中华槭花粉活力探究

以中华槭为研究对象,研究了中华槭花粉离体培养萌发最佳测定时间,中华槭花粉活力快速测定的方法,蔗糖、硼酸、氯化钙浓度以及不同贮藏温度(室温、4℃、-20℃)对中华槭花粉活力的影响。试验结果表明:中华槭花粉离体培养16h后,再进行其花粉活力的测定较为适宜;用离体培养萌发法测定的花粉活力,最接近于中华槭花粉的真实活力。适于中华槭花粉萌发的蔗糖、硼酸、氯化钙浓度分别为:100g/L、50mg/L、50mg/L。中华槭花粉在4℃下可以存活60d,在-20℃下可以保存120d,在室温下仅可以存活7d。     

福建生态公益林监测技术研究

在总结福建省生态公益林建设经验和森林资源监测技术实践的基础上,提出了生态公益林监测的“三个工作体系,三个工作层面,三个工作系统”的总体思路。并从监测技术方法、数据更新模型、先进工作手段和实施管理系统等方面,对生态公益林监测技术进行了探讨。     

包装袋对核桃青果贮藏效果对比试验

为了探明不同包装袋对青皮核桃在冷藏期间贮藏效果的影响,采用气调保鲜袋PE40、PE50硅窗袋g50、g55、g60、g656种包装袋。以清香青果为试材研究了不同贮藏期中贮藏效果对比试验。结果表明:与普通硅窗袋相比核桃青果贮藏宜采用自发气调袋,在PE40~PE50,建议选择P40袋。     

松针叶绿素－胡萝卜素软膏稳定性的研究

松针叶绿素－胡萝卜素软膏中含有β－胡萝卜素、维生素Ｅ、叶绿素等生物活性物质，这些物质的不足之处是稳定性较差．试验结果表明，松针叶绿素－胡萝卜素软膏在室、温避光条件下贮藏１年，不同品种产品中生物活性物质降低幅度是不同的．马尾松针叶叶绿素－胡萝卜素软膏产品中生物活性物质降低幅度分别为（％）：β－胡萝卜素１２．４，维生素Ｅ９．９，叶绿素１０．４；赤松针叶叶绿素－胡萝卜素软膏产品中生物活性物质降低幅度分别为（％）：β－胡萝卜素２５，１，维生素Ｅ．１６．４，叶绿素１２．８；樟子松针叶叶绿素－胡萝卜素软膏产品中生物活性物质降低幅度分别为（％）：β－胡萝卜素１４．８，维生素Ｅ１２．３，叶绿素２４．０．马尾松针叶叶绿素－胡萝卜素软膏产品，在室温避光条件下贮藏１５年，β－胡萝卜素损失４８．１％，维生素Ｅ损失１８．９％，叶绿素损失２９．６％．     

Germination pretreatment and storage behavior of Terminalia laxiflora seed

Terminalia laxiflora Engl.&Diels.is an important indigenous and multi-purpose species in Ethiopia.However threatened due to low germination and its storage behavior is unknown.In this study,we aimed to(1)test pretreatments for breaking the dormancy of T.laxiflora seed and(2)determine its storage behavior.Seeds were subjected to four pretreatments such as soaking,scarification,high-temperature,and control.Experiments were done before storage and after 2 years of dry storage at cold temperature(-10℃)based on randomized design with four replicates.The first round of experimental results showed that T.laxiflora seeds with high temperature treatments at 78℃for 10 min showed significantly higher germination percentage(80%).In the second round experiment,high-temperature treatment at 78℃for15 min,cold water soaking,high-temperature treatment at78℃for 10 min,hot water soaking,and high-temperature treatment at 78℃for 5 min showed significantly higher germination percentage from the remaining treatments(75,64,58,56,and 53%,respectively).To break the dormancy of T.laxiflora seed and attain good germination result,seeds should be pretreated with high-temperature at 78℃for 10 min to test the initial germination before storage and should be pretreated with high-temperature(at 78℃for15,10,or 5 min),soaked in cold,or hot water for 24 h to monitor the germination after storage.The two experiments show that T.laxiflora produces orthodox seed.     

漂白胶贮存性质的研究(一报)——漂白胶脱氯反应的研究

本文通过测定脱氯程度不同的漂白胶样品的结合氯含量、热寿命、软化点和颜色,研究了漂白胶脱氯反应的性质,结合氯含量与热寿命的关系以及软化点和颜色的变化规律。发现漂白胶的脱氯反应是一级反应,分为两段,前一段的反应常数为后一段的四倍,说明一部分氯容易脱除,而另一部分则比较难,后者留在漂白胶中对贮存性影响不大。此研究结果为解决漂白胶贮存性差这一难题提供了理论依据和基本途径。通过测定一批样品在多年存放期间热寿命的变化,证实了本研究结论的正确性。     

毛竹林冰雪危害调查及灾后重建技术组装

以靖安县毛竹林为调查研究对象,调查冰雪危害毛竹林的规律,了解毛竹林分防御雪灾的能力,制定毛竹林损伤类型划分,组装毛竹林灾后重建技术.     

Effects of seed water content and storage temperature on the germination parameters of white spruce, black spruce and lodgepole pine seed

The effect of seed water content (WC) (2–3, 5–6 and 22–25%, on a fresh weight basis), storage temperature (+4, −20, −80 and −196°C) and storage duration (6, 12, 24, 48 and 60 months) on the germination of white spruce (Picea glauca (Moench) Voss), black spruce (Picea mariana (Mill.) B.S.P.) and lodgepole pine (Pinus contorta Dougl. ex Loud. var. latifolia Engelm.) seed was investigated. Germination of white spruce control (untreated) seeds and seeds adjusted to 2–3% and 5–6% WC declined after 48 months of storage at −80 and −196°C, with a further decline at 60 months at −20, −80, −196°C. Germination remained high when control white spruce seeds and seeds with 2–3, 5–6% WC were stored at +4°C, over all storage durations. Generally, black spruce and lodgepole pine exhibited high germination at all storage temperatures at 2–3% and 5–6% WC as well as the control (untreated) seed, for up to 60 months in storage. Germination declined for all three species when seed was conditioned to 22–25% WC. This loss in germination was partially recovered in white spruce seed stored at +4, −20 and −80°C after storage durations of 24, 12 and 48 months, respectively, and in black spruce seeds stored at −20 and −196°C after storage durations of 24 months. Mean germination time (MGT) was relatively constant for all species, under all conditions, except for seed conditioned to 22–25% WC, where MGT increased for white spruce seed stored 48 months at −80 and −196°C, and for black spruce seed stored 24 months at +4 and −80°C and 60 months at −196°C. These results show that the optimal storage temperatures are 4°C for white spruce, and 4, −20, −80, and −196°C for black spruce and lodgepole pine, and 2–6% water content is optimal for all 3 species at these temperatures.     

竹质异色重组装饰材工业化生产技术

竹质异色重组装饰材是以竹材为原料,采用柔性竹单元制造、竹束漂白、竹束深度匀染等关键技术,将不同色彩竹束重组制造的具有良好装饰效果的竹质建筑装饰材料。重点介绍了竹质异色重组装饰材工业化生产的主要工艺流程,总结产品开发过程存在的主要问题与解决途径,以期为竹质异色重组装饰材的推广应用提供参考。     

风干土保存时间和湿土培育时间对黄淮海平原潮土酶活性的影响

以经历18年不同施肥管理的土壤为研究对象,阐明它们经过4个不同时间保存或处理后的土壤脲酶、转化酶、脱氢酶、及FDA酶活性的动态变化。处理包括:风干保存30天或鲜土状态、风干保存210天、风干土湿润至田间持水量(25℃)条件下分别培育15天和51天;同时评估这些酶活性的变化程度与土壤本身有机碳含量之间的关系。结果表明,风干土保存时间和风干土湿润后短期培育均对脲酶活性影响很小,但风干土湿润培养51天后其活性则显著降低;随风干土保存时间延长,转化酶活性显著降低;与鲜土相比,风干土湿润培养15天后,脱氢酶活性显著提高,但继续湿润培养至51天后,其活性又降至与鲜土相当,因此风干土湿润培育一定时间后测定的脱氢酶活性可用来代表其田间自然湿度时的状态;FDA酶活性的变异程度最大,与其从鲜土状态至风干状态的活性急剧下降有关。土壤本身有机碳含量与脲酶和脱氢酶的活性变化程度成显著负相关关系,说明土壤有机碳含量是决定它们随环境条件改变而变化的主要因素之一。另外,土壤NH4+-N、NO3--N和可溶性有机碳含量对上述4种处理的响应程度也存在差异。其中风干状态土壤经湿润培育处理后,NH4+-N含量呈先降后升趋势,正好与脲酶活性变化趋势相反;而NO3--N含量整体上呈上升趋势,可溶性有机碳含量则正好相反。