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对贺兰山东麓产区平吉堡和玉泉营两个区域露地越冬的‘北红’葡萄成年树体1年生成熟枝条的水分含量、芽眼萌发率、主芽坏死情况等进行了调查。结果表明,两个区域的‘北红’葡萄一年生枝条总含水量和束缚水含量始终保持在较高水平,1~5节枝条的萌芽率大于95%,芽眼萌芽率也保持在89%以上,表现出较高的耐寒旱特性。调查发现,不同节位和区域芽眼的萌发率不同,平吉堡高节位(4芽、5芽)芽的萌发率大于低节位芽,而玉泉营呈相反的趋势。两个区域的‘北红’主芽均出现坏死情况,推测枝条营养状况是导致玉泉营枝条主芽坏死率高的主要原因。 相似文献
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香气是影响葡萄果实品质的重要性状,也是用于评价葡萄资源的重要依据。本试验以无香型品种‘红地球’为母本,草莓香型品种‘金星无核’为父本,连续两年测定并分析主要香气物质在亲本及杂交群体中的遗传规律。结果表明,酯类香气物质(水杨酸甲酯、邻苯二甲酸二甲酯、邻苯二甲酸二丁酯)及大马士酮香气物质表现为数量性状的遗传特征,分离趋势广泛,选择潜力大;酯类香气物质超低亲率显著高于超高亲率,在遗传效应上呈现典型的趋小性遗传特征;大马士酮香气物质超高亲率显著高于超低亲率,在遗传效应上呈现典型的趋大性遗传特征;苯乙醇在杂交后代中出现了分离的遗传表现,符合质量性状的遗传规律且两年表现出不同的遗传模式。 相似文献
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为了解释冷等离子体(CP)处理提高小麦次粉吸水率,采用动态水分吸附仪测定120W低压强射频氦或氧CP处理不同时间样品的水分吸着等温线。结果表明,Caurie方程能够拟合出等温线,其系数C0给出样品吸附水的密度,对吸附或解吸样品,随着同一功率氦或氧CP处理时间增加,吸附水的密度没有差异,而系数M0给出样品单分子层吸附水含量,对吸附或解吸样品,随着同一功率氦CP处理时间增加,单分子层水含量显著增加;对氧等离子体处理的样品,其吸附单分子层水含量随着处理时间增加则先减少后增加,而解吸单分子水含量随着处理时间增加呈现减少趋势。为了提高Caurie方程的拟合度,将M0修正为A+Bt(t是温度,A和B是常数)。分析修正Caurie方程的系数显示,随着120 W氦CP处理次粉时间(0~180 s)的增加,单分子层水、吸附水分子层数、结合水含量及水吸附表面积均呈现持续增加的趋势;对氧CP,这些指标在前60s处理呈现增加趋势,之后再延长处理时间则显示减少趋势。结果表明,与氧冷等离子体比较,高能量的氦冷等离子体改善了次粉蛋白质和多糖的亲水性,随着处理时间延长,这些大分子吸附水的表面积和层数、单分子层和结合水... 相似文献
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P. Cholewińska M. Iwaszkiewicz D. Łuczycka T. Wysoczański P. Nowakowski Katarzyna Czyż 《Journal of Natural Fibers》2020,17(9):1366-1377
ABSTRACT The aim of the study was to determine the electrical characteristics of wool derived from Polish Olkuska breed lambs. The comparison involved the features of wool both in its natural state and washed. The lambs were bathed on the 1st and 14th days of life. Electrical features were determined on the basis of impedance (Ω) and resistance (Ω) for wool samples from 16 lambs from twin litters. The wool samples were collected from the lambs on the 14th and 35th days of life. The results of blood morphology (RBC, WBC, HGB, HCT, PLT, MCV, MCH, MCHC) were used in order to evaluate the health status of both lambs subjected to bathing and control ones. The level of resistance and impedance at low frequencies in both cases demonstrated the step changes from 0 Ω to over 100 MΩ. This shows that wool has the features of a dielectric (insulator) in the frequency range from 10 Hz to 64 kHz. At a frequency of > 64 kHz, there was a linear trend of decline in the value from about 30 kΩ to the lowest values of resistance and impedance at a frequency of 1 MHz, and these values amounted to > 7.3 kΩ and > 4 kΩ, respectively. The effect of lamb bathing on the electrical properties of wool was demonstrated. These treatments resulted in an increase in resistance of wool from 35-day-old lambs bathed on the 14th day of life compared to the control group (maximum differences at the level of 40–50%). In turn, wool of lambs bathed on the 1st day of life had lower resistance than wool from lambs in the control group, on average 10–20% lower. No significant correlations were demonstrated between bathing treatment and lamb health status, except for higher levels of leukocytes in the 14-day-old lambs subject to bathing on the 1st day of life compared to the control, which amounted to 8.76 x 109/L, and 6.38 x 109/L (P ≤ 0.05), respectively. 相似文献
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基于MCCV-CARS-RF建立红提糖度和酸度的可见-近红外光谱无损检测方法 总被引:2,自引:0,他引:2
利用USB2000+微型光谱仪采集红提400~1?000?nm透过率光谱数据,并通过理化分析测得糖度和酸度值;利用SavitZky-Golay卷积平滑法对原始光谱进行预处理,结合蒙特卡罗交叉验证法剔除奇异点,再利用竞争自适应重加权采样法降维,最终建立随机森林预测模型。糖度预测模型的校正集相关系数和均方根误差分别为0.955?8和0.315?8;验证集相关系数和均方根误差为0.956?8和0.318?5。酸度预测模型的校正集相关系数和均方根误差分别是0.945?6和0.300?1;验证集相关系数和均方根误差为0.940?5和0.311?2。结果表明,该方法适用于红提糖度和酸度的快速无损检测,且具有较高的准确度。 相似文献
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目的探索萎凋程度对重庆工夫红茶品质形成的影响。方法以四川中小叶群体种为研究对象,分析比较了3个萎凋含水量:处理A(69.59%)、处理B(65.17%)、处理C(59.20%)萎凋叶红茶加工过程中色泽、多酚氧化酶(polyphenylene oxide, PPO)活性变化及对后续揉捻效果、生化成分、工夫红茶成茶品质形成的影响。结果随着萎凋水分的降低,萎凋叶L*, b*值呈下降的趋势, a*值呈上升的趋势, 4~6 h时均出现了与总体趋势相反的波动;加工过程中,各处理L*,b*值均呈下降的趋势,a*值在发酵前呈增高的趋势,干燥后值减小。成茶色泽L*a*b*值则均表现为处理A处理C处理B。加工过程中PPO活性呈先升后降的趋势,随萎凋程度的加重,高峰往后延迟且活性越强,处理C在发酵环节中活性最高。揉捻环节随着萎凋叶含水量的降低成条率越高,扁条率越低,细胞破碎率越高,处理C效果最好。内含物质随着萎凋叶含水量的减少,茶多酚先增后减,氨基酸先减后增,咖啡碱呈先减后增再减式起伏变化;水浸出物、可溶性糖差异不明显;成茶中处理C综合感官品质表现最好。结论萎凋叶含水量在60%左右时,有利于发挥四川中小叶群体种品种优势,加工出的工夫红茶品质良好。 相似文献