Variability and Correlation of Egg Qualitative Characteristics in Ducks of Shaoxing Breed

Birds＇ selection on increase of egg＇s mass resulted in changes in the ratio of egg components. In this regard, now selection on improvement of eggs＇ quali- ty became one of the most important directions of selection work. In this work, the interrelation among various qualitative characteristics of eggs of Shanxing egg ducks breed, their variability and an individual assessment of ducks-mothers was considered. Prospects of carrying out selection on increase of yolk ratio in egg were estimated.

Effects of Cordyceps Feed Additive on Production Performance and Egg Quality in Laying Ducks

[ Objective ] To investigate effects of Cordyceps feed additive on growth performance, laying rate and egg quality in laying ducks. [ Method] A total of 270 healthy laying ducks were randomly divided into throe groups, 90 ducks in each group. The ducks in the control group, group I and group II were fed common basal diet, basal diet containing 10 g/kg Cordyceps feed additive and basal diet containing 40 g/kg Cordyceps feed additive, respectively. The trial lasted for 28 d. During the whole trial, the ducks were weighed and their growth was observed at an interval of 7 d. The exterior quality and the nutritive indexes of duck eggs were determined. [ Result] After experiments, the body weights of ducks in the group I and group II were increased and higher than that of the control group. In the group I and group II, the laying rate was increased by 1.07% and 2.15%, respectively; the egg weight was increased by 3.95% and 4.16%, respectively; and the feed to egg ratio was decreased by 2.54% and 4.23%, respectively. The egg shape and eggshell thickness were consistent between the control group and experimental groups. In the group I and group II, the protein content of the duck eggs was increased by 5.55% and 17.15%, respectively; the cholesterol content was decreased by 11.79% and 42.14%, respectively; the IgY level was increased by 13.20% and 27.97%, respectively; and the lecithin content was increased by 5.13% and 11.69%, respectively. [Condusion] The Cordyceps feed additive can increase the body weight and laying rate of laying ducks and improve the quality of duck eggs.

Effects of Green Forage on Production Performance and Egg Quality of Suyou No.1 Laying Duck

[ Objective ] The paper was to study the effects of green forage on production performance and egg quality of laying ducks. [ Method] According to one- factor randomized complete experimental design, 200 healthy Suyou No. 1 laying ducks aged 200 days were randomly divided into five groups, four repeats each group, and each repeat contained 10 laying ducks. Parts of formulated feed in groups I - IV were replaced with different types and quantities of green forage, and group V was set as control. The trim lasted for 42 d. [ Result] Replacing parts of formulated feed with green forage could improve the production performance of laying ducks （P 〉 0.05 ）, and the economic benefits also increased. For egg quality, Haugh unit was improved （ P 〉 0.05 ） ; yolk color increased significantly ; compared to control group, yolk color was significantly increased in groups with 100 g chicory and 70 g clover （P 〈0.05 ）, and was extremely increased in the group with 100 g clover （P 〈0.01 ）. [ Conclusion] The group with 100 g chicory had the best effect on production performance of laying ducks, and the group with 100 g clover had the best coloring effect on yolk.

Desalted duck egg white nanogels as Pickering stabilizers for food-grade oil-in-water emulsion

Achieving the reuse of traditional egg by-products,salted duck egg whites(SEW),is an urgent problem to be solved.In this current work,we constructed a heat-induced gel-assisted desalination method for SEW.Subsequently,a top-down way was utilized to prepare desalted duck egg protein nanogels(DEPN)with uniformly distributed diameters and their application in the oil/water(O/W)interface system was explored.The results revealed that the increase of DEPN concentration could lower the droplet size,however,the size was negatively correlated with the oil phase fraction.Moreover,the effect of pH,ionic strength,and temperature on the emulsion stability demonstrated that the DEPN-stabilized emulsion displayed superior physical stability under different conditions.The addition of NaCl resulted in the significant decrease in droplet size of the emulsion,while further increasing the NaCl concentration,the droplet size did not decrease accordingly.Besides,heat-treatment and cold-treatment had little negative effect on the stability of the emulsion.Even if the droplet size of the emulsion increased at 80℃for 3 h,the morphology of the emulsion remained unchanged.Our study demonstrated DEPN had great potential as a stabilizer for food-grade Pickering emulsions.

Effect of Different Storage Periods on Egg Quality Traits of Ducks

The present study was conducted in each 20 eggs stored at 65 °F with 75% relative humidity, for a period of 5 weeks （T-I） 4 weeks （T-2）, 3 weeks （T-3）, 2 weeks （T-4） and 1 week （T-5） with broad end up. The external qualities of eggs like egg weight, length, width and volume were measured. After recording the external qualities the eggs were broken on a glass plate for studying the internal qualities. Storage period had no statistically significant effect on egg weight （g）, egg volume （%）, shell thickness （mm）, shell weight （g） and shell percentage. Egg weight values determined in this present study was between 61.10 and 64.91 g. The egg volume （%）, egg shell thickness （mm）, shell weight （g） and shell percentage for different storage periods were 87.46 and 98.52, 0.28 and 0.34 5.29 and 5.98; and 8.16 and 9.44 respectively. Yolk weight （g）, yolk percentage and albumen percentage was significantly affected （P 〈 0.01） by storage period and the values ranging between 32.20 and 36.40, 48.59 and 58.53 and 32.01 and 43.24 respectively. Storage period had no statistically significant effects on egg shape index and specific gravity. The storage periods on yolk index, yolk colour, albumen index and Haugh unit were statistically significant （P 〈 0.01）. Yolk index value decreased significantly when storage period was lengthened. This study concluded that yolk index, yolk colour, albumen index, albumen percentage and Haugh unit were decreased with increase in storage time.

鸭蛋及黑黄咸蛋壳外细菌多样性及PICRUSt基因功能预测分析

通过比较不同洁净程度鸭蛋及黑黄咸蛋(BSE)载菌数,发现重度脏污蛋(DE)壳外菌落总数对比无可视脏污蛋(CE)载菌量显著增大,BSE壳内及内容物载菌量大幅增加。进一步采用16S rDNA基因测序分析CE、DE与BSE的菌落种类和丰度差异,发现CE优势菌占比较高的为变形菌门(Proteobacteria)、厚壁菌门(Firmicutes)和放线菌门(Actinobacteria),分别为34.35%、27.25%和17.28%,拟杆菌门(Bacteroidetes)占比相对较少为8.29%;而DE优势菌占比较高的是变形菌门为89.01%,厚壁菌门和放线菌门分别占6.16%和3.98%;BSE优势菌门为变形菌门(76.50%)、拟杆菌门(8.00%)、放线菌门(6.76%)、厚壁菌门(5.43%)。DE组及BSE组变形菌门丰度显著增加。CE优势菌属为涅斯特捷科氏菌属(Nesterenkonia)(9.08%)、弯曲杆菌属(Campylobacter)(7.91%)、链球菌属(Streptococcus)(3.41%)和寡养单胞菌属(Stenotrophomonas)(2.92%)等;DE优势菌属为嗜冷杆菌(Psychrobacter)占86.01%,不动杆菌属(Acinetobacter)占2.20%;BSE优势菌属为罗尔斯通氏菌属(Ralstonia)(22.91%)、沙雷氏菌属(Serratia)(5.05%)和放线菌属(Actinomyces)(3.32%)等。菌落多样性聚类分析表明BSE优势微生物与DE接近,微生物表型分析结果表明BSE微生物以革兰氏阴性菌为主,且BSE具有较高的氧化胁迫耐受力和致病性,BSE对氧化型清洁剂有耐受力。通过微生物功能预测及代谢通路物种组成分析得出,DE在碳水化合物分解和脂质的运输和代谢氧化上均强于CE,更多的辅酶运输和代谢通路让DE的生化反应更加迅速,产生更多的次级代谢产物,导致鸭蛋品质发生改变,与BSE组在次级代谢物生物合成、转运和分解代谢通路上微生物最高这一检测结果相符。该研究结果为鸭蛋清洁生产提供一定理论支撑。

固相萃取-超高效液相色谱串联三重四级杆质谱法同时测定禽蛋中双酚A、双酚F和双酚S

目的建立液相色谱串联三重四级杆质谱法检测禽蛋中双酚A、双酚F和双酚S方法。方法样品采用乙腈提取,使用Oasis HLB固相萃取小柱净化,通过C18色谱柱分离,甲醇-水为流动相,采用电喷雾负离子模式和多反应监测模式检测,内标法定量。结果双酚A和双酚F在1.0~50μg/kg浓度范围呈线性关系(r≥0.999),检出限为0.3μg/kg,定量限为1.0μg/kg;双酚S在0.1~20μg/kg浓度范围呈线性关系(r≥0.999),检出限为0.05μg/kg,定量限为0.15μg/kg。利用该方法测定禽蛋中双酚A、双酚F和双酚S,加标回收率为86.7%~106.3%,相对标准偏差(RSD)为3.1%~7.2%。结论该方法快速便捷、准确稳定,可以满足禽蛋中双酚A、双酚S和双酚F的检测需求。

Performance of a water hyacinth(Eichhornia crassipes)system in the treatment of wastewater from a duck farm and the effects of using water hyacinth as duck feed

Nowadays, intensive breeding of poultry and livestock of large scale has made the treatment of its waste and wastewater an urgent environmental issue, which motivated this study. A wetland of 688 mz was constructed on an egg duck farm, and water hyacinth （Eichhornia crassipes） was chosen as an aquatic plant for the wetland and used as food for duck production. The objectives of this study were to test the role of water hyacinth in purifying nutrient-rich wastewater and its effects on the ducks＇ feed intake, egg laying performance and egg quality. This paper shows that the constructed wetland removed as much as 64.44% of chemical oxygen demand （COD）, 21.78% of total nitrogen （TN） and 23.02% of total phosphorus （TP）. Both dissolved oxygen （DO） and the transparency of the wastewater were remarkably improved, with its transparency 2.5 times higher than that of the untreated wastewater. After the ducks were fed with water hyacinth, the average daily feed intake and the egg-laying ratio in the test group were 5.86% and 9.79% higher, respectively, than in the control group; the differences were both significant at the 0.01 probability level. The egg weight in the test group was 2.36% higher than in the control group （P 〈 0.05）, but the feed conversion ratios were almost the same. The eggshell thickness and strength were among the egg qualities significantly increased in ducks fed with water hyacinth. We concluded that a water hyacinth system was effective for purifying wastewater from an intensive duck farm during the water hyacinth growing season, as harvested water hyacinth had an excellent performance as duck feed. We also discussed the limitations of the experiment.

基于梅尔谱图和改进ResNet34模型的鸭蛋裂纹识别算法

针对鸭蛋裂纹人工检测受主观性影响造成精度波动大等问题,利用ResNet34网络模型,提出1种基于梅尔谱图的鸭蛋裂纹识别算法。首先利用敲蛋装置收集敲蛋声音数据,再将音频转化成梅尔谱图,构建梅尔谱图数据集,然后搭建ResNet34模型,引入迁移学习机制训练模型,再通过Adam优化算法更新梯度,增加注意力机制模块并将卷积结构替换为深度可分离卷积以对网络模型进行改进,并调整参数进行优化,最后利用模型对鸭蛋裂纹进行识别。结果显示:改进的ResNet34DP_CA网络模型检测的平均准确率为92.4%,对比原始ResNet34网络模型,平均准确率提高5.5个百分点,参数量减少32%;对比其他网络模型VGG16、MobileNetv2和EfficientNet,平均准确率分别提高10.9、13.7、16.3个百分点,识别时间为21.5 ms。结果表明,所提出的基于梅尔谱图和改进ResNet34模型的鸭蛋裂纹识别算法,能够有效地对鸭蛋裂纹进行检测识别。

Profile Analysis of the Proteome of the Egg of the High Royal Jelly Producing Bees (Apis mellifera L.)

The protein composition of the egg development in the high royal jelly producing bees （Apis mellifera L.） was investigated. This pioneer study was to separate and quantify the proteins in the egg of the high royal jelly producing worker bees （Apis mellifera L.） by using two-dimensional gel electrophoresis along with their three-day development. The results showed that 160, 195, and 176 proteins, with a wide range of molecular weight （17-80 KDa） and relatively narrow scope of pI （4. 00-8.40） could be detected on day 1, day 2, and day 3, respectively, during the developmental process of the egg. Meanwhile 44 protein spots were constantly detected along with the egg development. Among them 36% were in the uptrend along with the egg development, 14% were in the downtrend, and 39% were of the largest expressed volume on day 2. In addition, the specific proteins were expressed on day 1, day 2, and day 3 （89, 77, and 80, respectively）. Besides the coexistent and specific proteins, 24 proteins were expressed on day 1 and day 2, but silenced on day 3, 49 proteins were expressed on day 2 and day 3, but silenced on day 1, only 3 proteins were expressed on day 1 and day 3, but silenced on day 2. The result indicates that egg development is a sequential and complex gene controlled process, where the eggs of day 2 express the most active proteins. The coexistent proteins suggest that it is conservative and indispensable for this event. These specific proteins suggest that the different developmental stage needs specific proteins to regulate it.

China's Dinosaur Egg Fossil Made its Way Home after Being Smuggled to America for 28 Years

On 28 February 2012, under the close judiciary of and diplomatic cooperation between the United States and China for five years, a fossilized nest containing 22 dinosaur eggs, which was smuggled to America, finally made its way home.

In Vivo Efficacy of Neuropeptide S on the Expression of Cytokines Indeced by Influenza A Virurs in Ducks

Neuropeptide S(NPS)is involved in severe pathological processes.Direct evidence showed NPS regulates the secretion of proinflammatory cytokines in pigs.This study investigated the effect of NPS on the secretion of inflammatory cytokines in ducks with H9N2 infection via intramuscular injection with NPS or NPS receptor(NPSR)antagonist.The ducks received 15 nM NPS or 10 nM NPSR antagonist in saline.Samples were collected to analyze the expression levels of IL-1β,IL-6,TNF-α,IFN-α,NPS,and the H9N2 gene NP by RT-PCR and real time RT-PCR;samples were fixed to observe the histopathological changes by hematoxylin-eosin staining.Serial blood samples were collected(every 30 min,starting 1 h before injections and lasting until 2 h after injections)to measure the serum levels of IL-1β,IL-6,TNF-α,and IFN-αby ELISA.Semiquantitative RT-PCR confirmed that the expression of NPS mRNA was increased in H9N2 infection group.Morphological data showed NPS treatment could reverse the pathological changes in the duck bursa induced by H9N2 infection.Both the results of real time quantitative RT-PCR and ELISA methods showed NPS and NPSR antagonist treatments could significantly regulate the expression of IFN-α,but not of IL-1β,IL-6 and TNF-α;meanwhile,the levels of increased IFN-α and decreased NP were further prompted by NPS,and NPSR antagonist revered.Conclusion,NPS is involved in the innate immunity response to H9N2 infection via the IFN-αpathway in ducks in vivo.These results indicate NPS affects the immune homeostasis and provides an alternative for anti-H9N2 drugs.

Aqua Forestry and Duck Integration in Tamil Nadu, India

A study was taken up on integration of ducks in private and community fish ponds in Tami Nadu. A total of 50 ha of land under private holding and community water bodies each were selected to implement this model. Ducks were integrated based on the water spread area. Fodder, fruit, nuts, fuel, timber trees and vegetables were grown on pond bunds. Control units of fish ponds of farmers holding without integration of ducks also were taken up. A control unit also was established in the university farm land with and without integration of ducks. In private water bodies coconut trees and banana fetched additional revenue. During the first year the average fish production from the private land model was 1,552 kg and 1,731 kg for the first and second year respectively per Hectare. In community ponds the yields were 1,610 and 1,337 kg for the first and second year respectively. In field control units there was no increase in fish yield over the years. In private water bodies the beneficiaries got egg yield of 148 and 90 eggs and community water bodies 144 and 127 eggs per bird were obtained during first and second year resoectivelv.

不同发育虫态扁谷盗属对S-烯虫脂耐受性研究

扁谷盗属是一类世界性重要的储藏物害虫,由于抗药性强、替代技术少、药剂残留等问题,该类虫害防治面临严峻挑战。保幼激素类似物(JHA)s-烯虫酯,具有良好的安全性和对多种仓储害虫有效性,研究选取扁谷盗属为研究对象,旨在了解害虫不同发育阶段对其耐药性表达。实验结果表明,成虫对s-烯虫酯耐受性最高,其次为卵和幼虫,F1代中蛹的耐受性与幼虫相当。在不同质量浓度下,长角扁谷盗最敏感,土耳其扁谷盗最耐受。当质量浓度达到30 mg/L及以上,锈赤扁谷盗和长角扁谷盗孵化率均小于50%,而土耳其扁谷盗质量浓度则需要80 mg/L。在幼虫期,施用5 mg/kg s-烯虫酯即可使3种扁谷盗死亡率超过50%。虽然在实验期间,s-烯虫酯未完全抑制扁谷盗属F1代的产生,但即使在0.5 mg/kg低质量分数下,F1代中成虫数量也可显著减少。因此,s-烯虫酯对这3个虫种效果显著,是储粮害虫综合防治的潜在手段。

基于改进YOLOv5l的轻量化鸭蛋裂纹检测算法

鸭蛋裂纹检测技术对于禽蛋加工工厂实现智能化蛋品检测、分级具有重要意义。该研究针对鸭蛋裂纹检测流程复杂、计算量大、模型尺寸大等问题,提出了一种基于改进YOLOv5l(you only look once version5 large)的轻量裂纹检测算法,通过在黑暗条件下使用LED灯照射鸭蛋,根据裂纹蛋壳与完好蛋壳透光性不同产生的图像差异进行检测。通过在YOLOv5中引入Ghost_conv模块,大大减少了模型的浮点计算量和参数量,并在模型的骨干网络中加入ECA(efficient channel attention)注意力机制以及使用多尺度特征融合方法 BIFPN(bi-directional feature pyramid network),增加模型对有效信息的关注度,以提高算法检测精度。同时使用CIoU与α-IoU损失函数融合后替代YOLOv5原始GIoU函数加速回归预测。利用自建的鸭蛋裂纹数据集验证改进后模型的性能,结果表明,本研究提出的改进YOLOv5l网络模型检测精准率为93.8%,与原始YOLOv5l模型相比,检测精度提高了6.3个百分点,参数量和浮点计算量分别减少了30.6%、39.4%。检测帧速率为28.954帧/s,较原始YOLOv5l模型仅下降3.824帧/s。与其他的目标检测常用网络SSD(single shot multibox detector)、YOLOv4、Faster-RCNN(faster region convolutional neural networks)相比,精度分别提高了13.1、12.5、8.2个百分点。本研究提出的方法能够在低硬件资源条件下进行高精度检测,可为实际场景应用提供解决方案和技术支持。

不同因素对咸鸭蛋“黑黄”产生的影响

为分析影响盐腌鸭蛋中“黑黄”产生的因素,本实验通过色度值和金属离子含量测定以及蛋白质组学分析,对比“黑黄”咸蛋和正常咸蛋不同部位的差异,初步确定与“黑黄”形成有关的因素,再通过单因素试验进一步研究这些因素对黑黄形成程度和速率的影响。结果表明,Fe、Cu含量越高,蛋黄色度值越小,“黑黄”越黑,推测卵黄高磷蛋白中Fe2+与S2-结合形成的硫化物是使蛋黄变黑的原因,半胱氨酸的降解脱硫是蛋黄产硫的主要原因。微生物浓度、温度、pH值是影响黑黄产生的主要因素,鸭蛋载菌量和腌制温度越高,黑黄率越高;pH7.0~8.0范围内均可产生H2S,其中pH7.5时产气速率最快。综上,可以推测“黑黄”是由蛋黄内硫元素与铁元素之间的变色反应造成,腌制过程中的温度、pH值以及鸭蛋本身的载菌量对“黑黄”现象均有较大影响。

咸鸭蛋黄品质劣化分析与调控技术的研究进展

鸭蛋经食盐腌制加工成的咸蛋,是我国传统蛋制品之一,蛋黄质量好坏常被用来评价咸蛋的品质。鸭蛋盐渍过程中蛋黄黑化和泥化是影响咸蛋品质的劣化现象,该研究从蛋黄颜色劣变造成的蛋黄黑化现象和质地过度软化劣变造成的蛋黄泥化现象两个方面介绍了蛋品加工过程中品质劣变的表征及影响因素,重点综述了类似的蛋、肉、蔬菜等食品硫化致黑和氧化致软两种品质劣变的机制和控制技术及其效果。为鸭蛋加工的标准化、工业化以及安全化生产咸蛋提供理论支持。

减菌处理对鸭蛋壳内外菌群组成及功能的影响

该文探索了减菌处理对鸭蛋壳内外菌落组成及咸蛋黑黄率的影响。对鸭蛋使用不同熏蒸清洗剂进行熏蒸、清洗及不同温度下临储,比较减菌前后鸭蛋壳内外菌落总数变化,基于16S rRNA基因测序和PICRUSt基因功能预测研究减菌处理对鸭蛋壳外菌群的影响,在35℃下泥包法腌制咸蛋,统计咸蛋黑黄率。结果表明,熏蒸处理可以显著抑制壳外菌落向壳内迁移,有效控制壳内菌落总数,熏蒸两次效果优于一次;清洗处理可将壳外菌落总数降低至检测限以下;低温储藏可在7 d内控制壳内外菌落总数增殖。联合熏蒸-清洗-低温的减菌处理可以显著降低壳内外菌落总数,抑制其迁移,控制壳内菌落总数。16S rRNA基因测序发现减菌处理可以显著减少壳外变形菌门和嗜冷杆菌属比例,PICRUSt基因功能预测发现减菌处理后微生物在脂质氧化通路、氨基酸转运和代谢通路上的活跃度显著降低。减菌后咸蛋蛋黄黑化率显著降低,证明了减菌处理能有效减少壳外菌群数以及抑制蛋黄黑黄的发生,表明鸭蛋加工前减菌的重要性和必要性。

王不留行黄酮苷对蛋鸭生产性能、蛋品质及血清抗氧化指标的影响

文章旨在探究王不留行黄酮苷对蛋鸭生产性能、蛋品质及血清抗氧化指标的影响,本试验将800只150日龄健康的绍兴蛋鸭随机分为4组,每组10个重复,每个重复20只,试验为期90 d,试验日粮在基础日粮中分别添加0、3、6和12 mg/kg王不留行黄酮苷。试验结果显示:与对照组相比,添加3、6和12 mg/kg王不留行黄酮苷组的蛋鸭产蛋率分别提高0.21%(P>0.05)、4.70%(P<0.05)和3.36%(P<0.05);料蛋比分别提高0.75%(P>0.05)、5.09%(P<0.05)和5.99%(P<0.05);日产蛋重分别提高0.65%(P>0.05)、5.05%(P<0.05)和6.56%(P<0.05);此外,王不留行黄酮苷对蛋鸭平均蛋重和采食量均无显著影响(P>0.05)。与对照组相比,添加6和12 mg/kg的王不留行黄酮苷显著提高鸭蛋的蛋黄颜色和哈氏单位(P<0.05),以及鸭蛋中蛋氨酸、苏氨酸含量(P<0.05);添加3 mg/kg的王不留行黄酮苷时,上述指标提高不显著(P>0.05);此外,王不留行黄酮苷对鸭蛋蛋壳厚度、强度、蛋形指数以及鸭蛋中赖氨酸、苯丙氨酸、异亮氨酸、亮氨酸和缬氨酸含量均无显著影响(P>0.05)。与对照组相比,补充6和12 mg/kg的王不留行黄酮苷显著提高蛋鸭血清SOD和CAT活性(P<0.05),并显著降低蛋鸭血清H2O2含量(P<0.05),而3 mg/kg添加组对上述指标影响效果不显著(P>0.05);3个添加组均能显著降低蛋鸭血清MDA含量(P<0.05);此外,王不留行黄酮苷对蛋鸭血清GSH-Px和T-AOC活性均无显著影响(P>0.05)。结论:王不留行黄酮苷能显著提高蛋鸭抗氧化能力、改善蛋品质、提高生产性能,本试验条件下,其最适添加量为6 mg/kg。

基于透射图像的高压脉动腌制咸鸭蛋含盐量检测

含盐量是衡量咸鸭蛋品质的重要指标。为了利用机器视觉技术实现高压脉动腌制咸鸭蛋含盐量的无损检测。该研究采用工业相机和透射光源搭建咸鸭蛋的透射图像采集装置。采用图像整体特征和长轴截面光强度特征两种特征提取方法,利用多元线性回归、支持向量机回归两种算法,建立对蛋清、蛋黄及全蛋含盐量以及蛋黄指数的定量预测模型。结果表明,随着咸鸭蛋腌制时间的增加,其透光性显著提高。同时,透射图像蛋黄的所在视野区域会随着含盐量的增加而呈现规律性的变化。基于图像整体特征建立的蛋清、蛋黄、全蛋含盐量模型较优,在蛋黄指数预测下基于长轴截面光强度特征所建模型较优。其中,基于图像整体特征所建立的蛋黄含盐量支持向量机回归(support vector regression,SVR)模型最优,测试集相关系数(test set correlation coefficient,Rp)、测试集均方根误差(root mean square error of prediction,RMSEp)、相对分析误差(residual predictive deviation,RPD)分别达到0.8460、0.3416、1.898;基于长轴截面光强度特征建立的蛋黄指数多元线性回归(multiple linear regression,MLR)模型最优,测试集相关系数Rp、均方根误差RMSEp、相对分析误差RPD分别为0.8318、0.0743、1.916。该研究结果为咸鸭蛋含盐量的快速检测提供理论依据和技术支持。