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近几年来，洞口县营造马尾松7000公顷，广泛采用切根育苗的苗木，造林成活率95％以上，保存率85％以上，比常规马尾松育苗造林的成活率和保存率提高了40％。 相似文献
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通过对木荷采用芽苗切根移栽和直播育苗造林对比分析，采用芽苗切根移栽育苗、造林、可节省种子５０％，降低育苗成本３８．１％，提高１级苗率４５％；提高要成活率１３．３％；１年生林木生长提高４４．２％，林木林相整齐。 相似文献
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通过对湿地松不同切根处理、不同深度切根的育苗及其切根苗造林等试验,探讨幼苗切根对苗木质量、造林成活率及幼林生长的影响。试验表明:湿地松育苗采取芽苗截根移栽,8月底苗期切主根和侧根,切根深度9~11 cm,苗木质量最优,造林成活率可达98.7%,幼林生长各项指标表现最好,并提前郁闭成林,降低成本,经济效益显著。 相似文献
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大田青苗芽苗移栽就是在温床催芽，待芽酋长至4～5cm“脱帽”后，移栽到大田范床上，培育大田苗。芽苗移栽育苗，苗木分布均匀，生长整齐，利于集约管理，可减少除草用工，可多出苗、出壮苗。在苗芽移栽前，将芽苗的根尖部分切除，这就是芽苗切根移栽，通过切报能促进项报形成，根系发达，提高造林成活率。江西省信丰县林业技术推广站于1991年春，在该公安西乡日光村农户何良山的育苗地上进行了湿地松大田直播和芽苗切根移栽2种育苗方法的对比试验。两种育苗方法育苗地各1亩，采用畦间隔对比，其回地选择清苗种子、土地利用率、三犁三耙、土… 相似文献
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截根菌根化育苗和造林技术 总被引：1，自引：0，他引：1
截根菌根化育苗技术是中国林科院菌根中心研究开发的林业生产先进技术 ,是林业部 1997年林业科技推广项目之一。安徽省太湖县从 1998年春季起 ,连续 3年在湿地松容器苗培育和板栗实生苗培育中大面积推广应用 ,提高了苗木的产量和质量 ,增强了苗木的抗病虫害能力 ,节约了育苗成本 ,取得了良好的经济效益。1 造林步骤国外松容器苗造林是太湖县近几年大力推广的造林新技术。在芽苗移栽过程中进行截根 ,接种菌根 ,实行菌根化育苗。其过程如下 :种子处理—催芽—营养土 (培育基质 )准备—装容器—芽苗接菌移栽—菌根化育苗管理—出圃造林。1 1 … 相似文献
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马尾松苗木切根造林，其一苗木采用切根蘸红泥浆溶液后上山造林，其二苗木采用切根蘸2％的复合微生物菌肥溶液后上山造林，应用2种不同方法对苗木进行处理，对造林后的苗木成活率，林木生长量进行比较。其结果表明：应用复合微生物菌肥溶液处理造林的苗木成活率，林木生长量比用红泥浆溶液处理的苗木造林成活率能提高12％，当年林木平均抽梢提高44．1％。 相似文献
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高寒阴湿山区翅果油树引种育苗与造林试验 总被引：2，自引：0，他引：2
为了丰富高寒阴湿山区育种与造林所需的种质资源,引进翅果油树的插条、种根和种子,采用地膜覆盖插根育苗、播种育苗和插条育苗等育苗技术,进行了育苗试验。结果表明:采用地膜覆盖插根育苗技术的育苗效果高于播种育苗和插条育苗。还引进2年生翅果油树的截干苗木,分别采用与高杆和低杆农作物间作的方法,进行了间作造林对比试验。结果表明:当年造林且与高杆农作物间作造林的效果比与低杆农作物间作造林的好。育苗与造林试验结果均表明了翅果油树可适用于高寒阴湿山区中育苗和栽植。 相似文献
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不同的育苗方法,培育的马尾松苗木,在同等条件下,植苗造林成活率有较大的差异。通过比较试验,旨在能指导我们采取切实可行的方法,培育健壮的马尾松苗木,以提高造林成活率,提高林地生产力和林分效益。 相似文献
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Stem cuttings of Eucalyptus globulus are used within tree improvement programs and for mass deployment. To be successful, cuttings must perform as well or better than seedlings. The root systems of cuttings are fundamentally different from those of seedlings. If these differences influence growth, the differences and their consequences must be identified and the propagation system manipulated to improve performance of the propagules.Cuttings are only a viable alternative to seedlings as planting stock if the method of propagation does not affect their growth and development adversely. Full-sibling cuttings and seedlings of Eucalyptus globulus were compared under controlled environmental conditions to minimise extraneous sources of variation, and to establish whether changes in growth or development were induced by propagation. On three occasions over a period of eight weeks root-collar diameter, shoot height, leaf and stem weight, shoot/root ratios and root system morphology were measured on cuttings and seedlings. Seedlings were taller than cuttings throughout the experiment, but both plant types had similar height growth rates. Diameter growth rates were lower in cuttings than seedlings, and there were differences in both height and diameter growth rates between families. Root system configuration differed between the plant types. Seedlings had strongly gravitropic tap-roots, with two types of primary roots from which secondary roots emerged. Cuttings had no tap roots, and the main structural components of their root systems were adventitious roots formed during propagation. Cuttings did not develop further structural roots during the experiment, whereas seedlings continued to develop primary roots. Individual primary roots of cuttings were longer and had larger mid-point diameters than those of seedlings, but the total length of primary roots was greater in seedlings. Seedlings also had a greater number and total length of secondary roots. Shoot/root ratios, calculated from a range of functional measures, were higher in cuttings than seedlings. 相似文献
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应用天目丝有机肥对1 a生樟子松苗进行浸根移栽试验,结果表明:苗高比对照增长了32%;地径比对照增长了20%;主根长比对照增长了19%;侧根数比对照增长了17%.天日丝有机肥溶液配制的最佳质量浓度为500 mg·L-1. 相似文献
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Modern nursery methods of seedling production in different sized root trainers, were compared by raising seedlings of Pinus wallichiana involving costs incurred and benefits received. In order to provide a common basis for the comparisons, the study involved
the raising of 1000 seedlings annually on a continuous basis for seven years. A relative economic analysis of raising P. wallichiana seedlings in 300, 150 and 100 cm3 root trainers was carried out and we estimated that the root trainers of 300 cm3 capacity recorded the highest total input cost of Rs. 35571 and Rs. 40018 for 1000 seedlings produced annually at discount
rates of 12% and 6%. Seedlings raised in 100 cm3 root trainers recorded the lowest total input cost of Rs. 23390 and Rs. 27737 per 1000 seedlings annually at discount rates
of 12% and 6%. Hence, returns per rupee invested in raising seedlings in the 100 cm3 root trainers accounted for the maximum benefit-cost ratio (i.e., 1.56 and 1.61) at discount rates of 12% and 6%. Thus seedlings
raised in 100 cm3 and 150 cm3 root trainers were found to be most cost effective when compared with seedlings grown in 300 cm3 root trainers. The results can be attributed to the larger number of cells per tray (higher growth density) in the 100 and
150 cm3 root trainers, compared to the number of seedlings in the 300 cm3 root trainers. 相似文献
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《林业研究》2020,31(4)
Seedling quality is important for subtropical tree species endangered by the degradation of natural habitats in southern China.At present,the cultural regime for raising these seedlings involving fertilizer levels and size of container is not clear.In this study,seedlings of three endangered species,red-seed tree(Ormosia hosiei),Zhejiang phoebe(Phoebe chekian gensis),and Zhejiang camphor(Cinnamomum japonicum) were evaluated along with red-bark oak(Cyclobalanopsis gilva) as a reference,a species which is not endangered.Seedlings were raised in 2.8,3.6,5.1,and 6.3 L containers and fertilizer applied at 1.0,2.0,3.0 and 4.0 kg m-3.Seedling height and leaf biomass increased in response to higher fertilizer levels while larger containers resulted in greater stem and root biomass.Root biomass of endangered species seedlings did not respond to neither treatments.Zhejiang phoebe seedlings responded to nitrogen and phosphorus uptake but red-seed tree seedlings were unaffected by any nutrient levels.Red-bark oak seedlings had high nitrogen-use efficiency.Based on the results,it is recommended using at least 5.1 L containers to culture Zhejiang phoebe and Zhejiang camphor seedlings with fertilizer at 3.0 kg m~(-3).Red-bark oak and red-seed tree seedlings should be cultured with 2.0 kg m~(-3) in smaller containers. 相似文献
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Seedlings of the native Australian tree species Acacia holosericea, Casuarina cunninghamiana, Eucalyptus argophloia, E. camaldulensis
and Melaleuca bracteata, were raised in nursery containers which were coated with CuCO3 (50 g l-1, in a water-based paint solution) or left uncoated for three months. Seedling growth of all species in the nursery was generally
less in treated containers, although differences were relatively small. More importantly, CuCO3 treatment reduced the occurrence of lateral roots growing down or coiling around container walls for both three- and six-month-old
seedlings. Twenty-four months after planting both three- and six-month-old seedlings on a semiarid site in subtropical southeast
Queensland, there was no effect of CuCO3 treatment on height or basal diameter development of seedlings. However, sample excavations of root systems showed that the
poor root morphology exhibited by untreated seedlings when in the nursery had persisted in the field. As such poor root form
has the potential to reduce tree growth and wind firmness in the longer term, these results suggest that chemical root-pruning
is a helpful nursery practice when raising seedlings for dryland afforestation, and in circumstances where it may be necessary
to retain seedlings in the nursery for longer than normal to take advantage of infrequent rainfall events.
This revised version was published online in June 2006 with corrections to the Cover Date. 相似文献
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【目的】探究‘凤丹’牡丹种苗的最适移栽时期,为其丰产栽培技术提供参考。【方法】以3年生‘凤丹’牡丹实生种苗为试验材料,设置8个移栽时期,通过大田对比试验,分析移栽后根系活力、叶片光合性能及生物量的变化;采用主成分分析和综合评价的方法对不同移栽时期的成苗效果进行评价。【结果】移栽期可能通过移栽时气温、土壤温度和移栽后土壤积温等环境因素影响‘凤丹’牡丹新根和植株的发育,适时移栽显著促进牡丹苗体的生长发育。在不同的移栽时期,‘凤丹’牡丹植株生长期间的新根总数、木质化新根数、根系活力、叶面积、叶片SPAD值、净光合速率、枝条粗度、根生物量、枝条生物量、总生物量和壮苗指数均有一定差异,而枝条长度和根冠比没有显著差异。9月29日与11月28日移栽相比,单株木质化新根质量和叶面积分别增加了90.26%和51.22%,根系活力和净光合作用速率分别提高了93.53%和60.98%,单株生物量增加了46.00%。经通径分析、主成分分析和综合评价表明:9月29日移栽的‘凤丹’牡丹成苗效果最好。【结论】本研究依据植株生物量、壮苗指数与移栽期气象环境要素的依赖关系,明确9月中旬至10月下旬,日均气温15~20℃气侯条件,是‘凤丹’牡丹的最适移栽期。 相似文献
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设计6种育苗基质进行锦鸡儿育苗试验,对不同基质间的苗高、主根长、侧根数和总鲜重的差异进行了调查和分析,认为70%耕作土+20%森林土+10%河沙为最佳培育基质,并指出培育灌木容器苗应以侧根数作为质量指标。 相似文献
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为寻找岷江柏木最佳的种质资源保存方式,以马尔康市天然起源岷江柏木为对象,从岷江柏木移植试验入手,结合已有的岷江柏木种质资源保存方法,进行了两方面研究:1)探讨了不同移植时间、不同树龄、不同修枝比例对岷江柏木移植的影响。试验共移植216株个体,1 a后成活8株,成活率3.70%。主根发达、须根偏少,土壤贫瘠且砾石含量多,移植施工的直接伤害、移植地环境难以完全相似等因素,直接影响到岷江柏木移植的成活率。2)比较了原地保护、异地移植、采种育苗、存入种质资源库等岷江柏木种质资源保护方式。提出在原地保存不可行的情况下,应优先采取采种育苗,结合入库保存等方式保护岷江柏木种质资源。 相似文献