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日光温室香椿矮化发枝措施 总被引:1,自引:0,他引:1
山东省日光温室香椿栽培,一般是春季进行露地育苗,初冬移入温室生产椿芽,春季待露地香椿采收上市时,再将其移到大田中继续培养苗木,初冬再移入温室栽培,一次育苗可种植3~5年。这种栽培方式由于受温室空间的限制,必须采取化学调控、平茬、环剥等措施,将植株控制在一定高度内进行生产。生产中常采用以下措施,抑制植株向高生长,使其矮化,多发侧枝。 相似文献
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高寒地区温室香椿品种筛选和播期研究 总被引:1,自引:0,他引:1
以黑油椿、褐香椿、红香椿和红芽绿香椿为试材,进行了内蒙古高原南麓地区温室栽培香椿的比较研究,以期筛选出适合高寒地区日光温室栽培的优质高产品种。结果表明:红香椿为该地区温室栽培的首选品种,且确定了温室香椿的最佳播期为3月底至4月初,即地温稳定通过11℃为宜。 相似文献
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陕西省山阳县香椿研究所 《中国果菜》2010,(4):57-61
早期的香椿设施栽培,只在加温温室和阳畦内进行。近年来主要利用日光温室和小拱棚栽植。
1日光温室栽培
一般露地香椿谷雨前后采收,温室香椿春节前后始收,直收到露地香椿上市时结束。在冬春季节供应具有特殊风味的鲜嫩香椿芽,颇受人民群众的欢迎,经济效益和社会效益都十分明显。 相似文献
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<正>1适用范围吐鲁番、鄯善县和托克逊县是新疆葡萄主产地,有悠久葡萄栽培历史,特别适合葡萄生长,使用温室大棚技术进行反季节栽培,能调节葡萄上市时间,提高种植效益。温室大棚适用于葡萄立体栽培。2上市时间及产量指标温室大棚葡萄于5月下旬至6月上旬上市,一般吐鲁番地区露地葡萄在8月上市,比露地栽培提早50~60天;667m2产量可达1500~2000kg。3温室要求温室设计符合高效节能的要求,具有良好的采光、 相似文献
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法兰地草莓花药培养技术研究 总被引:1,自引:0,他引:1
以法兰地草莓为试材,研究了不同6-BA浓度、不同碳源、不同基本培养基对法兰地草莓花药愈伤组织诱导的影响,不同组合的细胞分裂素对愈伤组织诱导分化的影响.结果表明:6-BA浓度1 mg/L、麦芽糖作碳源、MS为基本培养基最适合法兰地草莓愈伤组织诱导.细胞分裂素以6-BA 2 mg/L+ZT 2mg/L组合最适合诱导不定芽分化.试验中观察到:法兰地草莓花药直接接种于MS+6-BA 1 mg/L+NAA 0.2 mg/L+麦芽糖30 g/L的培养基上,70 d后可直接诱导出不定芽,其分化率高达11%. 相似文献
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针对当前普通农林高校中叶插花艺术曳课程理论教学和实践教学的现状及存在的问题进行分析,就深化理论教学和实践教学改革,提高叶插花艺术曳课程教学质量进行探讨. 相似文献
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校园广场是师生在校园中休闲时非常重要的一个场所,是体现校园地域文化的最重要载体,其构成反映了特定校园空间的几何学关系和空间秩序的组织方式。通过围合与沟通、整合与分离、二维面与三维体、比例与尺度等空间组织手法,使其景观形态与所在环境相呼应。以石家庄学院中心广场为例,分析了广场在校园中的应用以及它与一般广场的区别,并进一步探讨了高校校园环境营造时所应关注的内容。 相似文献
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将南方苹果早翠实生苗于1.3 mg/kg铁、pH 5.5;0.13 mg/kg铁、pH 6.5;无铁,pH 5.5;无铁,pH 6.5;无铁,pH 7.8;5个处理中培养,取其幼叶和老叶分别观察其细胞超微结构变化和新、老叶的净同化率,并测各处理中叶片、根系中含铁量.结果表明:各个铁逆境处理的苹果苗都呈现出极为明显的失绿症状,且随铁素减少和pH值升高失绿症状加重,细胞内很少看到微体,淀粉粒很小或看不到.而培养于含铁1.3 mg/kg、pH 5.5营养中的苹果苗其叶肉细胞中的叶绿体发育正常,并可见线粒体、微体及淀粉粒.在有效光合辐射内,正常铁植株幼叶的净同化率比缺铁处理的高2~4倍.正常含铁量及低铁处理的苹果苗的老叶净同化率基本相同,但无铁处理的较低.所有其他各处理的植株根、叶组织中含铁量只有细微的差异. 相似文献
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Michel Riksen Rita Ketner-Oostra Chris van Turnhout Marijn Nijssen Dirk Goossens Pim D. Jungerius Wim Spaan 《Landscape Ecology》2006,21(3):431-447
In the Netherlands the total active inland drift-sand area has been declining rapidly during the last 50 years. To preserve
the inland drift sands, it is necessary to understand its origin and development and the role of human activity in this semi-natural
ecotype. The objective of this literature review is to describe the development of the drift-sand ecotopes, to explain the
rapid decline of the active drift sands, and to develop a management strategy for the remaining active drift sands. Inland
drift-sand landscapes are relatively young landscapes of Holocene age. They often occur as oval-shaped cells with a length
of 1.5 to over 6 km in the direction of the prevailing wind. These cells presumably represent reactivated deposits of Younger
Cover Sands. Large-scale erosion events in combination with human activity suppressed the development of vegetation. After
the change in land use in the first half of the 20th century in which most of the drift sands were re-afforested, the vegetation
succession started to show a progressive development. In this stage inland drift-sand ecotopes developed in most of the remaining
drift sands with all forms of the typical succession stages from bare sand to forest. The rate at which this development took
place mainly depended on the geomorphological development stage of the area, the area size and human activity. Since the 1960s
the increased nitrogen deposition has accelerated the vegetation succession, not only resulting in a further decline of the
drift sands, but also in a loss of the fragile balance between the different ecotopes and loss of its typical habitants like
the Tree Grayling and Tawny Pipit. Most drift-sand vegetation and fauna need the presence of bare sand nearby and a certain
level of erosion activity to survive. To preserve the drift-sand ecotype, it is therefore recommended to keep the area affected
by erosion sufficiently large (process management). In the meantime one should also ‘maintain’ or increase the wind force
in the drift-sand area by suppressing the growth of high vegetation and removing trees, which form a wind barrier. In areas
which are less suitable for reactivation, one could restore the mosaic vegetation by removing the vegetation on a limited
scale (pattern management). More research is needed to develop a more balanced management strategy and to develop a management
tool for the managers of inland drift sands. Also the role of the increased nitrogen deposition in the regeneration process
needs further investigation in order to find an effective way to suppress its effect. The development of management strategies
for the Dutch inland drift sands might be of great value to drift-sand areas in Western Europe where nature conservationists
start to show more interest in the restoration of former drift-sand areas. 相似文献