红掌组培快繁中若干问题的探讨

通过红掌组培快繁生产实践认为:正确选择品种和外植体、简化培养过程是组培快繁生产的关键,而降低成本、提高瓶苗移栽管理技术是实现高效益组培苗生产的根本途径。     

新疆皮亚曼石榴微繁殖技术研究

本研究以新疆南疆的珍稀果树皮亚曼石榴的叶片为试材 ,成功地进行了微繁殖。经试验研究 ,皮亚曼石榴增殖培养所用的基本培养基改良White较MS ,B5为好 ;最适增殖培养基为改良White +BA1 .5mg·L- 1 +IBA0 .1mg·L- 1 +GA30 .8mg·L- 1 ;壮苗培养基为改良White +BA0 .2mg·L- 1 +PG1 50mg·L- 1 ;生根培养基 :1 / 2MS+BA1 .5mg·L- 1 +AC1 50mg·L- 1 +PG1 50mg·L- 1 。生根处理中初期暗环境培养对受试品种生根具有相当大的作用。受试品种试管苗的移栽驯化 ,采用三步法移栽 ,首先采用闭瓶强光炼苗、开瓶强光炼苗 ,并移入温室中上覆开孔塑料薄膜的小拱棚中带电加温线的珍珠岩苗床上培养苗 ;其次再移入温室营养袋中培养 ;最后移栽入田间苗圃中。在移栽中逐渐降低湿度 ,适应外界环境条件以保证较高的成活率。     

移栽和打顶时间对晒烟烟碱积累的影响

针对移栽和打顶时间两项影响烟碱积累的栽培措施进行了田间试验.用回归分析法分析表明,烟碱积累与打顶时间呈正相关,回归系数为0.1071,且达显著水平;与移栽时间呈负相关,回归系数为-0.025,也达显著水平.综合分析认为:适宜移栽期为5月25～30日,适宜打顶期应为盛蕾期.     

苗木移栽管理技术要点

针对苗木移栽生产实践当中遇到的实际问题,总结出选苗护根、根系蘸浆、施肥、栽后管理等主要技术要点。     

不同激素处理对厚荚相思组培苗生根及移栽效应

以改良MS为基本培养基,使用不同浓度的NAA、IAA、ABT、IBA和MET对厚荚相思无菌苗进行生根诱导,生根苗按使用不同的激素处理分别进行移栽试验.厚荚相思生根诱导率为11%～100%,其中以改良MS NAA1.0 mg/L的生根率最高,达100%;以黄心土为基质对生根苗进行移栽,移栽成活率为41.25%～81.79%,其中成活率最高为使用NAA诱导生根的生根苗,成活率达81.79%.     

树干钻孔注药提高大规格珍贵濒危苗木移植成活率初探

本文通过树干注药补水,对不易成活的大规格珍贵濒危树种的移植成活率进行了探讨,试验结果表明:此种方法对提高大规格珍贵濒危树种苗木的成活率效果显著,且此种方法简单易行、成本低廉,在不易成活的珍贵濒危树种的移植保护及提高大规格工程绿化苗木的成活率工作中很有实用价值。     

Early gains from planting large-diameter seedlings and intensive management are additive for loblolly pine

A seedling size/intensive management study with Pinustaeda L. was established in 1993 on two sites in the CoastalPlain of Georgia and South Carolina. Each site contained a 2 × 2split-plot study involving two seedling sizes and two levels ofestablishment intensity. Ideotype ``B' seedlings averaged 5.0 mmin diameter (at the root collar) and were 43 cm tall. Ideotype``A' seedlings averaged 8.5 mm in diameter and were 50 cm tall. ``Standard' establishment practices included herbicides(hexazinone and sulfometuron) and fertilizer (DAP) appliedduring the first year. The ``intensive' management involved twoherbicide applications during the first year and two during thesecond year, fertilizer during the first and third years, andinsecticide applications during the first two years (for controlof tip moth, Rhyacionia frustrana Comstock).Intensive management did not affect survival but planting largerseedlings increased survival slightly on one site. However,treatments affected early growth at both sites. On both sites,fourth-year plot-volumes were increased with greaterestablishment intensity and larger seedlings but there was nointeraction between stock size and establishment intensity. Early growth gains were greatest when both intensive managementand larger seedlings were combined. Depending on site, thiscombination resulted in 21% to 51% more volume (at age 4) thanthe next best treatment (standard seedlings with intensivemanagement).     

并联移栽机器人视觉的研究——基于图像的秧苗位置确定

以三平移并联机器人视觉系统为研究对象.采用超绿色(Extra Green)特征分割方法对植物秧苗在钵盘中的彩色图像进行分析,提取出图像中绿色成分,并进行二值化处理;然后,对二值图运用质心法、形态学运算法和中点法3种方法确定图像中心位置,并综合比较3种运算方法,得出确定秧苗根茎位置的最佳方法为形态学运算法.     

不同土壤保水剂对春小麦种植、树苗移栽与树木育苗的影响

采用大田试验,对春小麦种植、树苗移栽和树木育苗实施了不同土壤保水剂(LT-200,LT-100,博亚和皇冠)处理,研究了不同土壤保水剂应用效果及对植物生长的影响.结果表明,施用土壤保水剂能显著提高春小麦产量和水分利用效率.LT-200,LT-100,博亚和皇冠的产量分别较对照(不施加土壤保水剂)增加13.60%,11.43%,4.13%和3.52%.水分利用效率分别较对照提高1.00,0.84,0.31和0.26 kg/(mm·hm2).在春小麦收获期,表土层(0-30 cm)土壤容重较对照下降,其中LT-200和LT-100最明显,分别较对照降低9.4%和10.1%.土壤保水剂可以提高土壤贮水量,在春小麦开花期,LT-200,LT-100,博亚和皇冠0-120 cm土层中的土壤贮水量分别较对照提高27.64,26.92,14.04和13.82 mm.施用土壤保水剂对春小麦根干重、旗叶干重及其含水量产生一定的影响,但规律不明显.施用土壤保水剂对树苗移栽和树木育苗也产生一定的影响.     

人工授精+胚胎移植(AI+ET)法诱发肉牛双胎的试验研究

应用AI ET法分别对3组试验牛处理,人工诱导生产肉牛双胎,双胎率达60.8%(79/130),产犊率147.7%(192/130).其中试验组Ⅱ(自然发情后AI ET)双胎率达66%(33/50),产犊率150%(45/30),显著提高了母牛的繁殖率.