗龄可选用32孔、50孔穴盘,15 d以上秧苗选用32孔穴盘为宜。 相似文献
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氮素作为重要的营养元素,限制着小麦的生长发育和经济产量,筛选和培育耐低氮小麦品种是提高氮素利用率、降低生产成本的有效途径。以118份不同基因型小麦为材料,在低氮(0.1 mmol·L-1)和正常氮(5 mmol·L-1)条件下苗期水培,测定根干重、茎叶干重、根冠比、植株干重、最大根长、初生根数和二级初生根数等相关指标,采用模糊隶属函数法、主成分分析以及聚类分析法综合评价小麦品种的耐低氮性。结果表明,在低氮胁迫下小麦幼苗的根干重、根冠比和初生根数目显著提高,茎叶干重、植株干重和最大根长不同程度的降低,7个苗期性状指标在两个氮水平下均存在显著性差异。主成分分析提取3个主成分,贡献率分别为 43.575%、22.904%和17.873%,累积贡献率达 84.351%。以耐低氮性综合评价D值进行聚类分析,将118份小麦品种划分为强耐低氮型、耐低氮型、中间型、较敏感型和敏感型5类。筛选出3份耐低氮型小麦(齐大195、金丰7183和天民198)和2份强耐低氮型小麦(山农0917和鲁麦8号)。不同小麦品种的耐低氮机制不同,研究结果为小麦耐低氮品种的选育提供理论依据和材料基础。 相似文献
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Segregation of form, color, movement, and depth: anatomy, physiology, and perception 总被引:63,自引:0,他引:63
Anatomical and physiological observations in monkeys indicate that the primate visual system consists of several separate and independent subdivisions that analyze different aspects of the same retinal image: cells in cortical visual areas 1 and 2 and higher visual areas are segregated into three interdigitating subdivisions that differ in their selectivity for color, stereopsis, movement, and orientation. The pathways selective for form and color seem to be derived mainly from the parvocellular geniculate subdivisions, the depth- and movement-selective components from the magnocellular. At lower levels, in the retina and in the geniculate, cells in these two subdivisions differ in their color selectivity, contrast sensitivity, temporal properties, and spatial resolution. These major differences in the properties of cells at lower levels in each of the subdivisions led to the prediction that different visual functions, such as color, depth, movement, and form perception, should exhibit corresponding differences. Human perceptual experiments are remarkably consistent with these predictions. Moreover, perceptual experiments can be designed to ask which subdivisions of the system are responsible for particular visual abilities, such as figure/ground discrimination or perception of depth from perspective or relative movement--functions that might be difficult to deduce from single-cell response properties. 相似文献
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ICP-OES法同时测定果蔬中铅、砷、镉、铬、铜、锡含量 总被引:2,自引:0,他引:2
果蔬样品经混酸消化后,控制一定的酸度,定容后应用等离子体发射光谱法(ICP-OES)对果蔬中铅、砷、镉、铬、铜、锡六种有害重金属进行测定,研究了分析测定条件,方法简单快速。测定结果表明,五种元素的加标平均回收率在91.0%~107%之间。其RSD均小于3.5%。按该方法进行处理及测定铅、砷、镉、铬、铜、锡,在选择的测定条件下最低检出限分别为0.0006 mg/kg、0.0003 mg/kg、0.00003 mg/kg、0.00005 mg/kg、0.00003 mg/kg、0.0006 mg/kg。 相似文献
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Fiber, food, fuel, and fungal symbionts 总被引:2,自引:0,他引:2
Virtually all plants of economic importance form mycorrhizae. These absorbing organs of higher plants result from a symbiotic union of beneficial soil fungi and feeder roots. In forestry, the manipulation of fungal symbionts ecologically adapted to the planting site can increase survival and growth of forest trees, particularly on adverse sites. Vesicular-arbuscular mycorrhizae, which occur not only on many trees but also on most cultivated crops, are undoubtedly more important to world food crops. Imperatives for mycorrhizal research in forestry and agriculture are (i) the development of mass inoculum of mycorrhizal fungi, (ii) the interdisciplinary coordination with soil management, plant breeding, cultivation practices, and pest control to ensure maximum survival and development of fungal symbionts in the soil, and (iii) the institution of nursery and field tests to determine the circumstances in which mycorrhizae benefit plant growth in forestry and agri-ecosystems. 相似文献