利用多时相HJ卫星CCD遥感影像提取嘉祥县秋收作物

作物种植面积对调整农业结构、制定区域粮食安全政策有着十分重要的意义。本文以山东省嘉祥县为研究区,利用3景不同时相的HJ卫星CCD遥感数据,结合野外调查样本,通过分析研究区主要秋收作物(玉米、棉花和水稻)在不同生育期的光谱特征和归一化植被指数(NDVI)的特点,对分类影像进行系列阈值分割、掩膜处理,最后利用决策树算法成功提取了山东省嘉祥县的玉米、棉花和水稻的种植面积,总体精度分别达到93.31%、89.41%、95.82%。     

基于XMPP的即时通信网关应用研究

XMPP最终要实现不同即时通信系统间的互通。主要介绍对XMPP与其他IM互连互通的网关原理及其应用进行的研究讨论,并以jabber系统与MSN Messenger进行互发信息作为实例进行详细阐述。     

超高产水稻品种叶绿素变化规律研究初报

对3个产量水平不同的水稻品种叶绿素含量变化规律进行了研究。结果表明：超高产品种沈农606和高产品种辽粳294在整个生育期内叶绿素含量都高于秋光，特别是在生育后期叶绿素含量下降迟缓，成熟时明显高于秋光，但其叶绿素a/b值始终低于秋光。沈农606和辽粳294齐穗后积累的干物质较多，且产量高于秋光，可能与它们具有较高的叶绿素含量和较低的叶绿素a/b.     

黑米黄酒工艺及产品稳定性研究

以黑米为原料生产黑米黄酒,黑米色素提取以浓度为20%-30％（v／v）的乙醇或米酒为最佳萃取溶剂,分两次萃取;黑米色素溶液及加工的黑米酒系列产品在酸性条件下色泽较稳定,适量使用蔗糖、柠檬酸或抗坏血酸等护色剂可明显提高产品色泽的稳定性;加工黑米黄酒,黑米原料仅需15％-20％,其余可用白糯米代替。（孙悟）     

瓶装黄酒出现"热浑浊"现象的预防和控制

黄酒的机械化灌装易出现“热浑浊”现象．直接影响产品质量和企业的经济效益。其主要由高温灭菌和灭菌后酒未冷却就装箱堆放引起。解决“热浑浊”的预防和控制方法有水冷法、风冷法和自然冷却法。（孙悟）     

火焰原子吸收光谱法连续测定黄酒中的金属离子

用微波消化罐消化样品,以火焰原子吸收光谱法在同一系列体系中测定黄酒中微量铜、锌、铁、锰的方法。考察了硝酸、过氧化氢的不同用量以及消化时间长短的影响和在同一体系中铜、锌、铁、锰的彼此干扰情况。结果：检出限铜为0．0048μg／mL,锌为0．0062μg／mL,铁为0．0045μg／mL,锰为0．0081μg／mL,相对标准偏差为2．0％～4．5％,回收率为99．6％-102．1％。     

蛹虫草菌保健黄酒的研究

以蛹虫草菌培养基为主要原料,采用喂饭法通过对其总醪加水量的控制、糯米与蛹虫草菌培养基比例以及糖化剂接入量的确定进行研究,生产出风味俱佳的保健黄酒。结果表明,最佳配比方案为：黄酒专用干酵母用量为0．2％,糖化酶用量为10％,总醪加水量为3倍,糯米：蛹虫草菌培养基1：1。     

Cytokinin Confers Brown Planthopper Resistance by Elevating Jasmonic Acid Pathway in Rice

Plants have evolved a sophisticated defense system that employs various hormone pathways to defend against attacks by insect pests. Cytokinin (CK) plays an important role in plant growth and stress tolerance, but the role of CKs in plant–insect interaction remains largely unclear. Here, we report that CKs act as a positive regulator in rice resistance against brown planthopper (BPH), a devastating insect pest of rice. We found that BPH feeding promotes CK biosynthesis and signaling in rice. Exogenous application of CKs significantly increased the rice resistance to BPH. Increasing endogenous CKs by knocking out cytokinin oxidase/dehydrogenase (OsCKXs) led to enhanced resistance to BPH. Moreover, the levels of the plant hormone jasmonic acid (JA) and the expression of JA-responsive genes were elevated by CK treatment and in OsCKXs knockout plants. Furthermore, JA-deficient mutant og1 was more susceptible to BPH, and CK-induced BPH resistance was suppressed in og1. These results indicate that CK-mediated BPH resistance is JA-dependent. Our findings provide the direct evidence for the novel role of CK in promoting insect resistance, and demonstrate that CK-induced insect resistance is JA-dependent. These results provide important guidance for effective pest management strategies in the future.