厚朴种子处理技术及苗期生长规律研究

通过种子不同预处理试验,探讨了3种厚朴苗期生长特性,试验结果表明：在发芽持续时间的长短,发芽率,地径、苗高生长等方面,不同预处理技术措施之间、厚朴不同种类之间,均存在着极显著的差异。应根据厚朴的不同种类,选择适宜的种子预处理技术措施。凹叶厚朴、厚朴宜采用NK1、NG1,长喙厚朴宜采用NG1处理措施,进行种子的预处理,缩短发芽持续时间,出苗快而整齐,并有利苗木出土后的径、高生长。     

Comparing 1H‐NMR imaging and relaxation mapping of German white asparagus from five different cultivation sites

Nuclear magnetic resonance imaging (MRI) and complementary analytical techniques were used to address the question whether white asparagus (Asparagus officinalis L.) from different cultivation sites in Germany can be distinguished on the basis of NMR relaxation times. Five locations with contrasting soil properties and composition within the two asparagus‐cultivation regions Rhineland and Lower Franconia were selected for this project. For the first time, entire asparagus plants in their authentic soil environment excavated directly from the original harvest site were imaged by the NMR technique. However, they could not be employed for determination of relaxation times of spears in situ, because of artifacts arising from soil properties. Instead, market‐ready asparagus spears and freshly prepared spear saps from the five locations were used to acquire MRI data sets with different (slow and fast) imaging methods and to compute spatially resolved distributions (maps) of T₁, T₂, and T₂* relaxation times. Comparison of the data for pith, vascular tissue, and peel of the spears yielded only marginal, if any, differences in T₁, T₂, and T₂* between the specimens from the five locations, which were not sufficient for an unambiguous region‐related distinction. More pronounced differences in T₁, T₂, and T₂* were visible for the spear saps, allowing a clear distinction between individual specimens for each of the two cultivation regions. The results are discussed in terms of an application potential for correlated NMR relaxation times of tissue saps for future geographic authentication of agricultural produces.     

毛竹厚朴混交林对杉木林迹地土壤肥力的影响

文章通过对杉木林采伐迹地人工营造毛竹厚朴混交林土壤理化性质的分析研究,结果表明：在杉木林采伐迹地内人工营造毛竹厚朴混交林,不同坡位不同土层的pH值均有所升高。土壤有机质含量、土壤速效氮、速效磷及速效钾等养分含量也有所增加;表层土壤速效氮及速效磷含量增加幅度表现为中腹〉下腹〉上腹。由此可知,在杉木林采伐迹地内人工营造毛竹厚朴混交后,能较好的培肥土壤,改善土壤理化性质。     

厚朴种子园植株密度与母树生长关系初步研究

在厚朴(Magnolia officinalis)种子园建设中,通过不同的厚朴母树植株密度对比试验表明,厚朴母树植株密度与母树生长关系密切,厚朴母树植株密度直接影响着母树的胸径生长、树高生长和树冠生长,影响着厚朴母树的结果率和挂果量,从而影响着种子园的结果量。     

迷迭香叶中鼠尾草酸超声波辅助提取的优化

利用超声波辅助提取法提取迷迭香中的主要生物活性成分鼠尾草酸,分别研究了不同条件对鼠尾草酸提取率的影响.对5.0 g粉碎后的迷迭香叶子进行超声波辅助提取的结果表明,室温较适宜的超声波提取条件是:乙醇质量分数75%、3 g盐酸为酸稳定剂、超声波频率28 kHz、超声波功率200W、超声波提取时间40min、料液比(g:g)...     

萌芽条对厚朴幼林生长影响的研究

厚朴萌条对植株地上部分总生物量、鲜叶重影响不明显，但萌芽条分散养分水分，严重影响主干胸径生长、树冠生长，对主干的树高生长也有一定的影响，因此要防止萌条发生，发生萌条后，要及时“除早、除小、除了”     

檀木名实录

在论述檀木的来历、国产檀树种类以及进口的檀木树种后 ,考证了中国古代诗歌《诗经》中所说的檀 ,究竟是何树种。经查明 ,李时珍著《本草纲目》中记载的檀 ,似无定指。清 ,吴其濬著《植物名实图考》中定为黄檀 ,似论据不足。经多方考证 ,《诗经》中所说的檀应为青檀。     

核桃楸总黄酮的提取工艺

采用正交试验法研究核桃楸树叶、树皮和外果皮总黄酮的提取工艺,考察浸提液浓度、浸提温度、浸提时间、液料比、浸提次数等5个因素对核桃楸总黄酮提取量的影响。研究结果表明,核桃楸树叶总黄酮最佳提取工艺条件为:浸提液浓度60%乙醇,浸提温度60℃,浸提时间1h,浸提液体积与样品质量比15∶1,浸提次数4次。核桃楸树皮和核桃楸外果皮总黄酮最佳提取工艺条件为:浸提液浓度60%乙醇,浸提温度70℃,浸提时间1h,浸提液体积与样品质量比15∶1,浸提次数4次。     

超声波与赤霉素处理对大黄种子萌发及幼苗生长的影响

[目的]研究在日光温室栽培条件下,超声波和赤霉素对唐古特大黄种子萌发及幼苗生长的影响。[方法]采用超声波和赤霉素处理唐古特大黄种子,每日观察种子的萌发生长情况,在种子发芽后测定发芽率、平均根长、幼苗鲜重、根系鲜重、叶片面积,计算种子简化活力指数(G.S)。[结果]结果表明:大黄种子经超声波和赤霉素处理后,幼苗性状均有明显改善,幼苗的平均根长、鲜重、叶片面积增幅显著。优化综合农艺措施为:超声作用时间27.5~43.8 min,赤霉素浓度40.8~58.1 mg/kg。[结论]采用超声波和赤霉素处理唐古特大黄种子,对种子的萌发和幼苗生长都有一定的促进作用。     

几种生长调节剂对温室囤栽花椒萌芽和产量的影响

以50mg/L、100mg/L、150mg/L和200mg/L的细胞分裂素(KT)、6-苄基嘌呤(6-BA)与赤霉素(GA3)分别处理温室囤栽的花椒植株,研究其对萌芽和产量的影响.结果表明,3种试剂的不同浓度处理都促使花椒提前萌芽,各处理早期产量都明显高于对照.不同浓度的KT和GA3处理都使花椒芽总产量增加,以50mg/L GA3效果最佳.6-BA对产量的作用不稳定,不适宜应用.