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山杏耐干旱瘠薄,适应性强,经济价值高,是干旱低山丘陵区造林的先锋树种,也是赤峰市调整林业产业结构,大力发展经济林的主栽良种。一、山杏直播造林方法与分析1!整地:不同整地方法和整地季节,直接影响山杏的高生长(见表1)。通过试验对比看出,最佳整地季节为雨季前,回填表土深度是提高苗木高生长量的关键。整地方法:一般为鱼鳞坑、穴状方坑两种,整地时,熟土和表土放在坑的上沿,生土、石块下沿筑埂,整地达到深度后,回填表土和熟土至穴深80%,达不到回填深度的取客土回填,坑面成反坡。2"播种:经过不同时间的直播山杏出苗对比实验(见表2),最佳播种… 相似文献
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对西吉县梯田地埂灌木树种(以杞柳和柠条为主)的栽培技术进行了研究。结果表明：(1)造林整地时，梯形槽和鱼鳞坑整地均可，整地深度以40cm左右为宜，整地时间以雨季预整地最佳；(2)造林方法要根据具体树种而定。柠条最好选择植苗造林，春秋皆宜，杞柳适宜秋季造林，总体上秋造的苗木成活率和存活率明显好于春造。另外，在柠条播种造林时，坡向最好在阴坡；(3)杞柳造林时的种植深度以种条覆土2cm最佳，适宜的几种种植深度模式为：阳坡种条覆土2cm、阴坡种条齐地面、阴坡种条覆土2cm；(4)造林整地、种植深度对苗木生长量的影响较大，造林方法、造林坡向、种植深度对造林成活率和保存率的影响相对显著。 相似文献
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兰州地区无灌溉荒山柠条直播造林技术 总被引：5，自引：0，他引：5
根据兰州市南北两山的自然特点，进行了不同整地方式、播种季节、播种深度、覆盖塑料薄膜的柠条直播造林试验，研究其对成活率、高生长等的影响，总结出了在干旱条件下柠条直播造林的适用技术，为今后进行大面积荒山造林提供了科学依据。 相似文献
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正交设计就是利用正交表来安排试验,利用正交表来计算和分析试验的结果。飞机播种造林以一个播区而言,就是在同一时间内,在不同的立地条件下,所作的人工撒播造林试验,所以可以使用正交表来检查飞播后幼苗保存和分布情况,分析在不同立地条件下,幼苗保存和生长的程度,经过计算分析检查飞机造 相似文献
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人工造林从整地、翻垦土壤开始。整地方式分全面整地和局部整地。简化了种子处理的目的和措施，论述了撒播、条播、穴播、块播等播种方法。介绍了播种造林、植苗造林、分殖造林、插条造林、插根造林、分蘖造林等造林方法。 相似文献
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榆林毛乌素沙地臭柏苗木造林试验 总被引：1，自引：0，他引：1
在榆林毛乌素沙地进行了臭柏苗立地条件、苗木种类、苗木处理、栽植深度等4因素4水平正交造林试验和1a生臭柏扦插苗不同苗木处理造林试验,结果为立地条件、苗木种类、苗木处理对造林成活率有极显著或显著影响,栽植深度对造林成活率影响不显著,最优组合是背风坡、2a生实生苗、苗木带土处理、栽植深度比原土痕迹深3cm;把1a生臭柏扦插苗进行浸水处理、栽植在沙丘背风坡最有利。 相似文献
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人工造林从整地、翻垦土壤开始.整地方式分全面整地和局部整地.简化了种子处理的目的和措施,论述了撒播、条播、穴播、块播等播种方法.介绍了播种造林、植苗造林、分殖造林、插条造林、插根造林、分蘖造林等造林方法. 相似文献
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水是制约造林成活率的最关键因素。为了提高农田防护林的造林成活率，本试验设计了一组以灌水、培土、整穴深度为中心的正交试验，以探求不同因素的贡献和综合措施的作用。试验结果初步表明，在试验设计范围内成活率随着灌水量的增加而加大，培土在春季风大、干旱的气候条件下起到了抗旱保湿的作用。 相似文献
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通过在高原寒旱山地进行造林试验，调查分析不同坡向、不同整地方式、不同造林树种、不同造林季节以及采取地膜覆盖造林方式下，影响造林成活率的主要因素。试验表明，选择抗旱树种、采用汇集径流提前整地、地膜覆盖抗旱造林措施，以及选择阴坡地春季造林，可以提高寒旱山地造林成活率。 相似文献
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The effects of sowing depth, seedling density and mulches on northern red oak seedling survival and growth were evaluated in Wilson State Forest Nursery in southwest Wisconsin, USA. Sowing depths between 2.2 and 6.3 cm, combined with sowing densities of 75 and 150 acorns · m-2, made up five sowing method plots. Mulch treatments of ground corncobs aged 1 year, hardwood sawdust aged 2 years, and no mulch made up 3 subplot treatments. Treatments resulted in a range of densities from 18 to 148 seedlings · m-2. Mulch delayed emergence and increased seedling survival. Increasing sowing depth also delayed emergence. Corncob mulch increased root collar diameter; however, hardwood sawdust, aged for 2 years, decreased both root collar diameter and the number of permanent first-order lateral roots. Increasing sowing depth decreased root dry mass but increased shoot dry mass. Increasing density from 18 to 148 seedlings · m-2decreased root dry mass in this study. 相似文献
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This study was based at the Agroforestry Research Centre, Maseno Kenya. The objective was to evaluate the effects of pre-treatment, seed rate and depth of sowing seed on direct seeding of Sesbania sesban. Direct seeding was shown to be feasible during the rainy season, provided a shallow seed bed was used. Direct seeding at 3 cm furrow depth led to significantly (P = 0.05) greater germination compared to 10 cm depth. There was no effect of pretreatment and seed rate on germination, early seedling growth and dry matter partitioning. Depth of sowing similarly had no effect on early growth and dry matter partitioning. Establishment by direct seeding is relatively non-labour intensive with a probable high adoption potential.This revised version was published online in November 2005 with corrections to the Cover Date. 相似文献
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The establishment and growth performance of directly seeded rainforest tree species on degraded sites was investigated in the wet tropical region of north east Queensland, Australia. Trials were established at three degraded sites previously covered by rainforest, using two different sowing times (the beginning and end of the wet season), and a range of species having different seed sizes and successional status. The results two years after sowing showed that the effects of sowing time on tree seedling establishment were small despite pronounced differences in cumulative rainfall received by the seedlings. Results suggested that at some sites more serious weed competition might be avoided by sowing later in the season. Although some small seeded early successional species could grow quickly, the establishment of these was found to be significantly negatively affected by the growth of weeds, and in most cases, large seeded species showed more consistent establishment. On the other hand the growth rates of larger seeded species were often rather slow, limiting their contribution to early site capture. Results indicate that direct seeding can be a viable establishment method, but the identity of species to be used, the circumstances under which they should be directly sown and the most appropriate timing of sowing will vary with situations. Species characteristics, including seed size, growth rate potential and light requirement will be important to consider in relation to the probable conditions that will develop for seedlings following germination (particularly in relation to plant competition) with or without post-sowing site management, such as removal of weeds. 相似文献
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为探索连翘播种育苗技术的途径,分别进行了连翘种子不同采收期,种子不同的干燥方法、春播与秋播不同时间处理和播后不同覆土厚度等4个对比试验,研究结果表明以充分成熟阴干的连翘种子播种,春播以3月上旬惊蛰后播,覆土厚度0.5~1.0 cm,秋播以9月下旬秋分后播,覆土厚度1.0~1.5cm,播种育苗效果明显,连翘出苗率最高。 相似文献
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张掖市北部荒漠区文冠果大田播种育苗试验 总被引：2，自引：0，他引：2
文冠果是我国北方新型的生物质能源树种,也是优良的防沙治沙树种和退耕还林树种。通过对文冠果苗圃地选择、种子处理、苗期管理等创新技术的阐述,对文冠果在不同播种方式下的发芽率、出苗率、生长量以及后期管理进行对比观察,从种子处理、播种及播种后管理等主要育苗技术环节入手,初步总结和掌握了文冠果大田引种育苗技术,为文冠果在荒漠区大... 相似文献
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Daxing'a11lingforcstregionislocatedintllcllorthcrnpart0fcoldten1peratczoncinChinacharctcri/cdbyl1arsl1climate,shortagcofacculnulatcdtcn1pcraturc,shortgrowingscas0n.Io\`s0iltel1lpcraturclncarly'sprlng'ctcThcmodclsforcultl\'atingsccdlingsarediffcrcntfrol11tI1oscinotherrcgions.lnordcrtoflndouttI1coptll11ul11l11odclsforcultl1atingsccdllngsofDahurlnlarcI1'oncof111alntimbcrtrccspcclcsinthlsrcglon.\"chadcarriedoutcxpcrilllcntlYo111l()89toI9()3andobtaincdtllcsllllplcbutpracticallncthodlbrdctcnnining… 相似文献
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八种珍稀濒危植物引种试验 总被引：12，自引：0，他引：12
１９９２－１９９４年三年来，从内蒙、新疆和甘肃等省（区）的沙区地带引种来的８种珍稀濒危植物，现保存有性和无性繁殖苗近千株，大多已开花结实，经过对沙区８种珍稀濒危植物播种育苗研究认为：准噶尔无叶豆、矮沙冬青、银沙槐３种植物种皮坚硬吸水困难，播前须用浓硫酸处理后再经温水浸泡，才能吸水膨胀发芽；沙生柽柳、半日花、裸果木、绵刺、四合木等植物，种子质地松软，无需特殊处理均可干播发芽，播深适中均能取得较好出苗率。 相似文献