奶花芸豆种植密度与施肥量优化组合模式的研究   总被引：1，自引：0，他引：1  

刘建国  李俊华  翟孟茹  帕尼古丽 《西北农业学报》2005,14(4):57-60,80

采用正交回归旋转组合设计，研究了密度、氮（N）、磷（P2O5）、钾（K2O）施用量对奶花芸豆产量的影响，通过田间试验测定参数，利用计算机技术对试验数据进行处理，建立了产量函数模型，经计算机模拟寻优，筛选出了产量的最佳农艺措施组合方案。在试验条件下，当奶花芸豆栽培密度为150000株／hm^2，施氮量300kg／hm^2，施磷量200kg／hm^2，施钾量45kg／hm^2组合时，产量可达到3833．4kg／hm^2。  相似文献   

The Dynamic Firm–Territory Nexus of Taiwanese Informatics Industry Investments in China     

JINN‐YUH HSU 《Growth and change》2006,37(2):230-254

ABSTRACT This article explores the transformation of industrial systems in transborder investments made by Taiwanese information technology investors in China. It asks how cross‐border firms would operate in these new territories. The study found that, by and large, Taiwanese investors chose to respond strategically to the tensions in different ways at different stages. At first, regarding China as a land of cheap labor and land, they relocated the Taiwanese industrial system in such a way as to avoid disturbing the hosting regions. The situation changed as China’s market emerged confidently and opened gradually to foreign investors after the mid‐1990s. Exploring this huge new market in China provided a mandate for Taiwanese investors to prosper. They opened up their firm boundaries and added new departments of research, development, and marketing. They developed from being merely export subcontractors to producing their own brand‐name goods. In the most recent stage, Taiwanese investors have created networks to tap into local resources to support new activities. Echoing Yeung (2005) in a recent issue of this journal, this article argues that new investments change the developmental trajectories of the host regions and, at the same time, the regions imbued the incoming firms with their own regional stamp. From this perspective, location and localization decisions by cross‐strait firms may be regarded as geographically sensitive strategies whereby firms, as reflexive agents, protect and reinforce their competence through the evolution of a firm–territory nexus.  相似文献   

Surgical management and long-term outcome of dogs with cervical spondylomyelopathy with an anchored intervertebral titanium device     

JC King  GS Corfield  JG Mouatt  CY Kan  PA Moses 《Australian veterinary journal》2020,98(4):156-163

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中国土壤胶体研究Ⅲ.褐土胶体的矿物组成     

许冀泉 《土壤学报》1961,9(Z2):103-109

褐土广布我国华北地区,常与棕色森林土和浅色草甸土相伴发生^[1,5]。关于华北地区褐土的发生类型、形成环境、分布规律以及演变过程的研究,已有详细报告^[2],本文拟就粘土矿物组成方面阐明褐土的性质,特选出几个土壤剖面,分离其胶体(小于1微米)部分,进行矿物组成的研究。  相似文献   

THE EFFECT OF SEQUENCE SELECTION AND FIELD STRENGTH ON DETECTION OF OSTEOCHONDRAL DEFECTS IN THE METACARPOPHALANGEAL JOINT     

NATASHA M. WERPY  CHARLES P. HO  ANTHONY P. PEASE  CHRISTOPHER E. KAWCAK 《Veterinary radiology & ultrasound》2011,52(2):154-160

Six cadaver forelimbs were imaged in two high‐field magnetic resonance (MR) systems and one low‐field MR system following the creation of osteochondral defects on the palmar distal aspect of the third metacarpal bone. The following sequences were performed using all three systems: proton density (PD) turbo spin echo, T2^* gradient echo (GRE), T2‐weighted fast spin echo, and short tau inversion recovery. In addition, 3D T1 GRE sagittal standard and motion insensitive sequences were obtained using the low‐field system. PD fat saturated and 3D T1‐weighted spoiled GRE images with and without fat suppression were acquired with the high‐field systems. Lesions were measured and assigned a confidence score. The images obtained using high‐field systems (1.0 and 1.5 T) more accurately represented the osteochondral defects when compared with low‐field system (0.27 T) images. The largest difference was observed when evaluating articular cartilage defects, which were not identified on the low‐field images. Sequence selection affected the appearance of the lesions. On all systems the turbo and fast spin echo sequences more accurately represented the lesion size and shape when compared with the GRE sequences. The T1 GRE sequence is the only sequence that appears to allow visualization of the articular cartilage on the low‐field images, but is limited in providing adequate cartilage visualization. Confidence scores were greater on the high‐field systems when compared with the low‐field system.  相似文献   

Enhancement of viability of a probiotic Lactobacillus strain for poultry during freeze‐drying and storage using the response surface methodology     

Anahita KHORAMNIA  Norhani ABDULLAH  Siew Ling LIEW  Chin Chin SIEO  Kalavathy RAMASAMY  Yin Wan HO 《Animal Science Journal》2011,82(1):127-135

A rotatable central composite design (CCD) was used to study the effect of cryoprotectants (skim milk, sucrose and lactose) on the survival rate of a probiotic Lactobacillus strain, L. reuteri C10, for poultry, during freeze‐drying and storage. Using response surface methodology, a quadratic polynomial equation was obtained for response value by multiple regression analyses: Y = 8.59546 ? 0.01038 X₁ ? 0.09382 X₂ ? 0.07771 X₃ ? 0.054861 X₁² ? 0.04603X₃² ? 0.10938 X₁X₂. Based on the model predicted, sucrose exerted the strongest effect on the survival rate. At various combinations of cryoprotectants, the viability loss of the cells after freeze‐drying was reduced from 1.65 log colony forming units (CFU)/mL to 0.26–0.66 log CFU/mL. The estimated optimum combination for enhancing the survival rate of L. reuteri C10 was 19.5% skim milk, 1% sucrose and 9% lactose. Verification experiments confirmed the validity of the predicted model. The storage life of freeze‐dried L. reuteri C10 was markedly improved when cryoprotectants were used. At optimum combination of the cryoprotectants, the survival rates of freeze‐dried L. reuteri C10 stored at 4°C and 30°C for 6 months were 96.4% and 73.8%, respectively. Total viability loss of cells which were not protected by cryoprotectants occurred after 12 and 8 weeks of storage at 4°C and 30°C, respectively.  相似文献   

Ulcerative dermatitis associate with Uronema sp infection of farmed sand whiting Sillago ciliata     

PA GILL  RB 《Australian veterinary journal》1997,75(5):357-357

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The effects of antigenic competition on the efficacy of multivalent footrot vaccines     

CL SCHWARTZKOFF  JR EGERTON†  DJ STEWART‡  PR LEHRBACH§  TC ELLEMAN¶  PA HOYNE¶ 《Australian veterinary journal》1993,70(4):123-126

SUMMARY A multivalent footrot vaccine has been developed, containing pilus antigens produced in recombinant Pseudomonas aeruginosa and representing all nine serogroups of Dichelobacter (Bacteroides) nodosus commonly recognised in the field. The responses of sheep to the multivalent vaccine have been compared with those to monovalent vaccines representing only a single serogroup. Antigenie competition between serogroups occurred in sheep immunised with the multivalent formulation, but high levels of protection were still achieved. The study showed that in multivalent footrot vaccines, antigenic competition is predominantly due to the presence of a family of immunologically-related pilus antigens rather than to interference by extraneous proteins.  相似文献   

Bovine abortion caused by Listeria ivanovii     

PA GILL  JG BOULTON  GC FRASER  AE STEVENSON  LA REDDACLIFF 《Australian veterinary journal》1997,75(3):214-214

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Serological evidence of Neospora caninum in alpacas from eastern Australia          下载免费PDF全文

JS King  JL Vaughan  PA Windsor 《Australian veterinary journal》2015,93(7):259-261

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