富含GABA和花色苷的发芽紫糙米加工工艺研究

紫糙米口感较粗糙,营养素有进一步提升空间.本研究以紫米稻谷为原料,研究浸泡及培养工艺,制备富含 γ-氨基丁酸(GABA)和花色苷的发芽紫糙米,改善了口感.单因素实验结果表明,浸泡温度、浸泡时间、培养温度和培养时间对发芽紫糙米中GABA和花色苷含量有显著影响,再以GABA和花色苷含量综合评分为指标,经正交实验得到发芽工艺...     

适合桑枝栽培猴头菇优良菌株筛选试验

通过不同猴头菇菌株栽培试验,获得适合桑枝栽培猴头菇优良菌株,为利用桑枝高产栽培猴头菇提供依据。选择6个猴头菇菌株,分别进行菌丝生长和桑枝屑栽培出菇试验,通过分析菌丝生长和出菇情况,筛选出适合本地利用桑枝栽培的猴头菇优良菌株。在供试的6个菌株中,筛选出适合利用桑枝栽培猴头菇的菌株为H-4。     

盆景跌枝类型及其在造型中的功能分析

通过研究大量盆景的特殊枝型,分析和归纳出“跌枝”在盆景构图中的类型、运用特点、功能作用等,并进一步完善其定义,为增强盆景观赏性提供客观、有效的建议,为促进我国盆景艺术发展提供参考。     

翻埋与覆盖林木枝条对干旱区沙化土壤及紫花苜蓿根系丛枝菌根真菌的影响

沙化是全球干旱半干旱地区土壤退化的主要类型之一，而该地区的生态防护林、农田防护林及城市森林的林木修剪物为沙化土壤的改良提供了丰富的资源。本研究以宁夏易得的杨树枝条为材料，设置了覆盖（M）、翻埋（W）、翻埋+覆盖（WB）及无任何枝条添加的对照（CK）4种处理，测定了土壤理化性质、土壤酶活性、紫花苜蓿地上生物量及菌根侵染率等指标，并利用Illumina Miseq高通量测序技术研究了土壤与根系丛枝菌根（AM）真菌群落结构，分析了影响AM真菌侵染率及群落结构的主要驱动因子。研究结果表明，翻埋与覆盖处理均不同程度改善了土壤性质，提高了紫花苜蓿地上生物量，但总体以WB处理效果较佳；相比CK，处理WB还显著提高了紫花苜蓿根系总侵染率、丛枝侵染率、菌丝侵染率、泡囊侵染率及土壤孢子数（P<0.05），同时亦显著提高了根系AM真菌Chao1和ACE指数，但所有林木枝条施用方式对土壤α多样性影响均不显著（P>0.05）。此外，NMDS和PERMANOVA分析结果显示，处理WB对土壤与根系AM真菌群落结构存在显著响应（P<0.05）。相关分析和dbRDA分析结果进一步表明，AM真菌的侵染状...     

Lumbar erector spinae plane block: an anatomical and dye distribution evaluation of two ultrasound-guided approaches in canine cadavers

ObjectiveTo examine the anatomy of the lumbar epaxial region and to describe two different ultrasound-guided approaches for the lumbar erector spinae plane (ESP) block in dogs.Study designAn anatomical and experimental cadaver study.AnimalsA group of 19 canine cadavers.MethodsThe anatomy was described following dissection of two cadavers. Bilateral ultrasound-guided ESP injections with 0.4 mL kg^–1 of contrast dye were performed in 17 adult Beagle cadavers using either transversal (TVS) or parasagittal (PST) approaches. Computed tomography was performed to measure the total length of the contrast dye column and the epidural, intravascular, hypaxial and intra-abdominal migration. Dissections were performed to assess the spread of the contrast dye and to determine the degree of staining of the dorsal branches of the spinal nerves (DBSN). Mann–Whitney U and chi-square tests were used to compare data between groups.ResultsUsing both techniques, the contrast dye was observed within the ESP compartment. There was no difference in the total length of the contrast dye column between TVS and PST approaches (p = 0.056). Using the TVS approach, multisegmental staining of the DBSN was visible with 100% (17/17) of injections, while complete staining of the DBSN was achieved at 94% of the injection sites. Using the PST approach, these values were 29% (5/17) and 23% (4/17), respectively. The TVS approach stained more DBSN than the PST approach (p = 0.001), with a median (range) of 2 (2–3) versus 0 (0–3) DBSN, respectively. Using the TVS approach, epidural and intravascular migration were present in 2/17 (p = 0.485) and 3/17 (p = 0.227) injections, respectively.Conclusions and clinical relevanceBoth ultrasound-guided approaches resulted in a spread of the contrast dye within the ESP compartment. Although there were no differences in the total length of the contrast dye column, the TVS approach was superior to the PST approach in staining DBSN.     

Effects of rodent-induced disturbance on eco-physiological traits of Haloxylon ammodendron in the Gurbantunggut Desert,Xinjiang, China

Disturbance by rodents alters the morphologies and nutrients of plants as well as the physical-chemical properties of the soils. Changes in plants are considered to be mechanisms of defense against the disturbance by rodents. Rodents gnaw on the assimilating branches of Haloxylon ammodendron(CA Mey.) Bunge and burrow under the bushes in the desert ecosystems of Xinjiang, China. However, eco-physiological responses of different age groups of H. ammodendron to the disturbance by rodents are not well understood. In this study, soil physical-chemical properties under the shrubs and the above-ground morphological, physiological and biochemical features of assimilating branches of H. ammodendron of different age groups(i.e., young, 30-100 cm; middle-aged, 100-200 cm; and mature, 200 cm) in burrowed and non-burrowed(control) areas were studied in 2018. We found that disturbance by rodents significantly increased the crown width and total branching rates of young and middle-aged H. ammodendron. Photosynthetic pigment contents of assimilating branches of H. ammodendron were significantly reduced under the disturbance by rodents. In term of plant nutrients, the main differences among different age groups of H. ammodendron under the disturbance by rodents occurred in the total soluble sugar and reducing sugar contents that decreased in young plants, increased in middle-aged plants, and did not affect in mature plants. Crude protein and phosphorus contents significantly increased, while crude fiber and calcium contents significantly decreased in young plants. Crude fat and calcium contents significantly decreased in middle-aged plants. Soil organic matter(SOM), total nitrogen(TN), available nitrogen(AN) and available potassium(AK) contents in the topsoil(0–20 cm), which are conducive to forming 'fertile islands' ', also increased under the disturbance by rodents. In particular, soil AN and AK were the major factors affecting the above-ground morphological characteristics of H. ammodendron in burrowed areas. Overall, the response and defense strategies of H. ammodendron to the disturbance by rodents differed among different age groups, and the effect of the disturbance by rodents on H. ammodendron gradually weakened with the increasing plant age.     

枝桠施工技术在河流湿地治理中的应用

传统的河流治理技术忽略了河流的生态特性,结果导致河流生态系统发生严重破坏。概述了枝桠施工技术的种类及其特点,结合唐山南湖公园生态堤岸设计实践,探讨了枝桠施工技术在河流湿地治理中的应用。     

关于茶树修剪枝再利用的探讨

本文分类总结了目前生产上对茶树修剪枝的再利用现状,分析了茶树修剪枝再利用过程中存在的一些问题,同时就今后茶树修剪枝再利用的对策和注意事项进行了探讨。     

临沂地区垂枝型木本植物种质资源调查与应用研究

为了对临沂地区的生态环境和园林绿化建设提供参考,对临沂地区主要垂枝型木本植物进行实地调查。结果表明,临沂地区园林中应用的垂枝型木本植物共有10种,隶属于7科9属,其中乔木2种、灌木8种。在调查研究的基础上,收集并保存优良垂枝型木本植物10种,并开展垂枝型木本植物种质资源评价和应用研究。     

冬小麦根系各级分枝形成及其解剖结构研究

从池栽、盆栽和大田取根,系统观察高产小麦各级分枝根形成和解剖结构.结果表明,小麦根系经由分枝,初生根可达6级,次生根可达5级.各级分枝根解剖结构的差异主要是皮层细胞层数和中柱维管束数目的不同.小麦分蘖期以后继续发生的根,如果土壤条件适宜,植株生长健壮,其根皮层可一直维持正常状态到抽穗期,抽穗后根皮层将逐渐萎缩.高