双鸭山地区大棚春甜瓜高产栽培技术

1选择早熟品种选择早熟、高产、品质好，抗逆性强，市场畅销品种，如奥奇814甜瓜、永甜3号、龙甜4号、泽甜乳玉、龙庆2号、泽甜国美、龙庆3号。     

露地栽培甜瓜品种叶片衰老生理生化特性比较试验

露地栽培下,以薄皮甜瓜绿皮品种齐甜1号、日本甜宝、芝麻酥为材料,比较不同薄皮甜瓜品种植株叶片生理特性。旨在研究不同品种叶片衰老特性,为实现高产高效栽培、选择生长势强品种提供理论依据。结果表明,薄皮甜瓜植株叶片抗衰老能力随着生育期的延长而下降,总叶绿素和可溶性蛋白含量,丙二醛(MDA)含量升高,降低过氧化物酶(POD)活性。综合比较叶片抗衰老能力由强到弱依次为齐甜1号、日本甜宝、芝麻酥。     

瓜菜良种简介

蜜龙网纹甜瓜,碧龙网纹甜瓜,黄帝彩椒1号,豫椒15号,豫墨7号西瓜,豫艺新量2号番茄,赣新特长露地王豇豆 ，甜瓜新品种——日本砧石甜宝，黄瓜新品种——津园5号，微型番茄——艾斯佳F1，台湾新一号无籽西瓜（新先锋），抗裂京欣王1号（新先锋），     

温室甜瓜高产栽培技术

<正>1育苗1.1品种选择选择早熟、品质优良,具有一定的抗寒性和较强适应能力的优良品种。目前朝阳市栽培的甜瓜多为薄皮甜瓜,栽培较多的有翠宝、丰甜一号、中甜一号,生育期短,产量高。1.2苗床准备在温室内,选择温度和光照较好的部位做床,为了保证温度应设小拱棚保温,并增加临时加温设备以应对寒潮来袭。1.3营养土的配制培养土要求养分齐全、酸碱适度(pH6.5~7.0)、疏松通透、无病菌虫卵草籽及除草剂污染。采用肥沃     

棚室厚皮甜瓜栽培管理技术

一、品种选择棚室栽培厚皮甜瓜品种应以早熟、中熟优质品种为主,辅助适量中晚熟品种,主要有伊丽莎白、鲁厚甜1号、鲁厚甜2号、银蜜子、黄河蜜、状元、蜜兰、农科8号网纹厚皮甜瓜等。     

27个白皮类型厚皮甜瓜品种比较与综合评价

为筛选适合海南冬季设施栽培的白皮类厚皮甜瓜品种,对国内27个白皮类厚皮甜瓜进行品种比较试验。结果表明,蜜宝一号果实生育期最短,为30 d; M 2-23果实生育期最长,为42 d; FM 1764、雪蜜29产量最高,为3 150 kg/667 m²;红蜜脆4号心糖含量达19.10%;对甜瓜资源农艺性状的相关性分析表明,单果重与果实纵径、横径、肉厚、果腔大小、下胚轴粗呈极显著正相关;利用主成分分析法对不同品种的品质、产量、苗期性状等进行综合评价,12个农艺性状可转化为4个主成分,主成分累积贡献率为85.211%,能很好地代替12个农艺性状来综合评价27份白皮厚皮甜瓜品种。品种东方蜜脆5号综合得分3.2,排名第1,昊丰蜜、红蜜脆4号、M 2-21、蜜玉、雪蜜29、潘氏白雪蜜、玉露3号、M 2-23、脆红蜜等9个品种表现较好,可以作为海南冬季白皮类型甜瓜品种引进和推广的优先选择。     

陕西关中地区甜瓜三膜覆盖栽培技术

1品种选择 厚皮甜瓜应选早熟、抗病、外观和内在品质佳、高产稳产、耐贮运的品种,商品瓜应具备果型圆整、果个中小、香味浓郁等特点,主栽品种有一品天下208、新早蜜1号、早蜜先锋、早蜜1号。     

雪峰小玉7号西瓜早春保护地栽培技术

为使雪峰小玉7号西瓜种植达到高产、优质的目标,本文从早春保护地栽培、合理肥水与温湿度管理、病虫害防治、适时采收等几个方面介绍了雪峰小玉7号西瓜早春保护地栽培技术。     

精品小西瓜栽培技术要点

1 选择优良品种 目前市面上的小西瓜品种还不多，国产品种主要有华蜜掌中宝和华蜜小精灵等，进口品种主要有日本的特小凤、早春红玉、黑美人等。 2 确定栽培季节 由于小西瓜生长期短，一年可多季栽培。目前生……     

日光温室冬季管理要点

1了解市场行情，确定主栽品种适合南乐县日光温室冬季栽培的瓜菜品种很多，如黄瓜、西葫芦、西红柿、茄子、辣椒、豆角、西瓜、甜瓜、洋香瓜、芹菜、速生叶菜、野菜等。要根据温棚结构、人力、物力、技术水平，更重要的是市场行情，选择经济效益相对较高，种植风险小的蔬菜品种做为主栽品种。     

植物新品种保护与品种审定的意义和异同

随着知识产权愈来愈受到社会各界的关注，植物新品种保护工作也显得尤为重要。该文着重介绍了植物新品种保护的发展概况、意义及其与品种审定的异同，使读者对植物新品种保护工作有所了解。     

大白菜施肥技巧与主要病虫害防治

1施肥技巧 大白菜施肥原则是：整地重施有机肥，苗后分次巧追肥。追肥要掌握“少量多次、前少后多、分期供给”。肥后及时浇水，以达到肥水均匀，充分发挥肥效。     

果蔬采后存在问题及贮藏保鲜技术发展

随着生活水平的提高,果蔬产品成为人们摄取营养元素的重要食品之一。分析了我国果蔬采后存在的问题,并对低温及气调保鲜、化学保鲜剂、涂膜保鲜技术及超声保鲜技术等贮藏保鲜技术研究进行了综述,指出我国果蔬贮藏保鲜技术持续、稳定、健康的发展要倚重于科技创新。     

Dry matter and nitrogen accumulation and residues of oil and protein crops

Oil and protein crops are of growing importance in cropping systems. This study was carried out to compare oil crops of linseed, rapeseed, sunflower and protein crops of faba bean and white lupin for grain production, residual plant dry matter and nitrogen. Two field experiments with either oil or protein crops were conducted in 1993 and 1994, respectively. Total dry matter production, grain yield, residues, N concentrations and mineral N in the soil were measured. Dry matter production and distribution as well as N uptake and residues varied greatly among species and between years. In 1993, oil crops gave up to 3 t ha⁻¹ grain and 16 t ha⁻¹ residues with sunflower, while in 1994 up to 5 and 11 t ha⁻¹, respectively, were recorded with winter rape. Protein crops showed an opposite reaction in years. Nitrogen uptake and residual N amounts were correlated with dry matter production. Plant residues of oil crops contained 20–140 kg N ha⁻¹; those of protein crops up to 80 kg N ha⁻¹. Despite the variation of residual plant N the variability of mineral N in the soil at harvest was hardly influenced by crops and amounted to only 20–50 kg NO⁻₃-N ha⁻¹.     

我国蔬菜产业和科学技术的发展与展望

1　我国蔬菜产业的发展现状蔬菜是人们日常生活中不可缺少的副食品,也是我国目前种植业中最具活力的经济作物。改革开放以来,随着市场经济的发展,农产品产销体制的不断改革和完善,特别是1988年实施“菜篮子工程”以来,蔬菜产业得到了蓬勃发展。1.1　播种面积1987~1999年,全国蔬菜播种面积由533.3万hm²,发展到1333.3万hm²,增长139.5%。1.2　总产量1987~1999年,全国蔬菜总产量由1.55亿t增加到4.05亿t,增长161.3%,使年人均鲜菜占有量达到330.7kg(世界各国人均105kg……     

向日葵抗盐碱生理生化机制与生长发育特性分析

以Y05-222A和Y06-136R杂交得到的135株F₂群体为研究材料,测定过氧化物酶（POD）、超氧化物歧化酶（SOD）、脯氨酸（Pro）、过氧化氢酶（CAT）、可溶性蛋白和丙二醛（MDA）等6个生理指标,并进行方差分析、相关性分析和通径分析,对F₂群体进行偏度及峰度分析。结果显示,以上6个生理指标在F₂群体中P>0.05,分布频率符合正态分布,同时存在双向超亲分离现象;相关性分析和通径分析显示,这些指标与抗盐碱系数均呈极显著相关（正相关或负相关）,且相关系数与总间接通径系数方向一致。POD活性的直接通径系数为0.5003,可见POD直接影响抗盐碱性;CAT活性和Pro含量的直接通径系数分别为-0.1317和-0.0384,间接影响抗盐碱性;SOD活性、MDA及可溶性蛋白含量直接或间接影响抗盐碱性。POD、SOD、Pro、CAT、可溶性蛋白和MDA各生理指标的抗盐碱作用表现为POD>CAT>Pro>可溶性蛋白>MDA>SOD。叶片数、株高、茎粗和盘径与抗盐碱系数呈极显著正相关,其相关性表现为叶片数>盘径>株高>茎粗。以上结果可为研究油用向日葵抗盐碱性提供一定的理论基础。     

Approaches and Applications of Chemomics and Chemoinformatics

Some novel concepts of chemomics/molomics are proposed including hydrocarbomics, alcophenomics, carboxomics, pepitomics, metabonomics, etc. like genomics, protomics and glycomics in bioomics. Some examples are given to demonstrate the chemomics and/or molomics methodology and technology based chemoinformatics and bioinformatics and their wide applications in Chemistry and Biology.     

果蔬食品的褐变与控制

结合生产实际,对果蔬食品产生褐变的机理及其控制途径进行探讨。通过遗传学途径,培育果蔬新品种,使之不含易氧化变色物质,增强其天然抗褐变性,是控制果蔬褐变的根本途径。     

On Fengshui and Rockery and Water Layout

Definition of Fengshui and the theories of selecting mountain and water environment in Fengshui were elaborated. Theories about mountain-water relationship were expounded from the perspective of piling of rockeries and layout of water, a residential area in Hefei City, Beijing Olympics Park, Hangzhou Prince Bay Park, mineral pit of Shanghai Chenshan Botanic Garden, Beijing Beihai Park, Shanghai Changfeng Park were taken for example to demonstrate the influence of traditional rockery and mountain layout in Fengshui on modern landscape design.     

Acidity and sweetness in apple and pear

Summary Sweetness and acidity in apple and pear inherit independently and can be organoleptically evaluated separately, but less accurately in pear than in apple. For breeding purposes an analysis of fruits for acidity and sweetness with pH indicator paper and a hand refractometer is to be prefered to the organoleptic method.In apple, the acidity-decreasing with time-of the unripe fruit was already strongly indicative of that of the eating-ripe fruit; sugar-increasing with time-not before the fruit was picking ripe. Sugar content in apple and pear, and the pH in pear, appeared to be normally distributed; the pH in apple showed a segregation into an acid and a low-acid group, which occurred in both the unripe and ripe stage. The segregation ratio between these groups was found to be highly variable. On the whole, the mean acidity and sugar content of apple and pear progenies is significantly determined by that of the parents. Most of the observations made did not support the theory that low acidity in apple is determined by one recessive gene. The relationship between the pH of leaf juice and fruit juice in apple may offer a possibility for pre-selection.