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春萝卜主要在长江中下游地区栽培,由于这个季节栽培萝卜前期低温,极易通过春化作用,后期温度升高就易抽苔,因此,春萝卜必须具备两个条件:一是要求抽苔要晚,萝卜冬性强;二是生育期短,生长速度快,在抽苔之前萝卜就可以上市。以前栽培的春萝卜品种主要是醉仙桃和大红袍,产量低,易抽苔,仅在我国部分地区种植。由于近年来城市居民生活水平不断提高,对春萝卜的需求量越来越大,价格也逐渐上涨,1997年春,武汉市春萝卜价格在 3. 0元/kg左右。我所经过引进、观察、培育,发现两个优良春萝卜新品种。现将其特征特性及栽培技术介绍如下: 一、品种介绍 (一)白玉春梦卜:韩国世农种苗有限公司生产。该品种生育期为75天左右,花叶,叶色深绿,肉质根长圆柱形,表皮白色,肉白质脆,单根重0. 3kg左右,产量 1600kg/667m~2。2月上中旬播种,4月中下旬收获。该品种冬性强,早春播种不易抽苔,耐寒性强,商品性状好,不易糠心。但种子价格过高,国内价格在1000元/kg以上。 相似文献
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为了探讨春萝卜在武汉地区秋冬季保护地栽培,满足春节期间需求的可能性,选择了20个来自韩国的春萝卜进行品比试验。通过对不同萝卜品种地上部性状、产品器官性状、产品产量以及品质、叶片数与产量的关系进行分析。结果表明,这些萝卜品种在秋冬季保护地栽培基本上生长良好。特别是东洋雪王春、YR新春白玉、特新白玉春、新白玉春A、白玉美5个品种的品质好,产量高,属于优良品种,值得大力推广。 相似文献
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春萝卜是渡淡补缺的优良蔬菜品种,鹰潭市月湖区引进韩国白玉春和大棚大根萝卜,利用大棚试种028hm2,收萝卜13944kg,折合每6667m2产萝卜3320kg,产值达5000余元,获得了良好的经济效益和社会效益。现将主要栽培技术介绍如下:1 品种选择白玉春、大棚大根(均属韩国种),这两个品种产量高,肉质细嫩,不糠心,不易抽苔,肉质根、白净、整齐。2 菜地选择以土层深厚、排水良好、肥沃疏松的沙质壤土为好。3 整地施肥扣棚春萝卜产量高、肉质根长,后期生长有向上露肩的特性,要实行“两耕两耙”。翻耕工作宜在1月份完成,第一次翻耕时要深,将较大的土… 相似文献
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特新白玉春萝卜是韩国产的杂交一代春萝卜品种,其叶片平展,不易抽薹;肉质根洁白,长圆筒形,肉质致密,糠心晚,歧根、裂根少,商品性好。一般播后60天左右采收上市。该品种根长30~38cm,根径7~9cm,单根重1.2~1.8kg,最大达2.8kg,每667m^2产量4000~5000kg。我县四山乡从2003年春开始引进试种,2004年生产面积迅速扩大, 相似文献
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春红优萝卜是以不育系98A-S2为母本,春季晚红自交系2003-S11为父本配制而成的春季萝卜新品种.该品种皮红肉白,多汁、脆嫩、微辣、带甜味,生长期50-70天,667 m.产量5 700 kg,耐低温弱光,商品性好,效益高,是发展高效农业的优良品种. 相似文献
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“春白二号”萝卜是武汉市蔬菜研究所经多年选育而成的新品种。于1997年通过武汉市科委的鉴定。该品种克服了过去春夏萝卜易抽薹、产量低、品质差等缺点。由于上市早,种植效益高,已成为本地区缓解蔬菜春淡现象的主要品种。几年来,该品种已推广到全国许多地区。其经... 相似文献
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山水园林城市的建设是一个城市发展和改善人居环境的有效途径,在山水园林城市建设中特色植物的应用有着不可替代的作用。通过对安康市山水园林城市建设中植物资源的应用情况的全面调查,统计出乡土特色植物与外来植物种类及比例,分析了安康山水园林城市建设中植物选择和应用中存在的问题,并对如何应用特色植物,营造具有安康特色的山水园林城市提出建议。 相似文献
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通过对安康中心城市的区位分析,结合秦巴山区蕴藏的丰富景观植物资源及自然山地、水域资源等优势,提出了构建安康中心城市地域特色绿地景观的途径是:因地制宜,确立城市绿地景观形象的意境定位;合理规划绿地系统,形成"水在林中,城在林里"的景观格局;尽快确立市树、市花、市果;合理规划城市绿化树种,塑造过渡带特色绿地景观等途径,从而打造富有地域特色的城市绿地景观。 相似文献
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通过对安康油茶产业发展现状和优势的系统分析,从提高认识,抢抓机遇;坚持良种引进与选育相结合,推广应用早熟高产油茶良种;加快油茶栽培关键技术的研究与推广,实现标准化生产;培育龙头企业,打遣知名油茶品牌;加强领导,推动油茶产业健康发展等5方面提出打遣北方优质油茶基地的对策措施。 相似文献
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早熟大果型樱桃良种‘红灯’ 总被引:1,自引:0,他引:1
‘红灯’樱桃是‘那翁’和‘黄玉’的杂交后代, 属于早熟大果型品种。该品种在陕西关中、汉中、安康、商洛地区都适宜栽植, 性状表现优良, 稳定, 平均单果质量8.9 g, 最大可达12 g, 果实发育期只有45~50 d, 连续结果的能力较强, 果实风味佳。 相似文献
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采集云南省蒙自市引种栽培的紫锥菊,以其根、茎、叶和头状花序为试材,采用高效液相色谱(HPLC)方法研究了松果菊苷的定量分析方法,并对建立的分析技术进行方法学考察,运用该定量分析技术对紫锥菊中不同部位的松果菊苷含量进行测定。结果表明:松果菊苷含量在0.021~0.321μg范围内与峰面积之间呈良好的线性关系,平均加标回收率为93.24%,RSD值为1.28%;紫锥菊不同部位松果菊苷含量在0.075%~0.221%范围内,且叶、头状花序中松果菊苷含量显著高于根和茎中含量。建立的松果菊苷测定分析方法定性定量准确、可靠、重现性好,可用于紫锥菊药材中松果菊苷的质量评价;云南省蒙自市引种栽培生产的紫锥菊药材中松果菊苷含量较高,优于国外原产地及国内报道的引种栽培区。 相似文献
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水分条件对陕西安康地区枇杷幼果期生理的影响 总被引:1,自引:0,他引:1
为研究不同水分条件对幼果期枇杷生理代谢的影响,以冬春季干旱的陕西安康地区(枇杷自然分布的北缘地区)14年生‘长崎早生’枇杷为材料,从2013年8月底(现蕾期)开始,分别每株树灌水0、10、20、30、40 kg,每月1次,共灌水5次,于2014年1月底采集叶片和幼果进行生理指标测定。结果显示,幼果期枇杷叶片总叶绿素和可溶性蛋白质含量随着灌水量的增加呈现先上升后下降趋势;MDA和可溶性糖含量以及PAL活性在叶片和幼果中均随着灌水量的增加而逐渐降低;脯氨酸含量和SOD活性均随着灌水量的增加呈现下降趋势;相对电导率的变化差异不明显。试验表明,当灌水量30 kg时,可使土壤水分保持在22.2%左右,有利于幼果期枇杷的生长。 相似文献
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H. Rahardjo F.R. Harnas E.C. Leong P.Y. Tan Y.K. Fong E.K. Sim 《Urban Forestry & Urban Greening》2009,8(4):237-247
As trees are planted in close proximity to properties and humans in a dense city like Singapore, uprooting of trees can pose safety concerns. Previous research studies have shown that soil properties are important factors that govern tree stability. Soil properties can be improved by mixing top soil (TS) with coarse-grained soil. The effects of soil improvement using coarse-grained soil on tree stability were investigated in this study. Granite chip was used as coarse-grained soil to improve the original top soil. Static analysis and finite element modeling were performed to study tree stability in an improved soil. Factors investigated include root geometry and soil shear strength parameter. Finite element results showed good agreement with static analysis in determining the maximum wind force needed to uproot the tree. Parametric study showed that the wind force needed to uproot the tree was influenced by the mode of failure and the magnitude was dependant on the root geometry and the soil properties. A mixture of 20% top soil and 80% granite chip by dry mass was the optimum mixture for withstanding the maximum wind force needed to uproot the tree. 相似文献
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Growth conditions at urban street-tree sites are unfavorable and tree vitality is increasingly threatened by water scarcity due to changing climate. Developing adaption and management strategies to ensure early stage and long-term tree- and root growth requires thorough knowledge about root zone soil-water dynamics at young urban street-tree sites. Therefore, we established a soil water potential (SWP) monitoring at 17 young urban street-tree sites in the city of Hamburg, Germany. Over four years (2016–2019) we measured and quantified critical soil water availability in the root ball, planting pit, and surrounding urban soil using a threshold value (SWP < −1200 hPa) and assessed the tree sites sensitivity towards meteorological variables, tree- and site characteristics using a data driven random forest model. During 2018 and 2019, average critical soil water availability in the root ball and planting pit occurred between three to five months per year, and the trees were exposed to prolonged periods of critical soil-water availability for two consecutive years. After planting, critical soil water availability increasingly shifted year wise from the root ball into the entire planting pit as a consequence of root development and increasing water demand of the trees. Considering less usable water within the surrounding sandy soils, soil water in the planting pit may be depleted earlier and more rapidly with tree aging. The random forest model successfully predicted critical soil water availability and identified tree age as an important predictor. Long-term (10-day) rainfall was the most important variable predicting the occurrence of critical soil water availability, suggesting a further extension of periods with critical soil water availability as rainy summer days are projected to decrease with climate change. Additionally we identified soil temperature as a more important predictor than air temperature as it reflects site specific characteristics affecting water- an energy balance. This study underlines the urgency to adapt the growing conditions of young urban street-trees in terms of sufficient water storage, and provides an approach for future application in tree site soil water management, to maintain their vitality under urbanization pressure and climate change. 相似文献