春小麦施用叶面肥对其产量的影响初探

试验结果表明:通过春小麦分蘖期及扬花期叶面喷施不同种类的叶面肥,对春小麦增产能起到提高产量的补助措施,通过试验,在春小麦扬花期喷施叶面肥可使小麦产量提高效能,与对照差相比有一定的增产效果,喷施叶面肥还可对春小麦起到提质保优的效果。     

农作物叶面施肥技术

近几年来,为了提高农作物产量,种植户不断增加向土壤中施入化肥的数量.然而,土壤施用化肥达到一定数量后,产量很难有明显提高,因此叶面肥的应用显得尤为重要,叶面肥的应用显得尤为重要.我市全面推广叶面施肥技术,并取得了较好的经济效益,该项技术的推广具有十分重要的意义.为此,叶面施肥须掌握以下几点。     

叶面肥“爱久收”在水稻上的肥效初探

进行了叶面肥"爱久收"在水稻大田应用试验示范,结果表明施用后水稻结实率提高、品质提升、产量增加。     

小麦那氏齐齐发增产效果试验初报

在崆峒区草峰镇进行的小麦那氏齐齐发增产效果试验结果表明:喷施处理的产量最高,为5815.5kg/hm2,较对照不喷不拌的增产32.9%;拌种处理的产量次之,为5127kg/hm2,较对照不喷不拌的增产17.1%。拌种的生育期为280天,比对照不喷不拌的提早成熟14天;喷施的生育期为284天,比对照不喷不拌的提早成熟10天。     

水稻宝在二晚上应用效果的试验报告

1试验概况随着我县有机肥料施用量的逐渐减少,化学肥料用量的增加。土壤肥力逐渐降低,导致二晚生长的中、后期、禾苗早衰现象逐渐加重,二晚的单产难以提高。为解决这一难题,近年来,我县农技人员在指导农民加强二晚肥水管理的同时,大力推广叶面肥在二晚后期上的应用,取得了一定的效果。同时为了验证叶面肥对二晚产量的增产效果,吉安县农技推广中心在粮食高产创建万亩示范片上,认真开     

水稻宝叶面肥在水稻上的试验初报

试验总结了水稻宝叶面肥在水稻上的应用效果,结果表明,水稻在喷施水稻宝后长势明显优于清水对照,双季稻全年结实率提高4%,667m2产量增加10%,667m2总增收205.8元,增产增收效果十分明显。     

多功能型贵西牌叶面肥对水稻产量和矿物质营养的影响

为探索多功能型贵西牌叶面肥,对水稻产量和矿物质营养的影响,2019年,我们在早、中、晚稻田,分别在水稻始穗期和乳熟期喷施多功能型贵西牌叶面肥[1]。试验结果表明:能显著提高单位面积产量,实际产量每667 m2增加50.93kg,增幅达12.32%;能显著提高大米多矿物质营养的含量,其中:硒达到了预包装食品营养标签通则的富含标准;硒、锌、铁达到了食品营养强化剂使用标准指标;硒、锌、钼、铬达到了中国居民膳食营养元素参考值的指标;还含有锶、锗、钛、钙、镁、硼、硫、硅等人体必需元素;能有效降低大米重金属含量,降镉幅度28.5%~92.6%。多矿物质营养米前景广阔。     

沼液/尿素/茶叶叶面肥喷施茶园对其产量影响效果研究

沼液/尿素/茶叶叶面肥喷施茶园对其产量影响效果研究。结果表明:处理A产量最高,产量98.9kg/667m2,比对照增产30kg/667m2,增产43.5%,居第一;其次,处理B,产量94.5kg/667m2,比对照增产25.6kg/667m2,增产37.1%,居第二;处理C产量最低,产量86.7kg/667m2,比对照增产17.8kg/667m2,增产25.8%,居第三。由此可看出,茶园管理叶面喷施沼液,茶树长势好,产量高,经济效果显著。     

基于炼镁回转窑煤粉制备与喷烧系统工艺研究

针对炼镁回转窑煤粉制备与喷烧系统,研究一种适合炼镁回转窑热工制度、适度提高窑内温度、拉长高温带长度、提高锻白质量和产量的工艺,突破传统炼镁业煤粉制备与喷烧系统工艺的弊端和局限性,实现炼镁回转窑煤粉制备与喷烧系统从制粉到喷烧的高效运行。     

阿帕奇AS720植保机

随着农业现代化的发展，农业生产已由粗放式、低科技向精细化、高科技化方向发展。近几年，高地隙自走式植保机械走俏东北市场，被广泛应用于作物播种后喷水、除草剂喷洒、喷洒杀虫抗病药物、喷施叶面肥等农作物田间管理的各个环节。阿帕奇AS720型高地隙自走式植保机，在2014中国国际农机展中亮相，该品牌植保机从美国整机进口，由哈尔滨圣达茜公司代理销售。     

Foliar micromorphology and its role in identification of the Apocynaceae taxa

In the present study, we evaluate the importance of foliar epidermal micromorphological characteristics of Apocyanaceae for accurate identification and classification. The species were collected from the University of Peshawar's main campus in the spring season to observe its qualitative and quantitative features. The length and width of guard cells, stomatal pore and subsidiary cells, trichomes, and crypts on both sides of the leaf were examined. Many species were observed to be hypostomatic. Plumeria rubra, Raulfia serpentine, Thevetia peruviana, Trachelospermum lucidum, Alstonia scholaris, and Catharanthus roseus demonstrated hypostomatic leaves. Nearly all the investigated species had anisocytic type of stomata only or in combination with other types of stomata on the upper and lower epidermis. Carissa carandas had anomocytic, anisocytic, and cyclocytic type of stomata on the upper epidermis, and the lower epidermis showed variations in stomatal type, such as anomocytic, stephanocytic, brachyparacytic, and hemiparacytic. Nerium oleander had no specific shape of stomata but showed stomatal crypts in which the stomata were enclosed inside many trichomes. The taxonomic key based on stomatal types, epidermal cells, stomatal index value, and statistical analysis, along with the variations in the epidermal cells, shows the link between the selected plants species, which will provide a baseline for future anatomical studies. This study highlights many undocumented micromorphological characteristics. The anatomical characteristics observed in this study will be helpful for taxonomic identification and species delimitation of the family Apocynaceae.     

Foliar epidermal anatomy of Lamiaceae with special emphasis on their trichomes diversity using scanning electron microscopy

Foliar epidermal features were based on the micromorphology of trichomes types, epidermal cells and stomatal complex. Even though each feature has its own limited taxonomic value but collectively these characteristics may be systematically important especially for the discrimination and identification of complex and problematic taxa. The systematics significance of nonglandular (NGTs) and glandular trichomes (GTs), stomatal complex and epidermal cells of Lamiaceous flora were analyzed by using the light microscopy (LM) and scanning electron microscopy (SEM). Variations on the observed epidermal appendages were divided into two basic types: glandular and nonglandular. GTs can be divided into subtypes: sessile capitate, subsessile capitate, and barrel and sunken. NGTs were also divided into subtypes: dendritic, stellate, conical, falcate, simple and 1–6 cells long having granulate and smooth surface ornamentation. NGTs were the most dominant features of both adaxial and abaxial surfaces of all observed taxa. Vitex negundo, Isodon rugosus, Colebrookea oppositifolia, and Marrubium vulgare could be demarked because of their twisted like appearance of NGTs at the abaxial surface. The Lamiaceae had both hypostomatic and amphistomatic leaf. Stomata were observed as diacytic, anisocytic, and anomocytic. Epidermal cells were found to be irregular, isodiametric, and rectangular. Based on these characters a taxonomic key was developed to delimit the closely related taxa. Distribution and morphology of the foliar epidermal trichomes through SEM highlight an important taxonomic tool used by the taxonomists as an aid to the correct identification of problematic Lamiaceae taxa.     

Foliar and stem epidermal anatomy of the tribe Cynoglosseae (Boraginaceae) and their taxonomic significance

Foliar and stem epidermal anatomical features of the tribe Cynoglosseae have been studied in detail for the taxonomic identification using light microscopy (LM) and scanning electron microscopic (SEM) techniques. A comparative study was conducted on different plant parts (leaf and stem epidermal anatomy) of 25 species belonging to eight genera of the tribe Cynoglosseae (Boraginaceae) collected from different phytogeographical regions of Iran for the first time. Different qualitative and quantitative characteristics were observed in detail using LM and SEM. Results showed that although generally the stem and leaf anatomical traits were similar, but some diagnostic features were examined for distinguishing the closely related genera in the tribe. The ratio of cortex/diameter of stem and phloem/xylem, the average row number of collenchyma, palisade and spongy cells, structure of trichomes, type of indumentum and palisade arrangement were found taxonomically important. The anatomical characters were statistically analyzed using cluster analysis and principal component analysis. The study found that stem and leaf eccentrics are variable in the genus but constant within species of the same genus. Most species had typical isobilateral leaves, but some showed an incipient dorsoventrally symmetry with a layer of abaxial palisade tissue. Eglandular trichomes were observed found in all the studied species, which were recognized based on structure and function. In present study some novel characters have been observed which are of great interest to the taxonomist for the correct identification some genera delimitations. The characters studied here are of less taxonomic value and delimitating at species level.     

Foliar epidermal anatomical characteristics of taxa of Iris subg. Scorpiris Spach (Iridaceae) from Turkey

Iris L. is one of the important genus of family Iridaceae, consist of 56 taxa naturally occurred in Turkey. The similarities and variations in the subgenus overlapping the taxonomic positions of the species in the subgenera and needs anatomical assessment especially by microscopic techniques. In this study, the taxonomic significance of leaf anatomical characters of 10 Iris subgenus Scorpiris taxa were studied in detail and the relationship among these taxa were evaluated using microscopy techniques. Fresh leaf samples of species were fixed in 70% alcohol solution for anatomical observation under microscope. Eleven different micromorphological features were statistically analyzed to delimit the species in subgenus. Based on morphological and anatomical similarities, we studied relationships among; (1) ssp. turcica, ssp. caucasica, I. nezahatiae and I. pseudocaucasica; (2) correlation between ssp. turcica and ssp. caucasica; (3) association of I. galatica, I. persica, ssp. margaretiae and ssp. stenophylla with each other; (4) relationship between ssp. stenophylla and ssp. margaretiae; and (5) relevance between I. aucheri and I. peshmeniana. Moreover, the taxonomy of subgenus Scorpiris has been discussed in detail with novel and diagnostic features based on micromorphological physiognomies. We found that four species in this study are endemic to Turkey, while seven are critically endangered geophytes in the country. The leaf anatomical characteristics of 10 taxa were divided into three groups. Main aim of this research was to study the taxonomy of the complex subgenus Scorpiris through microscopic techniques.     

Foliar epidermal anatomy of some selected wild edible fruits of Pakistan using light microscopy and scanning electron microscopy

The present study is focused on the detailed foliar epidermal anatomy of some selected wild edible fruits (WEFs) from Pakistan using light microscopy (LM) and scanning electron microscopy (SEM). The studied species are Ficus racemosa L., Solanum nigrum L., Capparis spinosa L., Physalis divaricata D.Don, Rosa moschata Herrm. and Ribes orientale Desf. collected from various localities of Pakistan. The objective of the present study is to investigate qualitative and quantitative anatomical characters for the identification and differentiation of collected wild edible fruits. The characters studied are shape and size of epidermal cells, anticlinal wall pattern, trichome type and shape, average number of stomata, length and width of stomata and pore. The detailed microscopic investigation and variations in the characters recorded have a key role in the determination and authentication of wild edible fruits. This study possesses great potential for plant taxonomists to further evaluate the species at molecular and genetic levels.     

叶切面最大厚度数值计算与应用

以叶切面最大厚度的数值计算方法为基础,探讨叶切面最大厚度计算的计算机实现,介绍叶切面厚度数值计算法的应用实例.     

Natural frequencies of vibration of a class of solids composed of layers of isotropic materials

In a recent paper, the Ritz method with simple algebraic polynomials as trial functions was used to obtain an eigenvalue equation for the free vibration of a class of homogeneous solids with cavities. The method presented is here extended to the study of a class of non-homogeneous solids, in which each solid is composed of a number of isotropic layers with different material properties. The Cartesian coordinate system is used to describe the geometry of the solid which is modelled by means of a segment bounded by the yz, zx and xy orthogonal coordinate planes and by two curved surfaces which are defined by fairly general polynomial expressions in the coordinates x, y and z. The surface representing the interface between two material layers in the solid is also described by a polynomial expression in the coordinates x, y and z. In order to demonstrate the accuracy of the approach, natural frequencies are given for both a two- and three-layered spherical shell and for a homogeneous hollow cylinder, as computed using the present approach, and are compared with those obtained using an exact solution. Results are then given for a number of two- and three-layered cylinders and, to demonstrate the versatility of the approach, natural frequencies are given for a five-layered cantilevered beam with a central circular hole as well as for a number of composite solids of more general shape.     

活塞销孔加工工艺的改进

我公司于８０年代末引进Aspera公司年产８０万台冰箱（冷柜）压缩机生产线及软件技术，在压缩机加工中，活塞销孔（如图１所示）的加工是难点之一。用镗床加工，质量一直难以达到要求，废品率很高。后来我们将Aspera公司的加工工艺即精镗后滚光改为精镗后用金刚石铰刀粗、精铰孔，由此解决了这个技术难题。（１）原意大利Aspera公司工艺简述其工艺流程为：钻６．５通孔→扩孔至７＋０．１→粗镗７．４７３＋０．０３６、圆柱度０．０１→精镗至７．９３５＋０．００６、圆柱度０．００２→滚光７．９３８＋０．００６、圆柱度０…     

盘丝极心偏对三爪自定心卡盘找标精度影响的分析

三爪自定心卡盘作为机床的主要附件,已有一百多年的发展历史,尽管目前随着数控技术的不断发展,越来越多地需求高速动力卡盘,但三爪自定心卡盘目前仍有一定的市场。 要保证卡盘可靠地夹紧工件,必须使其有可靠的夹持精度;要保持卡盘的精度,必须要严格控制各零部件公差及误差,如盘丝的极心偏。 　　极心偏是形成圆的渐开线的基圆圆心 (极心 )与盘丝内孔中心不同心所造成的偏差值。它对卡盘精度的影响分两种情况,一是卡爪夹持弧采用配磨,二是卡爪夹持弧采用单磨。本文主要探讨配磨时的影响。 　　卡爪夹持弧采用配磨,即每台卡盘整体…     

双丝杠驱动机构同步分析

介绍了双丝杠驱动机构工作原理,论述了双丝杠运动产生不同步的原因以及如何判定与解决同步问题。