两种微肥对油棉两熟棉田土壤的改良效果     

张允昔  鲁速明  高立明  张根培  张天玉  周宝珍 《江西棉花》2000,23(3):9-14

江西赣北棉区近十几年来普遍实行的是油棉两熟制棉田采取“板地”双移栽,棉地长期得不到翻耕,土壤状况恶化,施用“双效中微肥王”和“天丰生物固氮肥”对油棉两熟棉田土壤改良有较好的效果,且能增强棉纤维品质,提高产量。  相似文献   

脾虚症家兔胃、肠、肝、脾超微结构与微量元素含量   总被引：2，自引：0，他引：2  

魏彦明 《甘肃农业大学学报》1995,30(1):7-12

用能量色散ｘ射线分析仪（ＥＤＡＸ）、电镜对脾虚症模型家兔进行了超微结构和微量元素研究。结果为：扫描电镜下脾虚症模型家兔胃肠有不同程度的器质性变化，透射电镜下胃、肝、脾主要表现为线粒体肿胀，嵴大部分或全部破坏，有的甚至空泡变性，内质网脱落等超微结构变化。ＥＤＡＸ测定发现胃、肠、肝、脾组织中Ｃｕ、Ｆｅ、Ｚｎ３种元素量变明显。因此，认为脾虚时胃、肝、肠、脾组织线粒体的病理变化可作为其形态学依据，而微量元素Ｃｕ、Ｆｅ、Ｚｎ的变化或许是脾虚症发生的物质基础。  相似文献   

甘蓝型油菜polCMS微粉控制及遗传改良研究进展     

曾川  徐洪志  廖淑梅  张大琼  陈克富  彭涛  陈吉光 《西南农业学报》2007,20(1):163-167

目前生产上大量应用的甘蓝型油菜polCMS普遍存在育性不稳定、容易产生微粉的现象,对其研究和应用造成一定的影响。本文介绍了甘蓝型油菜polCMS的应用现状、存在的问题及解决方法,对其在今后的研究方向和发展前景进行了探讨。  相似文献   

日粮中不同藜麦添加水平对芦花鸡肉品质及微量元素的影响     

吴涛  江小帆  杨发荣  魏玉明  陈国顺  蔡原  焦婷  黄杰  赵生国 《浙江农业学报》2022,34(5):897

为研究日粮中不同藜麦添加水平对芦花鸡肉品质、肌肉营养成分及微量元素的影响,选取49日龄健康脱温芦花鸡150只,随机分为5组:不添加藜麦及其副产物的对照组(CK)和添加4%(Q4)、8%(Q8)、12%(Q12)的藜麦籽实(原粮)及12%藜麦糠(QS)的处理组,饲喂75 d后屠宰并取胸肌和腿肌样品,测定肉品质、营养成分和微量元素。结果表明,胸肌Q12组45 min肉色(亮度L^*、黄度b^*),Q4、QS组剪切力、蒸煮损失、滴水损失及各试验组的失水率均显著低于CK组(P<0.05);Q8、QS组红度a^*和QS组熟肉率均显著高于CK组(P<0.05);标准化评分表明Q12组胸肌肉品质最好;腿肌Q4、Q12组亮度L^*(45 min、24 h),Q12组黄度b^*(45 min)、滴水损失,Q4组剪切力,Q8、Q12、QS组蒸煮损失均显著低于CK组(P<0.05);而Q8、QS组45 min肉色(红度a^*)则显著高于CK组(P<0.05);标准化评分结果表明,Q8组腿肌肉品质最好;Q8组胸肌水分、Q4组腿肌粗灰分及各试验组胸肌、腿肌粗蛋白均显著高于CK组(P<0.05);胸肌Q12组铜元素含量,腿肌Q8组钙元素、Q12组锰元素含量均显著高于CK组(P<0.05)。由此可见,日粮中添加藜麦对芦花鸡肉品质、肌肉营养成分、微量元素有一定改善作用,且添加8%藜麦籽实对肉品质改善效果更佳。  相似文献   

硒与动物疾病防治     

武晓英  张春香  任有蛇  曹贵东  岳文斌 《中国畜牧兽医》2009,36(12):125-127

硒是人体和动物必需的微量元素之一,可增强机体对疾病的抵抗力,预防传染病的发生,硒缺乏则会引发多种疾病。笔者主要对硒在生物体内的存在形式、硒与免疫、硒与病毒感染和常见的缺硒性动物疾病进行了综述,为微量元素硒的研究和应用提供参考。  相似文献   

Effect of Dietary Trace Mineral Amino Acid Complexes on Hoof Wall and Sole Growth and Humoral Immune Function in Lactating Mares     

L.K. Warren  E.L. Johnson  M.B. Porter  K.R. Vineyard  C.K. Larson 《Journal of Equine Veterinary Science》2009

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农产品安全追溯系统的云计算技术性能提升设计     

陈联诚  胡月明  张飞扬  段文杰  余平祥 《农业工程学报》2013,29(24):268-274

农业生产及环境的信息采集是农业信息系统的重要环节,无线传感器网络以它的低成本、无线传输等优势广泛应用于农产品安全追溯的信息采集中。由于无线传感器网络长年不间断信息采集的积累,数据库的大信息量及网站用户高访问量将对网站服务器造成高负载的压力,这将导致网站的响应速度大大降低。采用高存储、高负载处理性能云计算计算技术,能提高网站访问的响应速度,提高网站的访问性能。该文设计了基于私有云的农产品安全追溯网站,研究了Hill-Climbing搜索算法优化云平台配置及MapReduce对大数据的并行计算,提高了私有云上的农产品安全追溯系统的性能。通过将网站系统迁移至私有云的前后的比较试验,说明将网站系统迁移至私有云后各方面性能得到较大提升,网站访问响应速度提高了33%。  相似文献   

Zinc bioavailability response curvature in wheat grains under incremental zinc applications     

Shahid Hussain  Muhammad Aamer Maqsood  Tariq Aziz  Shahzad Maqsood Ahmed Basra 《Archives of Agronomy and Soil Science》2013,59(7):1001-1016

Zinc application is generally recommended to enrich wheat grains with Zn; however, its influence on Zn bioavailability to humans has not received appreciable attention from scientists. In this pot experiment, seven Zn rates (from 0 to 18 mg kg^?1 soil) were applied to two wheat cultivars (Shafaq-2006 and Auqab-2000). Application of Zn significantly increased grain yield, grain Zn concentration and estimated Zn bioavailability, and significantly decreased grain phytate concentration and [phytate]:[Zn] ratio in wheat grains. The response of grain yield to Zn application was quadratic, whereas maximum grain yield was estimated to be achieved at 10.8 mg Zn kg^?1 soil for Shafaq-2006 and 7.4 mg Zn kg^?1 soil for Auqab-2000. These estimated Zn rates were suitable for increasing grain Zn concentration and Zn bioavailability (>2.9 mg Zn in 300 g grains) to optimum levels required for better human nutrition. Conclusively, Zn fertilization for Zn biofortification may be practiced on the bases of response curve studies aimed at maximizing grain yield and optimum Zn bioavailability. Moreover, additive Zn application progressively reduced the grain Fe concentration and increased the grain [phytate]:[Fe] ratio. However, a medium Zn application rate increased grain Ca concentration and decreased the grain [phytate]:[Ca] ratio. Hence, rate of Zn application for mineral biofortification needs to be carefully selected.  相似文献   

Trace element concentrations and background values in the arid soils of Hormozgan Province of southern Iran     

H. Abbaslou  F. Martin  A. Abtahi  F. Moore 《Archives of Agronomy and Soil Science》2013,59(8):1125-1143

Trace element concentrations in soils of arid regions of southern Iran are described to assess the concentration ranges of selected elements in a variety of soils and rocks, and to evaluate the potential bioavailability of trace elements in relation to soil properties. The study area was classified into three sub-regions consisting of (1) shale, gypsum, and limestone (western part), (2) igneous rocks and limestone (northern part), and (3) sandstone and limestone (eastern and northeastern part). The gained background values of trace elements were used for evaluating the quality and degree of contamination with native and also with anthropogenic elements of studied soils. Some soil samples indicated a significant enrichment for Pb and Ni, with an enrichment factor (EF) of around 6.0. Soils have only been cultivated for few years compared to hundreds and thousands of years for many agricultural soils; therefore, there has been less crop removal. Furthermore, soils are not highly weathered because they are in an arid climate with low precipitation, which results in a slow rate of weathering. However, slight elemental differences between soil horizons indicated that most soils are poorly developed and also represented the similarity of trace element contents between soils and parent materials.  相似文献   

在伊朗中部源于第三纪沉积物的土壤上影响坡缕石的发生因素研究     

S. HOJATI  H. KHADEMI  A. FAZ CANO  S. AYOUBI  A. LANDI 《土壤圈》2013,23(3):359-371

Limited information is available on the distribution and origin of palygorskite in soils developed on Tertiary sediments as the major soil parent materials in central Iran and other Middle Eastern countries. The objectives of this study were to determine the distribution and origin of palygorskite in soils developed on Tertiary sediments, and to identify the major soil properties that influence palygorskite distribution in the soils studied. Sixteen soil profiles developed on Paleocene, Eocene, Oligocene, Oligocene-Miocene, Miocene and Pliocene sediments were studied by X-ray diffraction analysis, transmission electron microscope, and scanning electron microscopy. Physicochemical characteristics of the soils and sediments including particle size distribution, pH, electrical conductivity, organic carbon, gypsum, carbonates, and soluble Si, Ca and Mg were determined. The principal component analysis was used to establish the relationships between palygorskite and the physicochemical characteristics of the soils studied. Results showed that clay fraction of all the soils in the study area was dominated by palygorskite. The highest amount of palygorskite was found in horizons where simultaneous accumulation of both carbonates and gypsum occurred. Limited amount of palygorskite was found in salic and calcic horizons. Palygorskite seemed to be of eolian origin in the surface horizon of all the soils. Using principal component analysis, the soluble Mg/Ca ratio, pH, soluble Si and gypsum contents were identified as the most important factors affecting the distribution and genesis of palygorskite in the soils studied. Results might suggest the neoformation of palygorskite by precipitation from solutions in which evaporation fluxes were very high. However, palygorskite in soils developed on Tertiary sediments in central Iran seems to be of both inherited and pedogenic origins.  相似文献