大棚西瓜一年两茬无公害高效栽培技术

改变传统的西瓜种植方式,文章介绍了西瓜“一年两茬”无公害高效栽培新技术,对提高西瓜生产水平具有重要意义。     

保护地西瓜长季节栽培主要病虫害综合防治技术

西瓜长季节栽培模式是一种高效农业模式,将原来的西瓜生产周期由5~6个月延长到9~10个月,西瓜的采收由1~2茬增加至5~6茬。该种植模式在增强西瓜生产效益的同时,也对西瓜栽培管理提出了更高的要求,特别是对病虫害防治提出了更高的要求。该文介绍了长季节西瓜栽培生产过程中的主要病虫害,并提高了综合防治技术,为西瓜长季节生产提供技术参考。     

草莓—西瓜栽培模式专用型西瓜品种“陶丰一号”的选育

为了促进长丰县草莓和西瓜产业的发展,解决草莓让茬后种植西瓜的主要瓶颈问题西瓜紫瓤病,通过不断努力育成了适应草莓一西瓜栽培模式的新品种“陶丰一号”。两年多点对比试验显示,新品种“陶丰一号”与对照西瓜品种“京欣”相比具有产量突出、性状稳定且高抗紫瓤病等特性,有力地推动了草莓一西瓜栽培模式的发展,这对于安徽省农业发展和农民增收具有重要意义。     

日光温室西瓜一年三茬高效栽培技术

针对日光温室西瓜连续多茬生产存在的光照、温度不适的亚环境以及连作障碍等问题,通过人工补光、人工加热方式进行环境调控以及秸秆腐熟还田和施用微生物有机肥改善土壤养分,利用营养液土壤栽培模式实现水肥最适化管理.第一、三茬选用黄金宝,采用红蓝配比为7∶1,灌溉水体温度为35℃,进行光热调控,定植时间分别为8月中旬和3月下旬,第二茬选用美丽品种,11月中下旬定植;采用功能性堆肥配套秸秆生物反应堆改良土壤;早春茬和秋冬茬栽培滴液量分别为66 300 L/667 m~2和79 070 L/667 m~2;一年三茬西瓜栽培比一年一茬西瓜一茬番茄经济效益提高40%.通过以上措施,实现了日光温室西瓜一年三熟安全、高效生产.     

凉州区日光温室蔬菜几种主要高产高效栽培模式

从品种选择、茬口安排、产量及效益等方面总结出了凉州区日光温室蔬菜越冬一大茬高产高效栽培模式、一年两茬高产高效栽培模式、西瓜一年四茬高产高效栽培模式。     

北京蔬菜园区小型西瓜或甜瓜+樱桃番茄或球茎茴香高效种植模式与技术

该文重点介绍北京日光温室春茬小型西瓜或厚皮甜瓜、秋冬茬樱桃番茄或球茎茴香典型高效种植模式与栽培关键技术,该模式在北京郊区蔬菜园区生产中为效益突出、市场稳定、管理省工的主要模式之一。     

昌乐春瓜秋菜栽培效益高

山东省昌乐县是著名的保护地瓜菜之乡,保护设施以大拱棚为主,一年种植收获两茬,早春以种植西瓜为主,秋季以种植辣椒为主,形成了特有的大拱棚“春季西瓜＋秋季辣椒”栽培模式,成为“早春西瓜”、“秋延迟辣椒”的主要产区,在丰富全国“菜篮子”的同时,为昌乐农民带来了可观的经济效益。     

竹架大棚礼品西瓜-水稻水旱轮作栽培模式

竹架大棚发展礼品西瓜。就地取材投入不大,早熟栽培能在。五一。节前后上市,销售价格高;西瓜下茬种植粳稻,产量高、品质好,二者有机地结合,形成“水稻＋N”中的特色栽培模式。西瓜一水稻水旱轮作循环,调优了传统的“稻-麦（油）”种植结构,拓展农民增收渠道,具有较好经济、社会和生态效益。     

淮北地区“优质粳稻-冬闲+早春西瓜”高效栽培模式及效益分析

为探索解决苏北地区稻麦周年协调高质高效生产的矛盾,利用西瓜与水稻水旱轮作,通过“优质粳稻-冬闲+早春西瓜”栽培模式,充分利用当地温光资源优势,纯效益超过52500元/hm²,实现了粮、经兼收,又达到了用地与养田的结合,是“水稻+N”模式下产值和效益较为突出的栽培途径,值得借鉴与推广应用。     

日光温室西瓜一年三熟高效栽培技术

<正>利用日光温室进行西瓜一年三熟栽培,不仅可以实现日光温室内多茬栽培,提高经济效益,而且还成功地填补了当地日光温室西瓜栽培的空白,实现了周年生产。古浪县在2008年日光温室秋冬茬小面     

Segregation of form, color, movement, and depth: anatomy, physiology, and perception

Anatomical and physiological observations in monkeys indicate that the primate visual system consists of several separate and independent subdivisions that analyze different aspects of the same retinal image: cells in cortical visual areas 1 and 2 and higher visual areas are segregated into three interdigitating subdivisions that differ in their selectivity for color, stereopsis, movement, and orientation. The pathways selective for form and color seem to be derived mainly from the parvocellular geniculate subdivisions, the depth- and movement-selective components from the magnocellular. At lower levels, in the retina and in the geniculate, cells in these two subdivisions differ in their color selectivity, contrast sensitivity, temporal properties, and spatial resolution. These major differences in the properties of cells at lower levels in each of the subdivisions led to the prediction that different visual functions, such as color, depth, movement, and form perception, should exhibit corresponding differences. Human perceptual experiments are remarkably consistent with these predictions. Moreover, perceptual experiments can be designed to ask which subdivisions of the system are responsible for particular visual abilities, such as figure/ground discrimination or perception of depth from perspective or relative movement--functions that might be difficult to deduce from single-cell response properties.     

Mineralogy, petrology, and surface features of lunar samples 10062,35, 10067,9, 10069,30, and 10085,16

The primary rocks are a sequence of titanium-rich basic volcanics, composed of clinopyroxene, plagioclase, and ilmenite with minor olivine, troilite, and native iron. The soil and microbreccias are respectively loose and compacted mixtures of fragments and aggregates of similar rocks, minerals, and glassy fragments and spheres. Impact events are reflected by the presence of shock metamorphosed rock fragments, breccias, and glasses and their resulting compaction to form complex breccias, glass-spattered surfaces, and numerous glass-lined craters. Chemistry of the glasses formed by the impact events is highly variable, and the high iron and nickel content of a few moundlike features suggests that at least some of the projectiles are iron and nickel-rich meteorites.     

Research and development, productivity, and inflation

R & D, through its effects on the rate of productivity increase, can significantly restrain the rate of inflation in the medium and long run. High rates of inflation damage the workings of the price system and impair the efficiency of practically all economic activities, including R & D. Findings suggest that the percentage increase between 1969 and 1979, in total real R & D expenditures, has been exaggerated due to the inadequacy of the gross national product deflator as applied to R & D.