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野生龙竹笋真空软包装加工工艺的研究 总被引:3,自引:0,他引:3
本文对云南特有的野生龙竹竹笋为加工原料,根据其特性,以保持野生龙竹竹笋风味,营养及色泽为原则,脱除了其苦涩味,防止了白色沉淀的析出,确定了采用常压杀菌进行竹笋软包装加工的工艺路线。其主要工艺参数是:在100℃条件下蒸煮30min,流水漂洗4h,装袋复煮15min,在真空度0.08~0.09 Mpa下抽真空,100℃杀菌90min,再经冷却、恒温检验、包装即可得到真空软包装野龙竹笋,所制成品达到长期保存的效果。 相似文献
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花哺鸡竹(Phyllostachys glabrata)原分布于浙江杭嘉湖平原一带,多系农家房前屋后零星栽植,是一种比较理想的笋用竹种,目前主要供鲜食。由于其酪氨酸含量比毛竹笋低,从而有利于罐藏而不至产生白色结晶,商品的外观性能较好,用它制成的竹笋罐头是一种低脂肪高纤维素的理想保健食品,深受消费者喜爱。 相似文献
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通过测定霍山县佛子岭镇大林汪家冲、佛子岭水库坝上、钱家院的土壤肥力和毛竹笋地径,分析研究了土壤肥力与毛竹笋地径的相关性。结果表明,土壤肥力对毛竹笋地径的生长势存在着显著的影响,毛竹笋地径与土壤有效磷含量之间存在显著的相关性。 相似文献
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毛竹冬笋的笋体剖析及营养成分的测定 总被引:14,自引:5,他引:9
我国每年生产大量笋罐头出口,获得一定外汇,促进了笋加工业的发展。但外商对笋产品的要求非常严格,只要幼嫩的笋尖(占笋体重量的25%),还有75%的剩余物,造成了笋资源的严重浪费。本文着眼于当前笋罐头加工对原料利用的现状,将笋体分割成五部分(笋尖、笋中部、笋基部、嫩笋衣、老笋衣)。分别测定其营养成分。结果表明,笋体各部位均含有丰富的蛋白质、氨基酸和矿质元素,是很好的食物资源。为竹笋加工综合利用提供依据。 相似文献
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为初步探讨高寒地区软枣猕猴桃新梢的越冬性,以“魁绿”为试材,测定露地栽培条件下不同新梢、新梢不同部位的枝条干物质含量、相对电导率及萌芽率、成枝率。结果表明:春梢干物质含量最高,夏梢的干物质含量中等,秋梢干物质含量最低,同一枝梢基部的干物质含量最高,顶部的干物质含量最低。秋梢顶部的相对电导率最高,其次秋梢中部、夏梢中部、夏梢顶部和春梢顶部的电导率中等,春梢中下部、夏梢基部和秋梢基部的相对电导率最低,呈现显著性差异。春梢中部的萌芽率最高,18%,春梢基部和秋梢顶部萌芽率为0%,其余部位的萌芽率中等,成枝率与萌芽率变化基本一致。综合评价新梢越冬性由强到弱为:春梢基部>夏梢基部>春梢中部>秋梢基部>春梢顶部≈夏梢中部≈夏梢顶部>秋梢中部>秋梢顶部。 相似文献
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We studied the effects of variation in shoot structure and needle morphology on the distributions of light and nitrogen within a Pacific silver fir (Abies amabilis (Dougl.) Forbes) canopy. Specifically, we investigated the role of morphological shade acclimation in the determination of resource use efficiency, which is claimed to be optimal when the distribution of nitrogen within the canopy is directly proportional to the distribution of intercepted photosynthetically active radiation (PAR). Shoots were collected from different heights in the crowns of trees representing four different size classes. A new method was developed to estimate seasonal light interceptance (SLI, intercepted PAR per unit needle area) of the shoots using a model for the directional distribution of above-canopy PAR, measurements of shoot silhouette area and canopy gap fraction in different directions. The ratio SLI/SLI(o), where the reference value SLI(o) represents the seasonal light interceptance of a spherical surface at the shoot location, was used to quantify the efficiency of light capture by a shoot. The ratio SLI/SLI(o) doubled from the top to the bottom of the canopy, mainly as a result of smaller internal shading in shade shoots than in sun shoots. Increased light-capturing efficiency of shade shoots implies that the difference in intercepted light by sun shoots versus shade shoots is much less than the decrease in available light from the upper to the lower canopy. For example, SLI of the five most sunlit shoots was only about 20 times greater than the SLI of the five most shaded shoots, whereas SLI(o) was 40 times greater for sun shoots than for shade shoots. Nitrogen content per unit needle area was about three times higher in sun needles than in shade needles. This variation, however, was not enough to produce proportionality between the amounts of nitrogen and intercepted PAR throughout the canopy. 相似文献
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套袋栽培对高节竹笋品质的影响 总被引:2,自引:0,他引:2
选择生长良好、均匀的高节竹林作为样地,在出笋高峰期标记即将出土的竹笋320株,其中160株用0.3mm厚(共3层,每层0.1mm)的黑色塑料袋遮光,另160株作为对照。随着竹笋的生长,依次从遮光笋及对照笋中采收地上部分高度接近5、10、15、20、25、30、35cm的笋,待预处理后作为样品进行营养成分的分析。结果表明,在竹笋地上部分高度10~30cm范围内,套袋能降低竹笋中单宁、维生素C、粗蛋白的含量;套袋栽培的竹笋中粗纤维含量比自然生长的竹笋中的粗纤维含量约低10%以上,氨基酸总量也高于自然生长的竹笋。 相似文献
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在闽北开展雷竹施肥试验,设置4种施肥处理:不施肥对照(处理1),施用氮磷钾复合肥(375kg/667m2,处理2),施用有机肥(腐熟的鸡粪5t/667m2,处理3),施用有机肥与氮磷钾复合肥(腐熟的鸡粪3t/667m2和氮磷钾复合肥150kg/667m2,处理4),分析不同施肥处理对雷竹叶片光合色素含量、光合特性、竹林生长、笋产量和品质等的影响,筛选出适合闽北雷竹经营的优化施肥方案。结果表明:不同施肥处理对雷竹叶片光合色素含量的影响未达到显著差异水平,但对竹林的光合特性、生长量、笋产量和笋营养物质含量均产生显著性差异影响;光合特性指标表现最优的是处理3和处理4,竹林生长效果最好的为处理2和处理4,竹笋产量和笋品质表现最优的是处理4和处理3。综合分析认为,最优施肥方案为处理4,即施用有机肥(腐熟的鸡粪)3t/667m2+氮磷钾复合肥150kg/667m2,该施肥处理可有效提升雷竹光合作用效率、促进竹林生长、增加竹笋产量及提高竹笋营养价值。 相似文献
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爬行卫矛下胚轴高频离体再生体系的建立(英文) 总被引:1,自引:0,他引:1
In this paper,a protocol for efficient shoot regeneration was successfully developed from hypocotyl explants of Euonymus fortunei var.radicans.Some factors that influenced shoot regeneration such as different combinations of plant growth regulators,types of medium and inoculation ways were studied in order to establish an efficient plant regeneration for transformation.The results showed that hypocotyl explants wero horizontally cultured on a basic medium composed of MS medium supplemented with 0.5 mg·L-1 BAP and 0.01 mg·L-1 NAA for induction and development of adventidous shoots.Ninety-four percent of regeneration frequency and 5.1 shoots per explants were obtmned after 30 days of culture.Regenerated shootsproliferated efficiently on a shoot multiplication medium consisting of MS medium containing 1.0 mg·L-1 BAP and 0.1 mg·L-1 NAA.Microshoots were rooted on a rooting medium made up of MS medium enriched with O.5 mg·L-1 IBA and O.5 mg·L-1IAA.After hardening,90% of plants were successfully established under greenhouse conditions.Histological observation revealed that shoot primordium originated from subepidermal cells of hypocotyl explants and directly developed into adventitious shoots without caHus formation. 相似文献