不同处理对可可种子萌发以及幼苗生长的影响

可可是世界三大饮料作物之一，可可种子为顽拗性种子，含水量低于某一相对高的临界含水量时，其种子就会丧失活力。为探讨可可种子的贮藏方法，研究分析了果实处理方法、温度、时间对可可种子发芽及幼苗生长的影响。结果表明：可可种子经过4℃处理后便丧失了发芽力，室温25℃条件下果壳不破开，放置30 d后可可种子仍有近50%的发芽率；清洗可可种子果肉后短时间放置，可以提升种子的发芽势，并且能促进幼苗前期生长。     

浅圆仓膜下氮气气调膜上控温储粮试验

通过改造浅圆仓测温电缆,实现了浅圆仓膜下充氮气调和膜上中央空调控温,提高了卸粮口、大门口、通风口等死角的害虫致死率。将浅圆仓氮气气调杀虫与控温储粮相结合,实现了储粮安全度夏。     

基于智能算法优化SVM的横向通风过程中温度场预测方法探究

将改进的智能预测技术应用于储粮横向通风过程中的粮堆温度预测,为粮食通风智能预测与决策提供了一种新思路。选取河北清苑国家粮食储备库冬季横向通风的实时监测数据,在分析主要影响因素的基础上,应用三种智能优化算法——网格寻优算法、GA遗传算法寻优、PSO粒子群算法,结合回归支持向量机理论,对粮堆的通风过程进行建模。结果表明,优化过的回归预测模型能较好地拟合粮食温度与其他变量之间的非线性关系,尤其是当样本数量较为有限时,该方法具有更高的拟合精度,更适合对储粮通风这一强非线性过程的预测研究,对于人工干预操作具有一定的现实指导意义。     

3种含氯消毒剂对柑橘黄龙病菌室内防治效果研究

柑橘黄龙病是柑橘生产上最具毁灭性的病害，目前没有防治特效药也没有较好的抗性品种。本文以含氯消毒剂作为柑橘黄龙病菌防治的候选药剂开展药剂筛选试验。将染病接穗分别浸泡3种含氯消毒剂再嫁接到健康枳壳砧木上，利用定量PCR技术定量分析药剂处理前后黄龙病菌含量的变化，建立柑橘黄龙病菌药剂防治效果评价体系。试验结果表明，漂白粉（CH）不适合利用嫁接技术进行候选药剂筛选；二氯异氰尿酸钠（NaDCC）和三氯泡腾消毒片（TCCA）的抑菌效果随处理浓度的降低而减弱，在有效氯含量为5000mg/L时，病菌减退率最高，分别为99.1%和99.5%，相对防效最佳，分别达到了97.9%和98.8%，与对照药剂盐酸四环素(TET)的抑制效果相当，说明NaDCC和TCCA可以作为柑橘黄龙病化学防治的候选药剂。     

高校图书馆保存本的改革

高校图书馆保存本必须改革。文章指出保存本存在的问题以及改革的必要性、措施和意义,改革的有效措施是变保存本为特色馆藏。     

解除休眠水曲柳种子的再干燥贮藏

以解除休眠的水曲柳种子为材料,研究种子再干燥脱水贮藏的可行性。结果表明:已解除休眠的种子在室温条件下进行再干燥是可行的,干燥处理后种子的萌发率和平均发芽时间没有明显变化;但在5℃条件下再干燥是不可行的,干燥后种子萌发率、发芽指数显著下降,平均发芽时间明显延长。已解除休眠的种子在室温条件下再干燥处理后贮藏16个月内种子的萌发率没有显著变化,但随着贮藏时间的延长种子发芽指数显著下降,平均发芽时间显著延长。已解除休眠水曲柳种子再干燥贮藏后使用KT、GA3和乙烯利处理对种子的萌发都没有明显的促进作用。     

Strawberry Production in Central Europe

Abstract

This paper focuses on the cropping systems in central European countries such as Belgium, The Netherlands, UK, Ireland, Germany, Switzerland and the northern part of France and Italy. During the last decade there has been a consistent increase in programmed “out-of-season” strawberry production in several central European countries. This is being achieved in part, by using cultivars with different cropping seasons, but mainly by sequential planting of cold-stored plants and by growing strawberries in greenhouses and plastic tunnels. These methods have made it possible to extend the strawberry production for 11 months, from the end of February until mid January in central European countries with moderate climates.     

Shelf-Life of Spanish Mackerel (Scomberomorus commerson) from Northern Australian Waters

Abstract

The shelf-life of Spanish mackerel caught by line fishing in Northern Australian waters was evaluated. Spiked fish were stored in ice either headed and gutted or left uncut and subjected to sensory, nucleotide, pH, histamine and microbial analysts and the rigor pattern recorded. There was little difference between the two product forms. Rigor in uncut fish lasted for 14 ± 9.8 hours and in headed and gutted fish for 19.6 ± 16.3 hours. Spanish mackerel retained good sensory quality for up to 14 days. The bacterial load reached 105 cfu/g by 18 days. K values were low for most of the storage time, < 40%. Histamine levels did not develop more than 10 mg/kg during storage. The pH of Spanish mackerel did not change much even though bacterial levels become high.     

蓝莓贮藏保鲜技术研究进展

本文介绍了蓝莓的营养成分和保健功效，并综述了国内外贮藏保鲜技术的研究进展，包括冷藏、预温处理、气调、涂膜、熏蒸、UV-C辐射和高压静电场等保鲜方式。鉴于我国蓝莓市场的广阔前景，提出了其产业的发展方向和研究着重点。