共查询到17条相似文献,搜索用时 78 毫秒
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采用拱棚覆膜、上盖遮阳网的扦插育苗方法,进行白云杉嫩枝与硬枝扦插育苗试验,结果表明,在沈阳周边地区的气候条件下,以IBA 200 mg/kg浸插条90 min,扦插成活率83%,生根率可达85%,且根系发育好,移栽成活率高;嫩枝插条生根率比硬枝插条生根率高57%,两种插条生根率差异达到显著水平;插条在细河沙上的扦插成活率比在木屑上的高20%,生根率提高21%。嫩枝插条扦插后,20 d形成愈伤组织,30 d出现凸起,45 d生根。秋季控水炼苗,冬季床上覆膜覆草越冬。翌年移植成活率可达90%,当年新梢生长量5.5 cm。 相似文献
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落矶山圆柏直径生长期270 d,树高生长期240 d,生长盛期在4月,其次为5、6月,与春梢、二、三梢相对应,是高生长的主要季节。在生产中应根据上述的生长规律,合理安排松土、除草和施肥等措施。 相似文献
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通过对洛基山圆柏在山西省太原地区进行栽培试验,对其地径、苗高、冠幅生长表现进行了观测,结果表明:洛基山圆柏在太原地区生长良好,可作为干旱半干旱地区、水土流失区的重要树种. 相似文献
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The growth of seven Picea sitchensis x Picea glauca hybridswas compared with the growth of two P. sitchensis provenancesand Picea glauca var.albertiana at two sites in northern Scotland.The sites were at Aultmore (an exposed, dry site with a mineralsoil) and Shin (a frosty, wet site with deep peat). They wereof the type considered more suited to Pinus contorta than P.sitchensis. At age 10, in 1984, most of the hybrids, at both sites, wereabout 10 and 20 per cent taller than P. sitchensis of Masset(Q.C.I.) and Ketchikan (Alaska) provenance, respectively. P.glauca var. albertiana grew very poorly, especially at Aultmore. At Aultmore, the frost hardiness of three of the tallest hybrids,the two P. sitchensis provenances, and P. glauca var.albertiana,was tested at about 3-weekly intervals throughout 1982 and 1983.Detached shoots were subjected to artificial frosts in a programmablechamber. P. glauca var. albertiana was frost susceptible atbudburst, but at all other times it was relatively very frosthardy (eg. to10°C in mid-August). Also, the hybridswere consistently more hardy than P. sitchensis of even Ketchikan(Alaska) provenance from July onwards. However, the hybridswere less frost hardy than P. sitchensis of Masset (Q.C.I.)provenance in early spring (they dehardened a week earlier inMarch-April) and their buds were equally as frost susceptibleat the time of budburst. In 1983, trees of P. glauca var. albertianaburst their buds about a week sooner than P. sitchensis. It was concluded that P. sitchensis x P. glauca hybrids canperform better than P. sitchensis at sites considered marginalfor P. sitchensis, and that their good performance may be partlyattributed to, or associated with, their greater summer andautumn frost hardiness. A programme of inter-specific hybridizationis being pursued. 相似文献
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Effects of inoculations of nine fungi to prechilled and nonchilled seeds of Picea glauca and Pinus strobus were studied in unsterilized and sterilized nursery soils, and a peat-vermiculite-perlite mixture. All the fungi demonstrated weak pathogenicity to seeds. 相似文献
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对刺柏硬枝扦插进行了关键技术研究,结果表明:在山丹大陆性干旱、半干旱气候区,入冬前采集健壮母树的2年生侧枝作插条,用ABT生根粉处理插穗,插入用河沙作基质的容器中,在温室条件下常规管理,生长1年后,翌年春移植到小拱棚或防风围栏内,抵挡风害,可提高育苗成活率、保存率。 相似文献